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  1. mark2410
    RHA T20 Quick Review by mark2410
    Written by mark2410
    Published Dec 4, 2015
    Pros - Construction is Magnificent. Looks magnificent. Sounds Magnificent
    Cons - Is somewhat unyielding. Can’t really do soft. Can be unforgiving.
    RHA T20 Quick Review by mark2410
    Thanks to RHA for the sample.
    Full review here http://www.head-fi.org/t/790030/rha-t20-review-by-mark2410
    Brief:  Timberal and tonal extraordinaire just got even better.
    Price:  £180 or about US$240 (plus about a tenner if you want the mic’ed version)
    Specifications:  Drivers DualCoil™ Dynamic, Frequency range 16-40,000Hz, Impedance 16 Ohm, Sensitivity 90dB, Rated/max power 2/5mW, Weight 39g, Cable 1.35m, multicore OFC, Connections 3.5mm, gold plated
    Accessories:  Tuning Filters with Holder, 6 pairs, dual density ear tips - S x2 / M x2 / L x2, 2 pairs, double flange ear tips - S x1 / L x1, 2 pairs, memory foam ear tips - universal fit, Stainless steel ear tip holder, Premium carry case, Clothing clip
    Isolation:  For a dynamic it’s actually really good.  Pushing towards BA levels, so it’s easily fine for on a bus or out and about.  Would do for flight or the Tube in a pinch.  Oh and easily sufficient to make you road kill if you don’t use your eyes when out.
    Comfort/Fit:  Despite the ear guides both were really good actually.  I’d probably have preferred without the guides but no problems, over and shove in to get the seated and then I was happy wearing all day.  Good stuff.  Oh and they must be worn up in case that’s an issue for you.
    Aesthetics:  They look outstanding.  Arguably the best looking earphones available at present.
    Sound:  All of the sound.  They are pretty damn awesome at everything.  You can nudge things about by using the filters that they come with but I’m sure you’ll play with them for the first day.  Then you’ll pick your favourite and never swap them again.  For me that was the Bass filter, though I came extremely close to going with the Reference filter.  I’m pretty treble sensitive and the Bass one mutes a bit so it won.  Not that I couldn’t have lived with the Reference if that had been the only option.  It’s labelled Reference but it’s still kinda slanted towards the bass over strictly neutral but it feels a very natural balance.  The Bass bumps the bass up by dialling the treble down, the Treble opens things up which dials down the bass.  The bass is lightning fast and it loves to punch, no, more like slap with you with a marble hand.  There is such rigidity and power yet it lacks any brutality.  Its marble like solidity yet so beautifully sculpted.  Its mids are wonderful too, a little cool perhaps but so well-articulated and tonally masterful.  Highs are cleanly metallic edged and can shimmer like nobody’s business with superb extension. 
    In short, the thing is excellent in every way, in tone, agility, potency are all impeccable.
    Value:  Well they aren’t cheap, but nothing at this audio quality level is.  With their insane build and warranty you arguably get a superb bargain, if you want top end earphones that is.
    Pro’s:  Construction is Magnificent.  Looks magnificent.  Sounds Magnificent
    Con’s:  Is somewhat unyielding.  Can’t really do soft.  Can be unforgiving.

  2. Koolpep
    Does Dual Coil technology work - the new flagship from RHA, will the T20 deliver?
    Written by Koolpep
    Published Jun 14, 2015
    Pros - love-child of MA-750 and T10, crazy good bass, interchangeable filters, soundstage and sound quality, build quality.
    Cons - weight, needs proper seal, no detachable cable
    RHA T20 Review
    RHA just launched the T20 in the UAE where I live. It was a great event in a brand new beautiful hotel, the TAJ Dubai, perfect choice, RHA :wink:
    I was lucky enough to attend this event and got the chance to listen to the T20 and also listen to a review sample for the following days.
    The way RHA is supporting the local distributor and the audiophile community is really exemplary and a shining example for other manufacturers in the region. Thanks as well to gadgitechme.com for their support. All pictures in this review can be viewed at full resolution. Just click on them.
    one earpiece without tip of T20 in front, T10 in back
    About RHA:
    RHA is short for Reid Heath Audio - a Scottish headphone company that is still quite young but churning out better and better earphones with amazing quality and generous warranty.
    From release to release RHA managed to up the quality and production value of their earphones. It seems that every detail they learned was implemented in the subsequent product - and they listen closely to what the community and customers have to say. A very interesting approach to start with the lower cost headphones and work your way up step by step. It's not the easiest way to establish a brand but I like it.
    RHA produces their own drivers and uses metal housings for their headphones which makes them stand out from the competition.

    T20 with another newby - Fiio X5ii
    Does the T20 deliver: Yes. Clearly the new flagship in the RHA stable. Their best in-ear yet. 
    About myself:
    As a benchmark: I am 42, my headphone inventory can be found in my profile. The test was conducted mostly with the Fiio X5ii, the CEntrance DACmini CX with 1 Ohm mod, the AK100, an iPhone 6 and lastly an iFi iDSD micro. I listen to an eclectic choice of music from industrial to classic, mostly FLAC and ALAC but also some MP3 320kbps and AAC 256 kbps thrown in.
    I own the MA350, MA 750 and T10, none of the earphones I have from RHA have a microphone, the respective i-versions of these in-ears do have an iOS compatible remote and mic. The mic does work with most Android phones as well….
     Manufacture’s Specifications
    1. Type: in-ear
    2. Drivers Size: ??
    3. Drivers Type: Dynamic with Dual Coil(TM)
    4. Frequency Response: 16Hz to 40KHz
    5. Sensitivity: 90dB @1mW
    6. Impedance:  16 Ω
    7. Microphone sensitivity: 
    8. Maximum Input:  2/5mW
    9. Cable: multicore OFC, 1.35mm thick
    10. Weight with cable: 39g  
    11. Connector: 3.5mm single ended
    12. MSRP:  $279
    The T20 is constructed with injection molded, stainless steel components. It has a thick and sturdy cable that is not replaceable. The design is identical to the T10 and T10i with the exception that the cable is now black instead of grey. Everything feels top quality and the 3 years warranty is certainly something you can believe in. The in-ear comes with replaceable metal tuning filters that alter the sound to a certain extend. RHA calls the driver technology “revolutionary” - well, we'll see about that later. Let me explain what is special on these drivers.

    T10 and T20 next to each other. T20 has the black cable
    Dual Coil Dynamic Driver:
    This driver supposedly outperforms conventional drivers in resolution, clarity and detail with the use of two voice coils for one diaphragm. The way it works is that there is a voice coil on the outer edge of the diaphragm and one in the “normal” place in the middle of the diaphragm. The coils are operating independent from each other, the outer one (ring shaped) is responsible for the highs and the inner one for the lows. While we recently saw quite a few hybrid designs with in-ears using one or more balanced armature drivers and a dynamic driver, or dual drivers opposing or in line, etc, this is indeed a different approach. 



    The metal body feels extremely well made and sturdy. Like the T10 before them, they are worn over the ear with a patent pending ear hook system. I don’t know what exactly is patent pending on it though, forgot to ask.


    Build quality

    Solid and reliable. Everything I mentioned in the review of the 750 is valid here too. They seem to be rock solid and should outlast man other headphones. And if not: they come with a 3 year warranty that should help with the peace of mind.
    For a projected price slightly below $300 I would have loved to see a detachable cable. 



    They slip into my ears like customs, I sound like a fanboy because if it comes to the fit with the T20 (or T10, MA750) I really am a fanboy. I have funny ear canals, right and left are different so finding something that is easy to insert and provides a great seal without filling around is really making me very happy. Others might not be as lucky but as the T10 these just fit perfect in my ears, comfortable for many hours, they “disappear” - they sit deep enough in your ears so you don’t feel their weight (39g).

    Supplied accessories

    Standard RHA fare. Nothing new from the MA750 or T10. A nice and soft carrying case (zip-up wallet style) made of soft touch plastic with compartments for all supplied accessories, including the metal tip holder. Great selection or ear tips: 6 pairs of silicone tips, two pairs of double flange tips and two pairs of memory foam tips (10 pairs in total).  A clothing clip is also provided. Like the T10 the additional 2 pairs of tuning filters come screwed into a nice carrying plate made of brushed metal with a color coding on them to distinguish between the filters.
    Carry case filled with accessories
    Size comparison carry case
    Supplied accessories
    Sound tuning filters in their metal plate holder (screw in)
    Ok, so the preliminary price of the T20 is $279 so around $80 more than the T10 and double the price of the MA750… So how does it stack up soundwise? I really liked the T10’s sound - however I found it a bit too thick on the bass, even though I consider myself a semi-basshead, but I like it well delivered and not bloated or overly emphasized. I am happy to say this has been fixed. The T20s indeed deliver everything the T10 did well and fixed most of the shortcomings. It's probably the most neutral in-ear from RHA so far.
    Frequency response curve - red-treble filter, black bass filter, grey reference...
    I have done the whole review with the reference filters. I will update this review when I have spend more time listening to the Treble and Bass filters.


    Punchy, fast and dry - lovely. This is the bass you want, not too overpowering like the T10 but so THERE if you need it. Hard to describe but the bass is extremely impactful when needed but has a bit of distance in it, so it hits you in front of your head - like with speakers or at a concert. In short - the bass is amazing and it hits hard when it needs to and is absent when it’s absent in the music. Not an easy feat. Way enhanced towards the T10 - Exactly the way I like it. The only criticism I might have is that really low sub bass quality could be a tad better. But then, this is complaining on a very high level. 


    More forward than the T10, giving this headphone a lovely fun signature. Female vocals sound great and full, male vocals are clean and engaging.

    Haahhh, so much detail. While it’s not a multi balanced armature in-ear it does deliver a lot of detail and clarity indeed. Definitively increased from the T10, they do sound like BA drivers. Not sure how (well probably the dual coil) they did this but the range and detail of available on tap is amazing. With the reference filter the experience is amazing - such an extension from the T10. No wonder these in ears got the HiRes certification from the Japan Audio Society.


    Since people asked: left T10 filters with screw up, right T20 filters. They are identical.
    Filter sets are identical between the T10 and T20.

    coming soon


    vs. T10 with Reference Filter: Putting the bass filters on the T20 is elevating the bass back into basshead levels. Still articulate but it's a LOT of bass. I swapped back and forth with the T10 with Reference filter and must say, the bass is now on T10 level. However you still hear the slightly recessed mids from the T10 that come apparent in that A/B test. Testing the different filters shows, that the T10 is not a bad in ear at all.

    vs. T10 with Bass Filter: Geeez, T10 whips the ass of the T20 in bass quantity - that's basshead calibre. The T10 is getting into bloated territory with the bass filters. It can be fun for some songs, but it's too much for me. But I can see the appeal for bass lovers with this filter.

    Vs. T10 with treble filter: Still lots of bass on the T10 - however the treble can flow freely into your ears, makes the T10 more V-shaped and enjoyable for me. It's the same amount of bass as with the Reference filter but thanks to the less rolled off highs, you can listen to lower volume and here have a more balanced sound. For the T10 - these are my favorite filters.

    Summary: The T20 with bass filter are close to the T10 with treble and reference filter in bass quantity. Quality remains better with the T20 though. They should please bass lovers with this filter... The bass is lovely elevated and still has lots of texture. Not my favorite filter for the T20 but clearly a fun thing to use with certain genres.



    Sound Stage and instruments separations

    The way you want it. Expansive but not overly expansive (or artificially large) but enough and I find it deeper than what you usually get in this price range. Pretty exciting balance. It reminds me of my Hifiman HE-560 which envelopes you in the music. The T20 can do that too. Precise and defined placement of instruments. Perfect. I thought long and hard what could be better, and I am not sure I could find something I was missing.

    ​Plug of the T20 (left) and T10 (right) - reads: 303F - 522 for T20 and 303F - 448 for T10
    vs. T10:
    - less bass bloat - bass still there and slightly boosted but never bloated or overbearing, impactful and dry
    - midrange not as recessed, more forward, overall more pleasant
    - a lot more treble extension, lots of details in the treble you might not find in the T10
    EDIT: will add other comparisons later once I have made some head2head comparisons...
    Pros & Cons


    1. sound quality 
    2. comfort
    3. soundstage
    4. crazy versatile bass (with no bloat)
    5. high build quality, feels like it can withstand lots of abuse
    6. 3 years warranty and great customer service
    7. evolutionary step up from the MA750 and T10

    1. a bit heavier due to metal build (didn’t bother me at all but just want to mention it)
    2. no microphone i-version available yet
    3. needs some burn-in time to sound best (or brain burn-in)
    4. requires a good seal
    5. no detachable cable
    1. Comfort                       9/10
    2. Sound Quality             10/10
    3. Design                        9/10
    4. Durability                    9/10
    5. Value for Money         8/10
    Based on a price of $279 retail. 
    Quick recap of the 750 and T10: great build quality, 3 years warranty, great sounding, comfortable, great accessories from a great company. 
    The new flagship of the RHA line up delivers in spades. What I wrote in the 750 review still holds true, constant improvement and evolution is the name of the game. RHA took the best of the 750 and T10 and combined it with the T20. There is indeed more clarity and detail and the slightly flawed bass heavy T10 was tamed. Though a bit more sub bass (quality not quantity) would have been nice. The detail and clarity of this headphone is really astonishing. The treble is extended compared to the T10. Without being harsh, these are indeed better.
    In a direct shoot out between the T10 and the T20 I found the T20 to be more involving, more enveloping, with a lot more detail and clarity in the treble. They are also louder and easier to drive than the T10 however the better the amp, the nicer they sound (not referring to power). This is still not a neutral earphone but way more neutral than the T10. As Warrenpchi put it: "the most balanced RHA unit I've heard this far, by a wide margin." That's exactly what I heard as well.
    ​Used the T20 also for some X5 vs X5ii shoot out. T20 quickly became my favorite in-ear
    Since some of you asked - sound level with T10 (volume matched via iPhone decibel meter app)
    ...and here the same volume with the T20, enlarge to see the small lines I added, yellow T20, red T10. 
    Why no i version?
    That question was brought up a lot. RHA obviously thinks that people who buy a headphone like the T20 use it with a DAP and so don’t need a mic. I am not so sure. Personally I prefer not to have a microphone but I sure am in the minority. I guess an i version is in the works or at least seriously considered.   
    So…..: Yes, they are now my favorite in-ears under $300, maybe even above that price. As far as dynamic in-ears go, this could very well be the new benchmark. I used to use the 750 and T10 as well as the JVC HA-FX850, RE-400 and UE900s a lot before... but now… not so much. The T20, even after wearing off the new-toy-syndrome, is a hit. Properly driven this in-ears delivers. Well done, RHA, very well done. 
    T10 white/grey cable, T20 black cable
    Update 21st June 2015:
    Comparison to MA750:

    In the right corner, the contender, with a fighting weight of 39g, the T20, in the left corner the reigning champion, with a fighting weight of 35g, the MaaaaaaaAAAAA SevenFiftyyyyyyyyyy.
    The referee today is the Audioengine D3 24 bit DAC. 
    IMG_5181.jpg MA750 vs T20 - FIGHT!

    Observations from this comparison:
    Fundamentally the T20 with the reference filter share the same signature as the 750. They are clearly coming from the same producer, they share the "house sound" of RHA you could say.
    But to throw in a Spinal Tap reference: The T20 go to 11.
    This is what the T20 delivers above the 750:
    - more immediate sound with a wider soundstage ( bit of an oxymoron here, the sound is closer to you but the soundstage is wider, if that makes any sense)
    - more treble detail without being harsh
    - hits harder and goes deeper in the bass and sub bass
    A fuller, warmer sound with the T20s without loosing treble detail. The T20 with reference filter is an upgrade for any 750 owner. I can hands down recommend this, if it's in your budget. It's not 2 times better than the MA750 but you will have improvements in every area...it's a clear upgrade path for owners of the 750.
    Disclaimer: RHA provided a T20 for review following their launch event in Dubai. I own the MA350, 750 and T10.
      Sssss, H T T, SpiderNhan and 7 others like this.
    1. View previous replies...
    2. Yan Ovtchinikov
      Soooooo,... i went to the apple store and had a listen to the RHA T20's, really liked them, the new limited edition black model looks awesome, with the neutral/reference filter on. Bass was nice and punchy, mids with vocals nice and upfront, just how I like it, BUT as soon as i turned it up little bit more, thats where the sibilance came in with multiple different tracks playing, started sounding slightly too harsh for my taste. I know sibilance can be caused by many factors. Being a sound guy, I know it when i hear it. Sounds like a V curve for sure. The upper high frequency range was boosted, as if someone reached for the high frequency knob and turned if up a dew dB, hence the sibilance coming into effect here[my opinion]. I found a few companies in London where I can demo the ue900s, will see how they sound. For some reason I am getting the feeling that I will really like them. Plus they have 4 BA drivers so they must be dealing with each band much easier and generally sound more stable.
      Yan Ovtchinikov, Apr 2, 2016
    3. Yan Ovtchinikov
      [UPDATE] Okey, so i demo'd both ue900s and RHA T20, im happy with everything, but as mentioned, the only issue with RHA T20 is sibilance [when you go louder], with ue900's there simply isn't any, same track, same player, same day, same place.
      Yes as mentioned by everyone, ue900s sound more layed back throughout the frequency range and makes you think they sound not as good, but thats what a MONITOR should sound like in fact, well thats how i want my monitor to sound like.
      So i went one step further, got out a graphic EQ, and introduced a V curve, GUESS WHAT,....the ue900s, suddenly sounded SOOOOOOO much better, waayyyyy better and more balanced then the RHA T20, same bass thump and punch as T20, I could hear things in the mids on the ue900s that i hardly noticed in the T20 because of all the bass. Absolutely amazing, I didn't expect them to sound like that with a V curve, I thought things would get covered and muffled. Well i guess thats what 4 BA drivers allow you to do when you have them all 4 seperated.
      Yan Ovtchinikov, Apr 4, 2016
    4. BuckyOH
      Bought these after owning a pair of Fender FXA2. I was very content with the sound of them. They broke and went out of comission. Ordered a pair of beyerdynamic IDX200 first but really didn't like those. Too muddy and too little bass. Ordered a pair of RHA t20i after that and I must say after some fiddling with EQ and the filters that I'm starting to get used to them and liking them. I have to EQ as I'm listening to mp3s on my phone. Desperately need to upgrade in that department.
      BuckyOH, May 28, 2019
  3. McSchnauze
    RHA T20 – Sonic Lushness Unveiled
    Written by McSchnauze
    Published May 24, 2018
    Pros - Warm yet detailed. Lively/Energetic. Lush & Natural… almost analog-like.
    Cons - Bass can be too prominent. On most tracks, just above-average soundstage.
    This is an encouraging tale of disappointment and an anecdote of the merits of patience -- an unveiling of sound that’s rich, lush and beguiling!

    RHA T20 by McSchnauze .jpg

    I quite recently purchased the RHA T20, as I was curious about the tuning filters (Bass, Reference, Treble) and the proprietary Dual Coil dynamic driver. I’ve heard a lot of good things about their MA750 (and mixed thoughts about their overly bass-focused T10). When I first put on the T20 at the store right after purchase and played some test tracks, I had the compulsion to immediately return the item. But after mustering some courage (and faith), I decided to keep them and let them run their course. So after about a week of (brain or gear) burn in, I’ve come to enjoy these sexy & robustly built IEMs (with a bit of tip-rolling).

    For this review, I won’t go over the packaging, build and accessories (as others have done a wonderful job with that already), but will focus on the RHA T20’s sonic qualities.


    I’m a 41 year old lover of all things sonic, with some classical voice training. I compose cinematic-inspired pieces & make choral arrangements in my spare time. I enjoy listening to a wide spectrum of genres, such as classical & cinematic scores, choral music, jazz, folk, world / new age, musicals/theater, pop, rock & alternative. I prefer a relatively flat signature, with some bass enhancement (but not bass-head levels), or presentations with a mild “u” signature (not an exaggerated “v”). I don’t consider myself as an “audiophile” but I am a self-professed music lover. Despite being new to this hobby, I believe I can discern tonal & pitch variances quite accurately. Nope, I am not getting monetary compensation from RHA for this review – this is simply an exercise of sharing my auditory experience regarding RHA’s in-ear monitor, the T20, with the hope that you may find it helpful (if not, at least entertaining). Just remember – my ears, gears & sensibilities. Your tastes and perceptions would most likely vary.

    Btw, do check out some notes at the end of this review for my thoughts on burn in (gear/brain), suggested product improvements, as well as RHA’s superb after-sales service.


    For this assessment, I used my Cayin N3 (warmish neutral tonality), gain set on medium for most tracks, volume primarily at 50%. The T20’s stock “reference” tuning filter was used. EQ was left untouched. Aside from at least 100 hours burn in (brain or gear), most importantly, I also used some spare wide bore / shallow tips I had lying around. Using these tips, instead of the stock tips, the sound opened up and the bass was tamed yet still commanding, while maintaining body of the mids, as well as the treble energy. I tried the “treble” filters, but found the overall signature became too “v-shaped” for my tastes, and the “bass” filter was just too bassy for an already warm default signature. No external amp was used.

    Below are the primary tracks (FLAC) used to evaluate sonic qualities & presentation, and the T20’s delivery of certain genres, instruments & vocal ranges:

    Jupiter: The Bringer of Jollity (Gustav Holst)
    Chasing Pavements -- Live at The Royal Albert Hall (Adele)
    Marche Royale (Igor Stravinsky)
    There’s A Small Hotel (Jane Monheit – soprano range)
    Anch'il mar par che sommerga -- Bajazet (Cecilia Bartoli -- mezzo soprano range)
    Breathe Again (Toni Braxton – alto range)
    Even Flow (Pearl Jam – baritone/high-baritone range)
    Believe Me Natalie (The Killers – high-baritone/tenor range)
    If Ever I Would Leave You (Robert Goulet – low baritone / bass range).
    Kadu Buva (Kenny Wollesen, Jonathon Haffner & Dalius Naujo)
    Young Hearts Run Free (Kym Mazelle)
    Tundra (Amber Rubarth)
    Sweet Georgia Brown (Monty Alexander)
    Pretty Piece of Flesh (One Inch Punch)

    …and some other music tracks, across different genres.

    ***THE MEAT***

    So here are my thoughts about the previous flagship offering from Reid Heath Acoustics – the T20…



    Bloom. Boom. Dark. Veiled. Aggressive. Congested.

    The lows were overly dominant, as if one was swimming in sub-bass. Vocals and mids sounded curtained off. Treble sounded muffled. Gasping for air.


    Detailed. Energetic. Warm. Rich. Expansive.

    The T20 follows RHA’s V-shaped house/signature sound with a stout low-end and pronounced highs, best paired with a neutral or slightly bright/cold DAP/DAC, in my opinion. I think my initial dismay was due to the fact that I’ve been using the Fiio EX1 2nd Generation on most days prior to acquiring the T20. The Fiio EX1ii is an IEM that is generally bright and somewhat balanced, with enhanced but controlled lows, superb soundstage / airiness / imaging, and with mids & treble that I enjoy. Also, I believe that my Cayin N3 (unfortunately) adds to that already warm & bass-heavy presentation of the T20 (the N3 is slightly warm to neutral).
    So yes, the sound did take some getting used to (or the drivers have finally flexed their muscles).
    Now the T20 is more enjoyable, offering a full-bodied, richer and impactful presentation.
    The T20 is not the most revealing, but in lieu of this, it enhances the sound making even some bad recordings/mixes sound quite enjoyable. The T20 is not ideal for reference/mixing but it is definitely crafted for music enjoyment, assuming you’ve taken a liking to its type of presentation.

    Sub-bass emphasis, with decent rumble & extension – a good backdrop to the rest of the higher frequencies. Emphasized but rendered like a sonic wall at the back of the stage.
    Mid-bass is punchy and quite fast, and surprisingly doesn’t intrude much on the lower mids.
    I would have loved the lows, if they were at least 2db lower. The bass can be a little too much for my tastes, thus, I had to tip roll as I don’t like touching the EQ on my DAP. The stock narrow-bore / low silicone tips further emphasize the bass, which may suit those who want heftier lows. I chose to use my spare wide bore / short silicone tips to lessen the funnel effect and tone down the bass – the sound becoming more balanced and enjoyable!

    Male Vocals are natural and full-bodied, though very slightly recessed and can get quite drowned out on busier tracks (especially baritone/bass voices). Eddie Vedder’s vocals in “Even Flow” was well rendered with ample grit but a little less so compared to how the Audiofly AF56 or iBasso IT03 does it. Still, alternative rock/grunge sounds great on the T20! Robert Goulet’s rendition of “If Ever I Would Leave You” was simply sublime, with sufficient body, emotion and warmth!
    Lower Female Vocals are more forward, slightly dry yet natural sounding – Tony Braxton’s vocals in “Breathe Again” had an enticing warmth & heft to it! Higher Female vocals have better imaging and ample airiness, and carries over some warmth of the lower registers, resulting in vocals that sound fuller despite the higher pitch.
    Good transience and micro-detail retrieval for instruments such as trumpets, horns, guitars – as long as the track does not get too busy.

    Lower treble is prominent with decent clarity & detail retrieval, giving it energy & character. Violins are energetic, forward and detailed enough yet sound ever so slightly smoothed over. I actually find this treble rendition as one of the T20’s charms – energetic yet not grating! Btw, I could handle pronounced treble, so YMMV.
    Upper treble extends quite well. Cymbals and high hats have good shimmer without becoming splashy, though sound slightly fuller than they should. Sibilant-prone tracks are not as sibilant, due to the overall darker / warmer character of the T20.

    Quite intimate compared to the superbly staged Fiio EX1ii and the iBasso IT03, but still above average. However, I occasionally get surprised with the T20’s soundstage rendition – it can sound expansive, depending on the track (resolution, mix/mastering, etc.). The T20 has ample width, closely followed by height, and some depth. It has enough air, but is not as airy as the offerings from Fiio and iBasso. However, the T20 can still deliver exceptional directional queues, positioning & holographic effects despite its more intimate soundstage. Things can get quite claustrophobic on very busy tracks, due to the overall warmth – however, it barely shows distortion even in louder volume settings (an interesting finding!).

    The T20 is quite easy to drive (16 Ohm impedance with 90dB sensitivity) on my Cayin N3 with volume averaging at 50% on medium gain. Its frequency range of 16-40,000Hz does hint at the impactful presence of lows & highs. It has an almost black background and an unnoticeable driver reflex (if any).

    As of now, I don’t have other gear in the same price range to directly compare with the RHA T20 (purchased at approximately US$200).

    So I’ll just make comparisons with some of my other IEMs:
    Vsonic GR07 Classic Edition (approx. US$100)
    iBasso IT03 (approx. US$300)
    Audiofly AF56 (approx. US$100)

    Hopefully these comparisons will help you get a better idea of the sound virtues (and cons) across the budget/entry/mid-level price ranges. Just note that the aforementioned prices were as of time & location of purchase.
    Comparison Guide:
    > is defined as “more but just by a little compared to…”
    >> is defined as “very perceptible variance; obvious difference”
    = is defined as “equal to; same as”

    *By the way, even if a certain IEM is positioned at the last rung, it doesn’t mean that that particular quality is absent or lacking, as it can still be average / above average. I will call it out if the model really suffers/shines immensely in a particular aspect.

    So here are the gears stacked against each other, exemplifying certain qualities, from the most to the least:

    Neutrality = GR07 > IT03 > AF56 > T20
    Timber/Naturalness = T20 > IT03 = AF56 > GR07 (upon further listening, I realized that the GR07 is the least natural sounding among this roster. However, the GR07 still has good timbre and doesn’t sound too digital / artificial / metallic, albeit sounding ever so slightly nasal in certain vocal renditions, compared to the other three)
    Detail/Resolution = IT03 >> AF56 = T20 > GR07
    Airiness & Clarity = IT03 > GR07 = AF56 > T20
    Imaging & Positioning = GR07 = IT03 > AF56 > T20
    Soundstage = IT03 = AF56 > GR07 > T20
    Dynamics = GR07 = AF56 > IT03 > T20
    Transience = IT03 > AF56 > T20 = GR07
    Bass Quantity = T20 > AF56 = IT03 > GR07
    Bass Quality = T20 = AF56 > IT03 > GR07
    Mids Quantity = GR07 = IT03 > T20 > AF56
    Mids Quality = T20 = AF56 = IT03 > GR07
    Treble Quantity = T20 = IT03 > AF56 > GR07
    Treble Quality = IT03 > T20 = AF56 > GR07
    Amount of Sibilance = GR07 = AF56 > IT03 > T20 (based on first listen, but all have tapered down after ample burn in, and clearly, the T20 wins here!)
    Comfort = T20 > GR07 >> IT03 > AF56
    Apparent Build / Durability = T20 >> IT03 > GR07 > AF56
    Immersion / Engagement = T20 = AF56 = IT03 >> GR07 (the GR07 is the most neutral of the four but still manages to be engaging. But the other three models have the upper hand with their own unique form of immersive presentation.)

    CLASSICAL/LIVE = IT03 > AF56 = GR07 = T20 (the enhanced lows of the T20 and AF56 balance the typical treble-centered classical genre, while the GR07 allows most, if not all, the voices & instruments to clearly assert themselves)
    ALTERNATIVE/ROCK= T20 > AF56 = IT03 > GR07 (the T20 really shines here, though the IT03 & AF56 are not very far behind!)
    R&B/JAZZ = T20 > AF56 > IT03 = GR07
    POP/EDM = IT03 = T20 > AF56 > GR07


    The RHA T20 is a commendable all-rounder and a good day-to-day music companion, excelling in studio-produced tracks (alternative, rock, EDM, pop), and genres that call for more pronounced lows. It’s satisfying enough for live or concert hall recordings that demand impeccable imaging, clarity and soundstage, while giving an entertaining and exceptional low-end balance to treble-focused genres such as classical/orchestral. The T20 is a looker with a luscious pebble-like solid steel injection-molded housing. It feels robust, with RHA’s standard three-year warranty adding to that confidence. Although the T20 can improve on staging, it delivers a cohesive sound with its Dual Coil dynamic driver. If you’re used to cold / neutral / flattish IEMs and are seeking an exciting yet warm signature, natural (almost analog-like) timbre and a robust bass, the T20 is certainly a viable option. What began as a dark & lackluster experience transitioned into a tale of delight, with Reid Heath Acoustics’ T20 eventually unveiling its charms – an immersive, lush and full-bodied life-like sound for sheer musical enjoyment! :)


    Aside from the sexy & robust metal housing, and lively sound, I purchased the T20 due to the generous 3-Year RHA warranty. When my cable had some problem (it happens to the best of us) and the local retailer was less than engaged with my problem, I emailed RHA directly and they responded and acted fast, sending a replacement unit immediately. Thus, it’s easy for me to recommend the T20, and RHA as a company – buy with confidence!

    2) BURN IN
    I’m still on the fence regarding burn in. Do small transducers, particularly Dynamic Drivers, really change their sonic renditions in time, or is it just my brain becoming accustomed to the sound and/or has become selective to the presentation and frequencies to create a more enjoyable listen? Frankly, there’s not much change in my other IEMs after ample burn in, but with the RHA T20, it’s quite a "night & day" difference! So whether the T20’s dual-coil dynamic driver really flexed itself to sound better through use, or my brain and ears simply adjusted, I would still recommend these IEMs for that lush and natural sound (albeit sometimes too powerful bass).

    I think RHA has something nice going on with the T10 and T20, particularly with the tuning filters. The T20 is simply bass-abundant, so whichever filter you use, the lows would still assert their undeniable presence. It would be nice if RHA could create some tuning filters that really enhance the mids (making them more forward) or one that truly tones down the bass. The over-ear hooks' sheathing could be improved, too, as they have started to crinkle a tiny bit. Length of the wire/cord could also be reduced for more manageability. But, please, do keep using that sexy injection molded stainless steel construction (which is surprisingly light!) to maintain the robust and premium feel of your products, as most plastic/resin housings can feel quite, well, inexpensive. Replaceable wires/cords would also be a nice touch, to lengthen use and enjoyment of RHA IEMs.
      Wrathbringer27, voxie and DoctaCosmos like this.
    1. View previous replies...
    2. McSchnauze
      @svk7 The more I listen to the T20s, I noticed that the bass is not as overwhelming, the treble has become more articulate, the mids still amply bodied with much less veil. I think that there was less of a discrepancy/transformation of sound with the replacement unit as my subconscious had perhaps retained the signature (from the original unit), (taking my cue from @HeartOfSky ) -- a case of timing & sonic relativity (or memory, if you'd like).
      McSchnauze, May 27, 2018
    3. McSchnauze
      @svk7 After the burn in of the replacement unit, I'd say there is still a perceptible difference (bass quantity, clarity, treble quantity, etc.) but less glaringly so. But if you're asking me if it's true mechanical flexing or simply ear/brain adjustment, I am still bewildered (perhaps you're right -- 99% brain, 1% mechanical). I'm just happy that I get to immensely enjoy the T20s now, as a good complementary piece to my other IEMs (I've been using it daily, as of late).
      McSchnauze, May 27, 2018
      svk7 likes this.
    4. DoctaCosmos
      Oops I did mean ma750. The hooks don’t help. It’s the just the shape of the housing itself is horrible imo.
      DoctaCosmos, May 27, 2018
  4. Cinder
    Fun, Versatility, and Steel
    Written by Cinder
    Published Sep 27, 2016
    Pros - Excellent bass, premium feeling, good strain relief, good filter system, good memory wire, detailed treble
    Cons - Some build "fit and finish" issues, no genuine Comply



    RHA is an interesting company. It has forged its own place within the audiophile world, making a name for itself based on the industrial design language of its products and the generous duration of the warranty that accompanies them. Today I have the privilege of reviewing the T20, RHA’s former flagship IEM. While it’s no longer the pinnacle of what RHA has to offer, it’s certainly still worth taking a look at.
    You can find the T20 for sale on RHA’s official website here, for $240.
    Disclaimer: This review is based upon a sample unit provided to me by a manufacturer or distributor in exchange for my honest opinion and un-edited words. I do not profit in any way from the writing of the review. I would like to thank Marina and Caroline at RHA for sending me this review unit.
    Preference and Bias: Before reading a review, it is worth mentioning that there is no way for a reviewer to objectively pass judgment on the enjoy-ability of a product: such a thing is inherently subjective. Therefore, I find it necessary for you to read and understand what I take a natural liking to and how that might affect my rating of a product.
    My ideal sound signature would be an extended sub-bass with a leveled, but textured, bass. The mids should be slightly less pronounced than the treble, but still ahead of the bass. I prefer a more bright upper range.
    Source: The T20 was powered like so:
    PC optical out-> HifiMe SPDIF 9018 DAC 3.5mm out-> earphones
    AP100 3.5mm out -> earphones
    All music was served as MP3 @320Kbps or as FLAC.

    -Sound Signature-​

    Initial Impressions:
    Silver/Reference filter: Treble has a notable presence. It is transparent, but not biting, raw, or sharp. Mids aren’t too far back, and are rather dynamic within the mix. Bass is slightly boosted, giving the low end of the spectrum a nice weight to it.
    Gold/Treble filter: While the treble filter doesn’t actually decrease the amount of bass being produced, it does make it feel less forward by boosting emphasis to the treble and upper mids. This boost does make the T20 feel a little more precise, and opens up the sound a little bit more. It does not, however, make the treble sibilant or sharp. As a side effect, mids are also slightly pushed back.
    Black/Bass filter:
    The black filter adds a notable amount of sub-bass, with a slight boost to mid-bass. This makes drops deeper, drum kicks harder, and classical concerts more sonorous. While still not at bass-head levels of bass, the T20 does do a good job delivering in both quantity and quality of bass using the black filter, more so than many “warm” and “bassy” IEMs in this price bracket.

    RHA’s official frequency response graph for the T20.​

    Unless otherwise stated, the statements made in the following sections are made with regards to the neutral (silver) filter.
    Treble: Songs used: White FlagMidnight CityOutlands
    As I’d mentioned earlier, treble is quite nicely placed. It is very transparent and well-extended. Impressively enough, it is also very much not sibilant, sharp, or raw, instead adopting an bold, yet respectful presence. This manifests itself as a good level of retrieval and micro-detail placement in songs like White Flag. Treble layers well, and has it’s own dynamics and depth to it. Outlands fairs just as well, as the T20 does a very good job creating a sense of air, separating out the violins well from the rest of the song.
    Hi-hats decay well, and don’t smudge too much into the rest of the upper register.
    Mids: Songs used: Flagpole SittaJacked UpI Am The HighwayGood Life
    Evaluating the mid-range of an IEM is more often than not my favorite part of my reviews, and the T20 feeds my interest well. My songs really do come to life on the T20, as each instrument is distinct, with its own position and depth, which is likely due to the airy feeling the T20 gives to many songs. Interestingly enough, the T20 does not seem to have a large spike around the 1–2KHz range that many IEMs use to boost vocal resolution and clarity. While there is certainly a climb from 1–2KHz up to 5Khz or so, such a incline gently moves the vocals forwards, without making them too commanding of the song.
    Bass: Songs used: LightsGold Dust99 Problems (Hugo Cover)Leave Me
    Even with the reference filter, bass is not at “reference” levels of emphasis. Instead, RHA chose to give the T20 a small boost in mid and sub bass. While audio purists may disagree with that choice, I actually quite enjoy it. It allows songs like Lights to have a very satisfying level of depth and body, without causing songs like Gold Dust and Leave Me to become boomy and messy. In fact, the reference filter still manages to give said songs a meaty bass drop with some excellent sub bass extension.
    Clarity: Songs used: ThroneMap of The ProblimatiqueI’m Not Alright
    The T20 is developed using RHA’s proprietary “dual coil” dynamic drivers. While this may sound fancy (and likely is in practice), the theory behind it isn’t too complex. The “dual coil” refers to a 2-in-1 driver that’s split the transmission coil of the dynamic driver into two separate rings, allowing the driver to divide its workload among the two coils. Thusly, it functions as if it had two dynamic drivers inside, while maintaining a size close to that of single dynamic driver. This technology does show itself when the T20 is pushed quite hard, and it shows itself well. The T20 handled Throne without problem, as it did with I’m Not Alright. No distortion, no noticeable smudging. There was, however, a small amount of lost micro-detail, which is to be expected.
    Sound Stage
    Sound staging is precise. So precise, in fact, that I had what I’d consider to be my first true “3D” sound space experience with it during the intro of Soldier’s Poem by Muse. But further than that, as I’d mentioned earlier in my review, the T20 does a wonderful job creating an airy and spacious stage for the instruments of my songs to play on. Classical songs can take on a symphonic feeling, punk vocalists can scream their hearts out right next to you, and electronic bass drops can immerse you in the chaos that is the modern EDM scene.

    -Packaging / Unboxing-​

    My apologies for the slightly rotated pictures, as the rock I was taking pictures on was not flat.





    Construction Quality
    RHA did a very good job making the T20 feel sturdy and premium. The polished stainless-steel driver housings look like little metallic jewels, and have a satisfying clack when bounced against one another. The driver housings look to be comprised of two metal parts, joined at a seam roughly in the middle of the housing. While it’s an impressive feat, there seems to have been a slight misstep along the way when my particular unit was manufactured. The seam of my left driver housing is wider than the one on the right driver housing. My suggestion to RHA is to try an make the seam less noticeable, as it would greatly enhance the premium look and feel of the T20.
    However, for those of you who are nervous, fear not. RHA has great customer service and a heft 3 year warranty on their IEMs, so they’ve got you covered.

    Look at the difference in the width of the seams!​

    The cable is made from the typical RHA rubber, but is actually less finicky than the one used on the MA750i, which is a big plus for me. However, it is still quite bodied, and as such, is hard to coil up neatly. Luckily, the included carrying case is large enough to account for the cable’s bad manners.


    The T20’s cable terminates in a gold-plated 3.5mm jack, and is protected by a spring. This gives the T20 (and most other IEMs made by RHA) an industrial, but still premium, feeling. It’s not just a fancy gimmick either. The spring, as well as all the other stress relief systems on the T20, do a very good job protecting the cable from day-to-day mechanical stress.
    While my unit does not have inline controls, RHA sells a version that does for $10 more called the T20i.

    Comfort is highly subjective. Everyone has a different bar that an IEM must reach in order to be deemed “comfortable”. Therefore, all I can say is that this section may not be representative of your experiences with this product.
    I find the T20 to be quite comfortable. The insertion depth of the nozzle is farther than the MA750i, and is a little longer than most IEMs I own in general. This lets me get a pretty good seal, even with the stock silicone. The shape of the T20’s driver housings is quite ergonomic, and doesn’t even feel like it’s there most of the time. The cable’s memory wire is also quite good, having an almost perfect balance between pliability and stability. It’s far superior to the implementation of memory wire on the MA750i.
    The memory foam eartips were, however, not very usable for me. It appears as if RHA chose to use generic memory foam instead of genuine Comply eartips. I had a hard time achieving any reasonable insertion depth with them, and found them generally uncomfortable.


    In typical RHA fashion, the T20 comes with a plethora of eartips all placed neatly on a stainless-steel plate. A variety of nine extra sets are included, which encompass standard silicone, double flange, and memory foam eartips.
    I am confused as to why RHA chose to include these particular memory foam eartips, which are not genuine Comply, when lower tier IEMs in RHA’s product line, such as the MA750i, include eartips that are either genuine Comply, or very convincing generic versions. It’s pretty disappointment for me, as I absolutely love memory foam eartips.

    I mentioned earlier that the T20’s case is large enough to fit the unruly rubber cable permanently attached to the T20’s driver housings in it with no issues. Furthermore, there is plenty of space to throw in some extra eartips or the metal filter holder. As an added bonus, the case is a perfect fit for the Hidizs AP100, my current mobile workhorse.


    The T20 is a versatile, premium IEM. While fit and finish could use a little work, the T20’s sonic prowess is notable for its price. Listeners looking for a stylish, durable, and comfortable IEM with a small amount of bass emphasis should find great solace in the T20’s warm aural embrace.
      Rewkie, B9Scrambler and Light - Man like this.
  5. lin0003
    True Flagship Quality
    Written by lin0003
    Published Sep 22, 2015
    Pros - Design, Sound, Filters
    Cons - Isolation
    First of all I’d like to thank RHA for sending out a unit of the T20 for us to do an Australasian tour. RHA is a company that I am quite familiar with now, having tried their other two previous flagship IEMs. The MA750 was the first RHA product I tried and I was very impressed by the build and the sound that it put out. However, their last entry into the mid-range market, the T10 left me wanting a lot more as far as sound went. It was overly bass heavy and I noted that they needed a more “reference” reference filter.  
    The T20 is the successor and the new RHA flagship and is supposed to incorporate the suggestions that came from the T10 and pick up from its mistakes. I had very high hopes for the T20, and I loved the design aspect of the T10, so was happy when I discovered that the T20 would have the same design as the T10. RHA is known for the build and meticulous attention to detail of their IEMs and the T20 certainly continues that trend.
    The T20 is priced at $240 in the US and this slots perfectly into the mid-range of IEMs. This is a price bracket which I feel has the best money to sound ratio and going into the high end market will cost considerably more with little return. The competition over here is very stiff and I was curious as to see whether it would knock off the DN-2000.
    **Disclaimer** These were provided by RHA for a tour in return for an unbiased review.

    Unboxing & Accessories

    The packaging is classic RHA again and it certainly looks very well presented. The box shows off the many features that it has and it showcases the red dot design award that it received. It tells you on the front of the box that it comes with a three year warranty, compared to the one or two that most other competitors offer. Opening the flap will reveal a graph with all three of the tuning filters and there is a clear plastic window where you can see the T20 along with the tips and filters. Good presentation and the packaging survived the tour rather well, so it seems unlikely that it would get damaged in transit.
    The T20 certainly comes with a ton of accessories. It has a lot of tips including foam ones so everybody should be able to find a comfortable fit easily. The tips are all on a metal plate, just like the other RHA IEMs and this is a really nice design IMO. There are 3 tuning filters, which is one of the selling points. The change is not all that large between each of them, but it’s not exactly subtle either. The case is also the standard RHA leather case and it serves its job very well, but it would maybe be nice to see something that it more protective. There is also a cable clip and a manual. Overall, this area is good just like all of their other IEMs.

    Design & Isolation

    The physical presentation of the T20 is amazing, it is the same as the T10 except it has a vent on the face. The brushed metal looks excellent and it is very well built. The build is also very impressive, all the seams are very tight and the earpieces just feel very well built. They do scratch quite easily though, so be careful with them. The entire housing is made of brushed stainless steel and is very well finished. The left and right side are colour coordinated, which is a nice touch. The shape also fits very well in my ear and it is shaped like Shure or Westone IEMs. Seal was a little hard to get with these with the stock tips, but I think that might just be my ears and not the T20.
    The cable is awesome just like the T10. There is no remote on the T20, but I’ve heard that RHA are going to come out with a T20i, which is the version of the T20 with a remote and mic. The memory wire, just like the T10, is ever so slightly too long and it goes a little past my ears. The cable feels very solid and is just the right thickness and still remains flexible. The jack has a good strain relief, but it’s is really long and it is probably just a little too intrusive. It would be nice to see a more low profile strain relief.
    Isolation is probably a little under average for these, the vent really doesn’t help isolation too much. In relatively quiet areas, the T20 has no issues, but in noisier public places the T20 may not do a sufficient job at blocking out sound. It’s not bad, it’s just not that great. Listening to this while I am typing this review, I can hear my mechanical keyboard quite clearly.

    Testing Gear

    I tried the T20 with a range of sources and I discovered that it actually scales quite a lot, more than the price would suggest. The best pairing I found was the iBasso stack that I have been pairing with the 1plus2. I used it with the D14 as a DAC and the P5 as the amp. I felt like this really brought out the dynamic sound of the T20, and made it sound more alive than from other sources I tried. The DX90 was quite a good pairing, but it didn’t drive the dynamic driver with the same authority that the P5 had. I tried with the iPhone 6 and the Xperia Z2 and they sounded really poor, lifeless and quite dull, I would really recommend pairing these with a high end source, because they really need something good to shine. I also decided to use the treble filter for the review, because I found that it was the more natural sounding filter out of all the three options.  


    Just a word of warning, these require burning. RHA sent them to me first and out of the box I was really disappointed. Upon hearing them, I felt like RHA still hadn’t addressed the issues that plagued the T10 – bloated bass, overly warm sound that lacked clarity. However, after it did the rounds around Australia and New Zealand, I was actually really impressed with the sound and was shocked just how much it had changed. So when you just get them, don’t judge them straight away. I’m not sure how many hours the T20 had gone on the tour, but I’d say to burin them in for around 200 hours before judging them.


    Like I mentioned before, I used the treble filter to assess the T20 and I’ll give a short comparison of what the other filters sound like. The reference wound is bass heavy and is a little less treble happy compared to the treble filter. However, with the treble filters, the bass also seemed to decrease. I’m not sure if this was actually the case, or whether the increase in treble gave the impression of reduced bass. The bass filter was not great IMO, it increased the bass from the reference filter, which was already a little too heavy to start off with, so unless you are a basshead, I wouldn’t recommend going anywhere near the bass filter.


    The bass was pretty much what I expected TBH. I knew that RHA are a somewhat bass heavy company and all of their IEMs that I have tried are all somewhat bass heavy. The T10 was overly so, but the T20 certainly takes a good step back and it is nowhere near as bass heavy as the T10. The bass is strong, but feels rather controlled and is not bloated whatsoever. There is a little bit of boominess, but it is not to the point where it bleeds into the midrange and it is actually rather pleasant. I find myself reaching for the T20 over my other IEMs when I am looking for a bit more of a bass response. Detail is quite good, speed is obviously not great, but this is the trade-off for a bass heavy IEM. Extension is quite good, but not the best I have heard in the price range. There seems to be a bit of sub-bass roll off and the bass hump sounds like it is in the mid-bass. Bassheads will love this.


    The midrange was probably the area that came as the largest shock of all. It is very clean and crisp, not warm or tinny at all like the T10. The midrange actually sounds like it some from a BA driver and not a dynamic driver. The clarity that is has is excellent, on par with the DN-2000, and I’m very surprised that it manages to do all of this with a single dynamic driver. It is probably one of the cleanest sounding midranges from a single dynamic driver IEM. I felt like the tonality of these with the treble filter were perhaps just a tad bright, but they are by no means cold at all. With the treble filter, it is a little recessed, but not overly so, they are just a little laid back. Instruments have a natural timbre to them. Vocals are excellent, they sound very natural and they sound very clear due to the tuning.


    With the treble filter, obviously the treble is more boosted than the reference filter, but it sits right in my sweet spot – it is almost perfect for my preference. I like treble to be slightly elevated and the T20 with the treble filter is exactly that. With the reference filter the treble was quite neutral. The upper registers have slight roll off, even with the treble filters, but it doesn’t really affect the sound much. Cymbals are excellent and they have a very natural tone and sparkle to them. There wasn’t any sibilance, but I’m not very treble sensitive so I guess this can change from person to person. Detail is excellent, not quite as good as the dual TWFK of the DN-200, but it holds its own well. The treble sounds excellent with the treble filter, it really showcases the ability of the T20.

    Soundstage & Imaging

    The soundstage on these is rather large, both wide and tall. It certainly challenges the DN-2000 and perhaps even betters it in this regard. The soundstage seems much more expansive than the T10, which is nice. The width especially was impressive, it was considerably wider than the DN-2000, but obviously doesn’t reach the levels of the 1plus2. Height is good too, it gives the entire presentation a concert hall sound. However, something that could perhaps be improved on is the depth, it wasn’t quite able to keep up with the DN-2000 and as a result, the DN-2000 had a more 3D soundstage. The T20 is very impressive in this areas.
    The imaging is on par with the soundstage, they are both very impressive. While it isn’t as pinpoint as the TWFK hybrids that I have heard, it does superbly for its price point and its single dynamic driver produces a very accurate and clear stage. It doesn’t do layering quite as good as the DN-2000, but it is still very good. It is very easy to tell where instruments are even when the stage gets quite crowded. Overall, the T20 is very proficient in this area and passes with flying colours.

    Separation, Detail & Clarity

    The T20 is also very goods in separation despite its single dynamic driver. It fares well on congested tracks and background instruments are not masked by the main ones even in complex passages. It doesn’t quite do as well as the dual TWFK in the DN-2000, but it holds its own well. It is certainly a huge upgrade over the T10. The T20 is up there with the best in this area, but it doesn’t quite match the DN-2000.
    With the treble filters, the T20 is actually a really detailed IEM. I wasn’t expecting the T20 to be as detailed as it was, having heard their past 2 flagships. They were both warm and that blurred out details. However, this is not the case with the T20, and it is a very detailed IEM, but falls short of the best of the BA IEMs. TWFKs simply are more detailed, but for a dynamic in this price bracket, the T20 is excellent.
    While the T20 isn’t as cool as the DN-2000, it is about as clear as the Dunu. The bass response is boosted, but this doesn’t really affect the clarity. Everything sounds sharp and clear without seeming artificial. The decay is very realistic and natural, the timbre is just right. Both vocals and instruments are all very well balanced. The T20 is superb here, it manages to have great clarity while still sounding natural.


    The T20 with the reference is the perfect IEM for a moderate basshead, who likes their bass, but also looks for clean mids and treble. The reference filter is great for people who just was a more V shaped sound. The T20 is a very versatile and the filters allow people to select the tuning which they prefer the most. It is an excellent choice and stands alongside the DN-2000 as an IEM between $200 and $300 that I would happily recommend to others. The T20 really does stand out from the crowd with its design and energetic sound signature.
      McSchnauze and Jeff Y like this.
    1. earfonia
      Though I disagree on the sound quality assessment, I do admire your pictures in this review. Really nice and well taken! Well done!
      earfonia, Sep 22, 2015
    2. meringo
      ugh... reviews like this are making me want to re-order. I bought, and returned, being incredibly disappointed in the sound quality. Bloated bass, and edgy highs. From nearly everyone I've talked to about this, they mention that burning in is a requirement.
      meringo, Sep 22, 2015
    3. senorx12562
      Nice review, thanks. I bought a pair of the t10s, and could only get on with the treble filters, but found they didn't improve with more time, so they ended up being just a little v-shaped for me. Gave 'em to my edm/rap listening son (with the bass filter already installed of course). He loves them. Good to hear that they have improved on them for old guys who have lost a little HF hearing. They sure look good, too.
      senorx12562, Sep 22, 2015
  6. Tom22
    Superbly Built, Re-Tuned,Round 2 is a Great Success for RHA's New Flagship! + Comparisons!
    Written by Tom22
    Published Sep 20, 2015
    Pros - Plethora of Accessories, Robust build, Ergonomic, Bassy, warm sound, good detail, Filters Tuning System
    Cons - very long cable, nozzle could be angled slightly towards 45 degrees, on the pricier side
    What do you think of when you hear: injection moulded stainless steel housing, dual coil drivers, interchangeable tuning filters, and a 3 year warranty.
    The RHA T20 is the probably the only earphone with this mix of characteristics.   At first glance, the T20 appear awfully similar to its sibling the T10.  I thought the same way when I finally saw pictures of them, there seems to be very little differences, aesthetically anyway.
    However, it seems that RHA had been listening to the feedback  they received from the T10 and upped the ante with the T20, by implementing a “dual coil dynamic driver” (aimed to better separate the bass, mids and treble), in addition to all the goodies that was already present on the T10.
    Despite the beautiful craftsmanship and accessories of the T10, the sound of the T10 had generated mixed responses from many users on head-fi and beyond, especially being premium, luxury product at the price of ~$199.
    Lets find out, if its strike 2 for RHA or have they hit homerun with the T20s.
    Disclaimer: As with every review, price is always in consideration when rating and commenting about the gear I am reviewing. I want to thank RHA and nmathesis as well as all my other peers on head-fi for making this T20 tour possible. I’m very glad to be a part of the North American Tour for the T20.
    Below is my Full video review over on youtube of the T20 and my T10i review for reference. (i have also included my comparison video of the T20 vs T10i as well). Enjoy!
    The T20s come with an abundance of accessories, and for good reason considering, it’s a premium product commanding almost a $300 price tag.  It comes with:
    3 interchangeable filters (bass- black, reference-silver, treble-gold)
    A Metal Platelet  to display the above mentioned filters
    6 sets of single flange (of the hybrid variety, in various sizes)
    2 sets of biflanges (2 sizes)
    2 sets of foam tips
    An elegant metal frame to hold the included eartips
    A large zipper carrying case (to store the earphones and all the eartips)
    A clothing clip
    An Exceptionally Long standing 3 year warranty.
    Summing up, theres not much more you can really ask for in terms of accessories, the T20s have certainly impressed me with the amount of goodies it comes with.
    Overall: 10/10
    Build quality:
    The T20s are built simply superb. The injection moulded stainless steel earpieces have a very robust quality to them, they are quite heavy, on display is beautiful craftsmanship and a luxurious feel.  Moving down toward the cables, the T20s have a black, medium-stiffness memory wire, to help prevent the cable from flopping around, especially since the cables are on the chunkier and thicker side. The cables impress and provide assurance that the T20s will last for a long time, even under the most active and rigorous conditions (I honestly think they can be a used a rope to harness your bikes to your car on road trips). The drawback of this thick cable is the additional weight that comes with, making a bit cumbersome and noticeable when turning your head quickly.  
    The headphone jack terminates in a straight angle jack with a long spring acting as as a strain relief. Personally, I would have liked to see a small, compact L shape/90 angle plug with a shorter strain relief section to help assist in portable listening environments.
    Overall: 10/10
    The way the T20s were designed and with the addition of memory wires, signal that the T20s were intended to worn cable up, helping to to minimize cable noise.  I found the comfort to be above average, despite the slightly larger, “tubbier” housing. This is mostly due to the very smooth housing, that convey a sort of “organic” shape.  I found sleeping with them quite comfortable, I was able to lie on my side in bed with them, and because their so solidly built, I’m wasn’t afraid of waking up to broken earphones, considering I toss around in bed quite a bit.
     In retrospect, my outer ear did get a bit sore after 2-3 hour session; I suspect that may have more to do with the angle of the nozzle then anything else. I would prefer a nozzle that is angled about 45-60 degrees as with its competitors. Overall, in terms of ergonomics, I felt RHA has done a fine job.
    Overall: 8/10
    In my short time with them, unfortunately, I wasn’t able to use really put the T20 to the test on public transit and the like. However, in my general use, (around the house and around the neighborhood and mall), I found the isolation to be above average, despite the vent/mesh on the face of the earpieces.
    Overall: 7.5/10
    Sound (In general terms)
    The RHA T20, is an essentially a re-tuned, and I consider “better tuned T10”.  In my opinion, I felt T20’s sound is what the T10 should’ve been. But in my conversation with nmathesis, we agreed that the T20 came to fruition only because of the feedback from the community and consumers alike from the T10s. Well, if that’s the case, I’m happy camper.
    So, lets get down it!
    The T20’s general sound signature stays true to their house sound, a textbook “V shape sound signature”, that’s warm, and bassy with a crisp treble that works well with today’s modern music.
    Filter system:
    **In my conversations with RHA, I was able to confirm that the T20s have the same tuning system as the T10i.**
    I will summarize the sound signature of the T20 below, the filters do alter the sound (but it’s more of a tweak, rather than 3 completely separate earphones).
    Bass- The bass is impactful albeit a bit on the slower side, but attention grabbing, quite satisfying bass. It impress you with the amount of bass those dual coil drivers can generate, more so then the detail and the texture. The bass has more emphasis in the midbass, with a bit of bloat, but is compensates with great definition down into the sub bass as well. This makes the T20, fun but not an overwhelming bassy experience. I think this bass boost if very appropriate if your using them during your commute to help cut through the rumbling and shuffling in loud noisy environments. (If this doesn’t sound like its enough bass for you, skip down to the bass filter section).
    Midrange- The midrange does take a small dip, but is quite competent, clear. While a doing good job sounding  clean, and natural, (good detail in conveying the texture and characteristics of voices). However, obviously it wasn’t tuned with classical or acoustic pieces in mind, instead it chooses to excel in genres such as pop, and electronic music. That said for as bassy earphone, I’m very happy with the midrange performance of the T20. The Reference filter helps accentuate conveys the most “natural” sound of the bunch. (skip to the reference filter section below).
    Treble- The slight dip in the midrange climbs up in the upper midrange to the lower treble, giving more life and energy, giving tambourines, and chimes a “clean” sort of metallic/shimmery texture.  The top end extension is good, but I feel its missing that extra little bit of “air” needed to really take the T20s onto another level. (If you want more treble extension and sparkle see the Treble filter section below).
    Favorite Filters Ranking:
    #1 Treble filter sound
    They open up the RHA house sound, which makes the sound leaner, which I think is a good addition considering I find the T20s can get a bit congested at times with the other filters (the Treble filter is stark contrast compared to the Bass filters). The treble gets a bit more shimmer and extension, and allows female vocals to gain more energy, but at times I can see that it can be interpreted as maybe a bit thin or brash. I think it could use a bit of tightening up here (maybe a bit of dampening), however it’s the liveliest sounding of the 3 filters. The treble filter just edges out the reference filter as my favorite filter.
    #2 Reference filter
    I quite like the tuning with the reference filter; the tonality is spot on for a bassy earphone. I could use a bit less bass however, as I felt that it can get a bit too thick in the mid to upper bass, causing a bit of smearing. The reference filter is probably the filter with the widest appeal (don’t let the word “reference” fool you, they’re anything but flat or neutral sounding).  The reference filter is probably the most natural sounding of the bunch and that’s why I slotted them at a firm #2.
    #3 Bass filter
    This is where bassheads unite! The bass filter on the T20 I find is more likeable than the T10i with the same filter. The bass here does reach basshead levels and its very chunky and very chesty, and it does dominate the sound signature as expected.  This filter is a great option for the average consumer who wants big bass punch with a rolled off treble.  For me however, I found the Bass filter to be my least favorite of the bunch, it felt too bloated to my ears, and due to the rolled off treble, caused it to sound dull and overly dark.  
    Comparing the Brainwavz S5 with RHA T20 (with Treble filter)
    The T20s have a more refined sound overall, the bass more even (less midbass bloat), and hits lower. The treble is cleaner, refined as well, it also has less veiling in the upper midrange. Soundstage-wise, it’s more well rounded, where as the S5s are wider in terms of left and right then height.
    Comparing to the Yamaha EPH 100 with the RHA T20 (with Reference Filter)
    The tuning here is more similar, with more bass punch on the T20s, whereas the EPH 100 has more defined and extended treble, revealing the finer details.  The biggest difference between the T20s and the EPH 100 lies in terms of their physical build. Where the EPH 100, sorely disappoints with a thin, fragile cable, with long but flimsy strain reliefs. Whereas the T20s, look like they can withstand the heavy abuse squashed under a backpack full of heavy textbooks.
    RHA T20 Bass Filter with RHA T10i with Bass Filter
    This is a direct comparison between the current and former flagship from RHA, with the same filters. Listening to songs like  “Let’s Go by Calvin Harris Feat Ne-Yo”, and “ Party Rock Anthem by LMAO, the T10i will give that boomy, chesty bass bump, but I felt the bass suffered from some smearing and can sound one-note.  In terms of the bass, I found the T20 to be tighter, with the edge in terms of scaling. Also, the T20 trades off some of that bass found in the T10is for a bit more upper midrange-lower treble, giving those synths more liveliness. Both earphones are polite, and dark sounding, so they good choices for the treble-sensitive bassheads out there.
    Overall: 8.5/10
    In conclusion, while the price tag of $249 is not what many attribute as being a “budget” product. The T20 is not really targeted toward that demographic. For a mid-high tier product, the T20 packs a lot of desirable features (robust steel housing, ergonomics, and sound) in a relatively compact package.  Personally, I would be more comfortable seeing the T20 in the $170-200 price range, but it’s an earphone I can very comfortably recommend if you have the extra cash to splurge.
    Overall Rating: 44/50= 88%
      McSchnauze likes this.
  7. dweaver
    Take 2 on an impeccably designed IEM with a decidely more audiophile tuned sound and technically improved driver
    Written by dweaver
    Published Aug 3, 2015
    Pros - Wonderfully made IEM that is comfortable and built like a tank. Well balanced signature that addresses the audiophile concerns of it's predecessor.
    Cons - For those that loved the T10 bass the T20 will feel a bit bass lite. There is a peak in the lower treble that makes this IEM slightly fatiguing for me
    First off I want to apologize for taking so long to get this review put together. Circumstances and family responsibility have conspired against me this year in regards to being able put together a review when I wanted to. But I wanted to make sure I gave the T20 the proper effort as it is a worthy IEM that deserves that. I would also like to thank RHA for sending me their latest flagship IEM.
    OK enough fluff and excuses lets get to it [​IMG].
    Last year when I wrote my T10 review I suggested that RHA had created the perfect Pizza but that it wasn't my flavor. At the end of my review I asked them to make a new flavor. Now, I have no illusions that the T20 was because of my request because I think that RHA was already thinking past the T10 but I think my and all of the other reviews and comments from Head-fi members gave RHA the feedback they needed to start working on the T20 because this IEM is CERTAINLY A DIFFERENT FLAVOR! If the T10 was an all meat then the T20 is a Deluxe Pizza. Unfortunately for me I ate to much meat Pizza last year so find this new pizza to be slightly to spicy for my tastes and slightly lacking the meat department. The good news is I think I will be in the minority in this regard [​IMG].
    Starting with build quality as I compare the T10i and the T20 RHA has slightly tweaked and refined their already solid design. The memory wire has been slightly stiffened to help hit retain it's shape a but better but without sacrificing the original T10's comfort. The cable also appears to be very slightly thinner and the sleeve feels a bit less rubbery. The changes are very small but is nice to see that RHA is continuing to improve upon their physical design.
    The second bigger change RHA has made is their driver technology. The T10 had a single dynamic driver while the T20 has a DualCoilTM Dynamic driver. The difference in this technology has allowed RHA to create a more technically proficient driver that offers a richer more detailed listening experience.
    The accessory kit of the T20 is exaclty the same as the T10 model. Which is to say, VERY COMPLETE. RHA is one of the best manufactures out there when it comes to ensuring a person has everything they need to enjoy their products. The vast collection of tips are managed with a great easy to use organizer and the soft case houses everything a person needs easily. They also come with a good quality shirt clip. Overall I would rate the accessory kit of the T20 as a 5/5.
    Isolation is pretty much exactly the same as the T10, it is not quite on the scale of an Etymotic or Shure IEM for passive isolation but it is close. So I give it a score of 4.5 in this area. While I am on the subject of sound (outside of the music) I think the micro phonics of this IEM are also above average and again deserve a score of 4.5 ot of 5.
    Finally the T20 comes with the same filtering system as the T10. This allows a person to customize their sound to their preference at will. The even better news is the filter system seems to suite the T20 a bit better than the T10 as the T20 more balanced signature allows each filter to work as designed. For myself I found the neutral filter to work best as it allowed most of the bass and treble through without impacting the mid-range their is a slight V shape but it is very slight. The bass filter removes quite a bit of the midrange making the signature decidely V shaped. The treble filter removes quite a bit of the bass and lower mid-range giving an upper mid-range / treble oriented signature. For many the treble filter will be considered the most neutral especially if they come from IEM's like Etymotic or classic full size headphones like the AKG K/Q7xx line. For my testing I have settled on using the neutral filter as it suites my tastes best.
    When it comes to sound, like last year I need to say again... TO HECK WITH WHAT I LIKE! I say this because I was introduced to a darker less upper mid-range and treble oriented sound with the T10 and continued to search for an IEM that reflected that type of signature which lead me me down a different path to meet my personal requirements. So when I got the T20 I had already become used to this new signature. But the T20 is pretty much exactly what I envisioned RHA making when I initially reviewed the T10. So I do believe the T20 will be enjoyed by a large segment of audiophile oriented music lovers.
    In regards to which group that should avoid this IEM I would say if you really like a bass oriented experience the T20 will come up a bit short for you. Similarly if you struggle with any glare in the upper registers and ear fatigue you might find the T20 a bit to much for you as well. If you happen to like bass AND are treble sensitive you will find yourself turning up the volume to try and satisfy your bass love which then makes the treble even more problematic.
    Bass - I found the bass of the T20 to be much less than the T10 verging on being a bit to polite for my tastes. Having said that the bass is tight and detailed. It seems to have slightly less sub bass which is the one area I miss the most. I rate the bass as a 3.5 for bass lovers, 4.5 for balanced signature lovers, and 4 for treble lovers. But this is one area where the filters can make more of a difference especially the treble filter which will make the bass more in line with an Etymotic type of sound for the treble lovers.
    Mid-range - The midrange is more forward than the T10 with lots of wonderful detail and is decidedly less warm sounding. It is also more aggressive and edgy as compared to the T10. For most audiophile listeners the T20 offers the type of sound they want. Personally I wish is had a bit more warmth while maintaining the level of detail it has. I rate the mid-range as a solid 4 for my tastes and a 4.5 for balanced and treble lovers.
    Treble - The treble of the T20 is a massive step up from the T10. Where the T10 erred so far on the side of caution as to be considered muddy by many Head-fi members the T20 is clear, detailed, edgy, and ever so slightly hot. Personally I find the slight peak in the lower treble a bit to much for my ears causing slight fatigue especially if turn up the volume.. But for most audiophile listeners I think this won't be an issue. In regards to sibilance I only noticed what was naturally occurring in an album and then it was never really harsh or annoying. I rate the treble as a 4 for my tastes, 4.5 for balanced lovers, and 5 for treble lovers.
    My overall score based on my own preferences would be a 4, for balanced lovers and treble lovers 4.25 - 4.5
    1. pc27618349
      I've been keeping up with reviews for the T20 and am really interested - but the reviews for its isolation are mixed at best. Your review is the first one that rates it very high on isolation - can you elaborate more on how the isolation is? What noises can it attenuate when music is playing or no music is playing?
      pc27618349, Aug 4, 2015
    2. Takeanidea
      I think the isolation is top notch . My demo pair blocked out almost all outside noise and they didn't need to be turned up very loud at all.
      This is another great review . Thanks!
      Takeanidea, Sep 10, 2015
  8. ShreyasMax
    Brilliant. Other flagships beware.
    Written by ShreyasMax
    Published Aug 2, 2015
    Pros - Clear Detailed Sound, Good Build, Sound Tuning Filters for adjustable sound signature
    Cons - Non-removable cable
    The joys of reviewing a favorite product have eluded yours truly, until the T20 from RHA (Reid & Heath Acoustics) came along, supplied for review by my good friends at Headphone Zone (headphonezone.in), a specialist headphone and portable audio products retailer. ​


    I'm not professionally affiliated with them in any way, and this is my honest opinion on the product. Add to this the fact that this is my first review, sure does make things interesting. So do read on, for some impressions on the new flagship IEM from RHA, ol-rite!  ​


    Background > ​


    Terribly sorry for the hastily attempted Scottish accent above, I say; let me get a move on now, what. Right, I'm a 30 year old music lover hailing from the state of Kerala, India, also known as 'God's own country'. The state, or for that matter, the country itself, doesn't seem to attract high end headphones that much though, mainly due to the lack of awareness among the general public of their very existence in the first place, I would say. Only recently have a few retailers and even fewer specialist e-tailers opened up here catering to this segment of the headphone and portable audio market, and a few handful brands have been able to gain loyal followings among the audio quality loving music enthusiasts around.  ​


    My own personal encounter with good sounding headphones has been fairly recent; 2008 onwards, to be precise. A very good friend of mine (who also likes his music to sound as good as possible, and introduced yours truly to the world of digitally created music which i dabbled with briefly while at college, to no avail though, as expected) told me one fine day, "Hey, you've just got to listen to this headphone. There's this German brand called Sennheiser..". The headphone in question happened to be the humble MX-170 earbud, which, isn't a great sounding earphone by any means as per today's standards. But the shift from my previous Creative ear buds to this earbud from Sennheiser was so dramatic at the time that there was just no way I couldn't get more of this German specialist headphone brand. The rest of the journey, of course, is probably true for many young chaps today as well. A few IEMs and headphones (closed and open, on and around the ear) later, here I am with my hands (and ears) on the flagship IEM from a specialist Scottish company within its first month of release. Life is good, I say.  ​


    Gear Used > ​


    For this review, I've used my own gear as the music source, and considering that an IEM would be mainly used as a portable or semi portable solution, my source setup has been the FiiO X3 (1st Gen.) connected to the FiiO E12A through line out using the FiiO L16 interconnect.​





    Build and Fit > ​


    The build and fit of the T20 will be familiar to those who own the T10/ T10i, RHA's previous flagship models, as the build is exactly the same; all the changes have happened internally, barring the one obvious change of color of the over ear hooks which are now black, as opposed to grey / silver on the T10/ T10i.  ​


    WP_20150728_001.jpg WP_20150728_002.jpg




    The build quality, in one word, is excellent in my opinion. The housings, connector, y-split are all made of stainless steel, and there's good strain relief on the jack. The over ear hooks on the cable are a patent pending mouldable design, which is very good indeed. The included range of tips, silicone or foam, ensure that you get a good fit and seal off the outside noise very effectively. My minor gripe would be on the fit, especially related to the over ear parts, which seem to need moulding every time you put on the headphones, or else they seem loose on top of the ears. YMMV though. And apart from this, I'd give full marks to the build and fit of the T20, not least because of the 3 year warranty (yes, 3 years). That's just brilliant IMO.  ​


    Accessories - Tuning Filters > ​


    The retail box comes with a soft touch carry case, a whole range of ear tips fit nicely into a stainless steel holder, and the USP, sound tuning filters in their own stainless steel holder, with space for two pairs on the holder, to ensure one pair is always installed onto the earphones. These filters are for bass, treble and neutral (called 'reference') respectively.  ​

    They are to be screwed onto the nozzles by hand. Very nice.  ​


    The tip holder is a nice touch, although nowadays this has come to be expected as budget Chinese brands are even offering foam cut little boxes just for holding ear tips; Vsonic, for example.  ​


    The carry case looks premium indeed, and I personally prefer this slightly larger case to a more compact case, like the one for my Havi B3 Pro for example, mainly because I just prefer it's look better. Your opinion could vary on that though.  ​


    Sound > 


    Alright then, lets move on to the most important part; the sounnnnnd! Sorry, the sound. Do please forgive my excitement.  ​


    Most of my listening has been done using the Reference filter, and as with any new headphone, a burn in time was required to get familiarized to the sound signature. I do not have much of an idea about burning in for the drivers, and this being a review unit, has been used for a good duration of time before it reached yours truly.  ​


    Once I got used to the sound though, it was good. Very good. With a Capital G. It instantly outclassed my current gear, except for my HD558 open full-sized headphones, which I've been using at home for the past 3 years.  ​


    I am not an expert at describing sound technically, but from whatever I've heard so far, I believe the soundstage is wide, which I prefer. I have not yet learned to distinguish good soundstage depth, and so I shan't venture there. In comparison to my Havi B3 Pro1, which are no mugs themselves, I felt that a blanket had been lifted off the Havis when I put on the T20. The detail retrieval and instrument separation are very good. They are highly efficient earphones, and a turn to about 1/3rd of the volume knob on my E12A was enough to deliver powerful clear sound to my hungry ears. Since I do not have experience with top of the line universal fit IEMs or custom fit IEMs, I would not be able to do that comparison here. I sure wish I could, though, especially with the top end dynamic driver models like the highly regarded AKG K3003, or the IE800 etc.  ​


    Anyway, suffice to say that clear, detailed, rich and highly resolving were the terms that came to mind upon getting used to the sound signature of the T20. I did feel though that the midrange was ever so slightly recessed, but maybe that's just my impression because I've not been able to fathom till now what true, neutral sound actually sounds like. So, it could be that my 'ideal' midrange level was slightly more forward than that offered by the T20. Ymmv again.  ​


    Treble Filter > ​


    A brief listen using the treble filter was enough to judge that it wasn't my ideal preference because my main genre preferences are rock, folk, acoustic, progressive etc. But those who do prefer their treble to be slightly enhanced, without becoming harsh, would definitely prefer this one on. I guess electronic and classical music lovers might like this filter more. I'm not sure though, as I very rarely listen to these genres. ​


    Bass Filter > ​


    The bass filter would be instantly appealing to tracks which rely on heavy basslines, drums, percussion and I guess electronic, hip hop, and heavy metal music in general.  ​


    I used the bass filters for some tracks which benefitted with a bigger bass impact, especially tracks like Hatesong by Porcupine Tree, which is a mid tempo bass line and kick drums driven track, with the bass guitar prominently used throughout the song.  ​


    On the other hand, when the bass filter was used for tracks which didn't require bass enhancement or didn't improve the sound using enhanced bass, the overall output felt a little muddied. The tightness of the bass response while using the reference filters was traded off for a more enhanced but less refined one when listening to folk, rock, acoustic and even some metal tracks.
    Overall, the reference filter was the preferred pair, for my tastes at least.
    Summary >
    RHA have ventured up the price ladder with their new flagship, and I feel they're on the right track. I haven't been able to listen to their first flagship, the MA750, which I was looking to purchase at one point, but settled for the Havi B3Pro1 instead, and the MA750 was the model that got RHA the fame they deserve, in my opinion.
    Now would the T20 be recommended by myself? Whole heartedly. Is it the best price/ performance value out there in this price range? Yes it probably is. The sound tuning filters sure add a whole lot to this department as it can cater to a whole range of consumers, be it the big bass loving, or the slightly treble inclined individuals, there's a filter for that. The sound signature, apart from being 'rich' and not dry at all, is fairly uncolored in my opinion.
    So that's it, folks, thanks for reading through this hastily written first timer's review. Would appreciate your thoughts, suggestions et al.
    So while I reluctantly prepare to bid farewell to the review unit, here's wishing you fine folks some happy listening!
    Thanks & Cheers
    1. View previous replies...
    2. raghavsomani
      This is such a fantastic review! A pleasure to read...
      raghavsomani, Aug 8, 2015
    3. ShreyasMax
      Thanks, Raghav! Glad you liked it.
      ShreyasMax, Aug 8, 2015
    4. getclikinagas
      getclikinagas, Aug 12, 2015
  9. Hisoundfi
    A tough guy and an entertainer. The RHA T20 in-ear monitor with adjustable tuning filters.
    Written by Hisoundfi
    Published Jul 20, 2015
    Pros - Super sturdy build, Three year warranty, Phenomenal midrange separation, Full bodied and entertaining sound
    Cons - Slightly bulky for an IEM, Memory wire can be tedious
    At the time of the review, the RHA T20 has not yet been released in the United States. This review was done as part of a demo tour done with the Head-Fi community. The MSRP at launch is expected to be $239 UDS. Here is a link to the RHA site
    RHA has developed a following on Head-Fi with successful releases like the MA-750 and T10. They are known for their solid build quality and dynamic tuning. If there have been any knocks against them in the past it is usually by audiophiles who prefer a more linear tuning stating that the RHA models have too much bass for their own good. RHA is addressing this issue for those critics and introducing a new technology in the T20, using their unique “dual coil technology” which they claim will increase resolution. While I haven’t heard the other previous offerings from RHA, to this point many impressions are that the T20 has improved in terms of balancing the sound and offering a higher resolution earphone with better controlled bass response.
    I was given an opportunity to sample their product as part of a tour in exchange for my honest opinion and review. I am in no way affiliated with RHA.
    My Background
    I AM NOT a numbers and graphs audiophile or sound engineer. Personal audio enthusiast? Absolutely! Headphone junkie? Possibly…
    There’s something about quality DAPs, DACs, Amplifiers and Earphones that intrigues me, especially if they can be had for low prices. I will buy the $5 to $500 earphone that looks promising, in hopes that I will discover that one new gem that can compete with the big names in this industry. If you look at my Head-Fi profile you will see that I have purchased MANY different headphones and earphones, ranging from from dirt cheap to higher end products. For me, this hobby is more about getting great price to performance ratio from a product, and have a variety of different gears with varying builds and sound to mix and match. With personal audio gear, we tend to pay a lot of money for minor upgrades. One thing I’ve learned over the last few years is that just because a headphone has a higher price tag, it doesn’t mean that it has superior build and sound quality.
    I’m always looking for great audio at a great price. I’m after headphones and IEMs that give me the “WOW” factor. I can appreciate different builds and sound signatures as long as they are ergonomic, and the sound is pleasing to the ear. It is my pleasure to share my experiences with audio products and make recommendations based gear I have owned and used.
    The T20 comes in a black box with a nice size picture of the T20 on the front and some side notes and drawings displaying the key features of their product. The back of the box displays a diagram with explanations of its features in several different languages.
    There is a flap on the front of the box that opens to more information about their new DualCoil driver technology and schematics of their design. There is a nice frequency graph showing the difference in sound between each filter. The right of the display when opening the flaps shows a beautiful display of the product, filters, and eartips. The packaging and display is really well done.


    DualCoil™ Dynamic
    Frequency range
    16 Ohm
    Rated/max power
    1.35m, multicore OFC
    3.5mm, gold plated



    1. T20 in-ear headphone
    2. Tuning Filters with Holder
    3. 6 pairs, dual density ear tips - S x2 / M x2 / L x2
    4. 2 pairs, double flange ear tips - S x1 / L x1
    5. 2 pairs, memory foam ear tips - universal fit
    6. Stainless steel ear tip holder
    7. Premium carry case
    8. Clothing clip

    There are plenty of tips for just about everyone to get a secure fit and seal.
    The housings of the T20 are made of stainless steel. They are built like a tank. They are slightly heavy for an IEM, but not ridiculously heavy that it’s going to impair your ability to get a fit. RHA molded them into a pretty nicely rounded shape so they fit in the ear nicely and are very comfortable. The housing is designed for over the ear fit.
    Cable, Y-Split, Cable Jack, Strain Reliefs
    The T20 cable is a thick and robust design that looks like it's made to withstand the test of time. The cable has very little memory and enough spring to keep itself from getting tangled. It is a very high quality material that most will appreciate. The first three to four inches from the housing sports a rubber material memory wire. Some will like it, but like almost all memory wires I didn’t necessarily care for it and would have opted for no memory wire and the provided chin slider. Your mileage may vary.
    The Y-split is made of a combination of a stainless steel jacket and rubber strain relief. It is VERY low on the cable. It’s saving grace is a very useful chin slider that will keep there from what would be two separated cables running down to most people’s naval.
    The Cable jack is a stainless steel straight 3.5 mm gold plated plug. Strain relief at the cable is a metal spring.
    All in all, I find the cable to be just a bit too long for portable use (I am over six feet tall and still find it to be long). The amount of slack from the Y-split to the housing is excessive. On a brighter note, everything about the cable is top notch in terms of materials used.
    Ergonomics, Fit and Microphonics, Isolation
    Ergonomics are nice in terms of housing shape. They fit nicely, but the memory wire did require me to do a little extra messing with the wire to get a comfortable and balanced fit with them. Finding a tip that fit well was easy, as RHA provides a ton of silicone tips and comply foams in a couple different sizes. I doubt there will be anyone who can't find a stock tip that fits.
    I find the cable to be a bit long. Between that and the weight of the product, it is bordering on bulky. The chin slider is great in terms of solving these issues because it can be used to snug everything into place. Once I achieved a good fit, I didn’t have to readjust them very often. Getting a good fit took a little bit of extra work, but once I got it they weren’t going anywhere and were very comfortable.
    When I used these for walking or running I didn’t get any microphonics because of the over the ear design, but I did get a cable noise from the weight of the cable tugging and vibrating with each step. I found that snugging things up with the chin slider more than normal helped remedy this. With smart use of the chin slider I recommend them for use when being active.
    Isolation is slightly below average, however the robust yet controlled bass that the T20 presents makes them work great for commuting. When wearing them with no music playing, I can definitely tell that they are a vented design.

    Sound Review & Materials
    I used my usual same songs for testing gear:
    “Limit to your love” by James Blake (bass speed, punch, response)
    “Doin’ it Right” by Daft Punk (sub bass)
    “Get lucky” by Daft Punk (bass to midrange transition resolution, male vocals)
    “Madness” by Muse (soundstage, separation)
    “Some nights” by Fun (soundstage and male vocals)
    “The soundmaker” by Rodrigo y Gabriela (texture and imaging)
    “Bassically” by Tei Shi (bass to midrange resolution, female vocals)
    “Skinny Love” performed by Birdie (female vocals, acoustic playback)
    “One” by Ed Sheeran (male vocals, acoustic playback)
    “Outlands” from the Tron Legacy Soundtrack (symphonic presentation, imaging)
    “Sultans of swing” by Dire Straits (detail, separation, balance)
    “And Justic for All” by Metallica (driver distortion, treble response, rock playback)
    “Ten thousand fists” by Disturbed (driver distortion, treble response, rock playback)
    Note: Other tracks were used, but the listed songs were primarily used to asses and break down the gear’s response.
    Sound Signature
    The RHA sounds as tough and awesome as it looks. They are a beast of an IEM offering  a powerful and rich presentation that maintains a great level of separation. I heard a slight V signature that is customizable with different filters to tweak the sound and optimize listening pleasure. The filters didn’t change the sound too much, and offered minor adjustments while maintaining the RHA signature tuning for the most part. There was enough difference with each filter to know that anyone who tries these will have a preferred set, but not different enough that the general consensus will find any of the sets to be useless.
    The T20 plays every genre well with its somewhat consumer friendly tuning that will appeal to both audiophiles and the music enthusiast picking up their first higher end earphones. What I fell in love with when listening to these is how well they play rock music and metal. Simply put, they ROCK with these genres. To this point, I don’t think I’ve heard any other in-ear monitor that makes these genres so enjoyable.
    The T20 comes with 3 sets of tuning filters that screw onto the housing. Each filter could be screwed on to the housings and had a rubber gasket to ensure a seal of the filter when attached.
    With the bass filter there was a more forward bass presence and a reduction in highs. Separation and detail was still there, but it was a little too much bass for my preference, as it seems to intrude in resolution of the lower midrange.
    The treble filter was a close second to the reference filter for me. They provided the most linear sound with a more controlled bass response than the other two, yet still enough bass that it wasn’t lacking in any way. Treble was the most crisp of all three filters and while I enjoyed it quite a bit, I could imagine some people not caring for how forward the treble is, especially those who listen to their music at higher volumes.
    The reference filter was my personal favorite and rendered a slight v-signature that was pretty balanced and had a nice bass slam and higher frequencies that were spot on. Bass with the reference filter was sometimes bordering on too much with some tracks and would slightly impact the resolution of the lower midrange. Still, there is a level of separation of sound that you have to hear to appreciate.  All in all this was my favorite filter and what I will base my review on moving forward.  
    Bass on the T20 is bold, forward, fast and with enough punch and rumble to say that is is very well rounded and not lacking. There is a very nice balance when running sweeps from sub to mid bass tones. If there is anything I could fault about the bass response, it’s that the midrange and treble have such nice separation and air between sounds that the bass could sometimes seem wooly in comparison. I really don’t think it’s that the T20 bass is bad at all, because honestly it’s excellent.
    Midrange is lush, textured, and separation is superb. I really enjoyed listening to complex music passages, picking out particular midrange instruments and vocals and listening to them play without the sounds blending with other instruments. The T20 dissects the music and plays it beautifully without any midrange distortion. Although I do get a slight sense of these having a V-signature, It is a very slight V, and midrange frequencies are not necessarily lacking and don’t seem distant like other monitors with this type of tuning. I think the biggest accomplishment is the ability of its midrange to have a slightly thicker note presentation and still retain awesome separation and resolution. Well done RHA!
    There is a forwardness and resolution in the upper mids that I really enjoy and you probably will as well. This aspect makes the midrange pop and balances things with the robust bass presence, giving it a very entertaining sense while still being pretty natural sounding.
    Treble was spot on, with a tuning that many could appreciate. The pronunciation of the letter S never got harsh to my ears. It has very nice extension, better than average detail and a crisp feel that will get your toes tapping. It was only during some of the most complex treble passages that I would get sense of cymbals getting slightly splashy or grainy, but even then it didn’t necessarily take away from the overall presentation. Do I think the treble could be a little more resolving? The answer is sometimes, but I’m not going to deduct points because overall the treble response of the T20 is fantastic.
    Soundstage and Imaging
    The extended bass and treble along with the nicely separation in the midrange give me good sense of space, but for whatever reason the louder you play them the larger the soundstage gets. At lower volumes they don’t yield the same soundstage to my ears. I’m not sure if it’s because the bass presence or what, it just seems that way and I can’t put my finger on it. This applies to imaging as well. turning things up to around the ½ to ⅔ mark yielded better imaging that at ⅓ volume. I suppose isolation and venting play a part in this as well.
    Source Selection
    The T20 will sound fine with something as simple as a cell phone but I did notice that a more powerful and higher resolution source gave me better result. For the most part the better the source, the better these sound.
    Fidue A73 ($130 to $150 USD on many sites)
    A73 is like that dessert you can't stop eating. The mids are like a perfect consistency cream filling that you can't have just one bite of. You keep coming back for more. While it's not linear or flat or whatever you want to call it, it's this perfect amount of warmth and resolution that never gets tiring. The bass response is forward-ish and present, and displays extension and can be authorative when called upon. Midrange sounds (and vocals) really pop and sound lovely. The top end is layed back in upper mids and still high resolution, and finishes with a nice bite at the top end that is crisp without being fatiguing. Bass through midrange and treble, it is probably the most grain free sounding IEMs I've ever heard. I love the way the a73 fits. The housings are lightweight and there isn't any memory wires to fart around with. Some people prefer memory wire so take my fitment preference with a grain of salt.
    A73:Better fit for me, Better midrange, Completely grain free sound that is smoother and less fatiguing than t20, yet still entertaining, tuning works fantastic for vocals, Symphony, and EDM. Almost $100 cheaper.
    The t20 is a beast, period. It's built like a tank. It has a slight V-signature without making the mids sound distant in any way. Their tuning is customizable, which will better allow users to tweak the sound beyond tip rolling. To my ears there's more separation and air between sounds. The t20 really sounds like a multi driver setup to me. They have similar bass forwardness with a little more bass spilling into the midrange but is still minimal (a73 has forward midbass but less spillage). The upper mids are more forward and aggressive on the t20, but very high resolution (I prefer the t20 upper mids as they are more entertaining). The accessories package is phenomenal. There's enough tips for anyone to get a fit, and their accessories package destroys the a73's offering. I am not a fan of memory wire and caught myself farting around with the housings and wires to get a good seal more often than I would like. The t20 is truly end game caliber in terms of build and sound. They will impress everyone who hears them. They are a tough guy and an entertainer at the same time. Their world class separation of sounds is legendary.
    T20: Sturdier build, better separation of sounds, more accessories, customizable tuning, V-signature better for rock and modern genres, three year warranty is phenomenal

    T-Peos Altone 250 ($199 USD on CTC Audio)
    I had high hopes for the Altone 250 because I really enjoyed the Altone 200, and am partial to single dynamic and single armature hybrid earphones for the most part. However they messed up the tuning of the Altone 250 with tons of mid bass that drowns out the user’s ability to enjoy the rest of what they have to offer.
    Even with the bass filter of the T20 (which was my least favorable) the T20 destroys the Altone 250 in just about every auditory aspect with the only exception being that maybe the the Altone 250 has a slightly better treble response due to its armature driver being a hair more resolving and able to handle complex passages. Other than this the T20 is leaps and bounds better in sound quality. It also offers a better tip selection and case. The Altone 250 offers two detachable cables (one with a mic and remote, and one without) but their cables are stiff and springy and much more of a PITA to handle than the RHA model.
    Is there anything that would make me choose the Atone 250 over the RHA T20? NOPE! After using both of them, I would pay an extra hundred, let alone the small forty dollar difference between these two.
    The T20 rocks. It’s built like a tank, sounds phenomenal, and comes with a three year warranty. The only thing that would prevent me from recommending them to someone is if they said they were looking for something lightweight and with a linear tuning. Other than the fact that they don’t check these two boxes, there is nothing about them I could say is a glaring fault. I already expressed interest to RHA that I want to buy a set. I’m sad that I have to ship them off to the next lucky guy who gets to review them. I know my rock music collection won’t sound as good without them.

    Thanks for reading and happy listening!
    1. View previous replies...
    2. interpolate
      I've been curious about these. Maybe I'll give them a go when the cash flows a bit better.
      interpolate, Jul 27, 2015
    3. xoxiax
      Great review, really useful. How would you compare the rha's with the trinity Delta´s? Strictly in terms of sonic capabilities, even forgiving the price difference if you want. 
      xoxiax, Sep 5, 2015
    4. harry501501
      Thanks for such a useful playlist, especially breaking down each song's function
      harry501501, Jul 24, 2016
  10. LFC_SL
    RHA T20 DualCoil In-Ear Headphones: Worthy Flagship at a competitive price
    Written by LFC_SL
    Published Jul 6, 2015
    Pros - Price to performance ratio represents value for money. Assured sound. Comfortable.
    Cons - Non-removable cable?
    RHA T20 Review Tour
    Many thanks to RHA and forum member Rearwing for arranging the tour and the generosity of a 10-day listening period (my suspicion though is to pass some thanks to reviewer no.2 for postponing posting out the unit to him or her). There has been no discussion or attempt to preview my review. Just instructions on forwarding on the review unit. For completeness, no freebies or discounts has been offered for my time [​IMG] [​IMG]
    This is my first personal experience of RHA. Quite looking forward to it as have been aware if the buzz for some time and being a British company to boot. 

    Samsung Note 4, iPad mini Retina,  clas -dB and Pico Power stack and Sansa Clip+ (rockbox). All music 320kbps ripped from original CD. Everything from Prince, Jimi Hendrix and Iron Maiden to modern pop hits like Daft Punk. From rock to jazz to manufactured K-pop. BBC iPlayer R1 Live Lounge and Glastonbury shows thrown in also as we live in the Internet music video / streaming age.
    Photo Gallery: https://www.flickr.com/photos/steven2509/sets/72157655409582136
    Packaging and Presentation
    In ten-years owning many different IEM and headphones this presentation ranks highly. Many an IEM manufacturer in particular remain content with providing tips in a little plastic bag and being done with it. The selection of tips and filters stored within stainless steel plates will likely be that key initial visual interaction with the consumer when this hits store shelves. Removing the upper foam layer reveals a branded black zip "premium" case (material unclear), a shirt-clip and paper manufacturer text printed in several languages. The only items seemingly missing perhaps a 6.3mm adaptor and an airplane plug.
    Some may have preferred a hard case or drybox but that is no deal breaker in my view. Perhaps something like the black Shure case that comes with the SE846 is a good compromise. Pelican or Otterbox would seem overkill and increase costs.
    The theme continues with the main attraction of the earphones. RHA has adopted a 'Designed in UK, assembled in China' leader line. Metal injection stainless steel constructed earpieces enhances the first impressions; this looks and feels like a premium product. The marketing blurb indicates there are sonic benefits though nevertheless RHA did not strictly have to use metal. Even many times more expensive monitors will use moulded plastic. Not knowing what effect there are on costs versus plastic, am still prepared to give out credit. The use of stainless steel spreads out to the Y-splitter and plug, which are nice touches.
    The​ more you handle the item the more you encounter little design flourishes that delight. A lip built into the 3.5mm plug to make it case friendly. A genius coil spring at the plug connector end to provide strain relief. An elegant solution for the modern consumer pulling their portable device in all directions. The same "coil" is utilised to a more subtle, softer extent for the over-ear hooks or guides. As a glasses wearer the ear guides were quite fine. Am super pleased RHA did not adopt the industry standard transparent plastic sheath ear-guides - a design that really needs to be consigned to history. They are horrid as they may or may not penalise glasses wearers, but worse still they tend to pull the earpiece away from the ear. Plastic ear guides were fine 10-to-15 years ago, not in 2015. RHA are evidently also proud as the T20 ear hooks are labelled "patent pending".
    The cable is non-removable. This can be a positive or a negative. No weak point versus cable failures tend to be one of the culprits if your earphones sadly fail. This reviewer will not be able to comment on long-term durability and build quality. The cable is a touch thicker than preferred but it is somewhat nit-picking as it feels well built ​ and did not tangle during use.The Y-splitter point is though oddly set quite low. Standing tall it will be located around the belly button area give or take your individual height. It is a strange reflection of human anatomy! Perhaps RHA intended the extra length to allow sharing one earpiece with a neighbour.  In practice it does not matter. The cable has a rubbery feel so the slider does not move position unless you decide to move the slider.
    Finally and not that anyone would be concerned, for thoroughness the recent - brief - UK heatwave (by local standards​, everyone else would just call it 'summer'​​) peaking at 31.5* Celsius had no apparent effect upon the earphones.
    Fit and Isolation
    The earpieces are physically compact and so likely to fit most ears. My Shure SE846 are a touch 'fatter'. The Cypher Labs C6iem are considerably bigger than both. For the purposes of the review a disposable pack of silicone single-flange tips was enclosed. As such it was not possible to try the double-flange or foam tips. Isolation was reasonably good. The T20 was shallow-fitting in my ears, with the entire body snugly covering the ear canal. Your experience may vary. To permit speculation, longer tips may have given deeper fit, leading to greater isolation (and better fit normally enhances bass response). My suggestion to RHA would be to research the viability of longer length single-flange tips a la the Westone tips mentioned in the next paragraph. Double-flange tips are taller but then may be too fat width for some ears.
    Before touching upon isolation the T20 has a small "vent" located on each earpiece. Travelling on the London underground the roar of the train hurtling through the tunnel was largely minimised. Interestingly (and usefully) it was still possible to make out tannoy announcements. With my SE846 plus the benefit of Westone star / tru-fit tips, tannoy announcements would be too muffled to listen out for. For routine public commutes and even walking alongside main roads the main thrust of unwanted engine or vehicular noise was kept out. It was not possible to hear human conversation at street level. ​One occurrence which was noticeable was wind noise. Not to a defeating level, but not something that affects my other IEM. My suspicion is maybe a side-effect of the vents.
    Filters: Reference, Treble and Bass
    As a current SE846 owner and ex-Phonak PFE-232 owner, RHA impress highly in design implementation. A simple screw-cap system completed by hand. That is it. No changing tool or fiddly parts.
    As to the difference to the sound there is indeed an audible effect but a mixed bag. The Bass filter increases mid-bass quantity versus the Reference filter, however taking something away from the mids. The Treble filter would never get used if I became a T20 owner. The Reference filter is where it is at. Balanced yet punchy. Plenty enough bass to my ears and so the Bass filter does not feel necessary, though that is personal taste. Best mids and vocal presentation of all three. Treble nicely rounding things off.
    The Treble filter is not to my taste. It hollows out the overall signature. The upper registers adopt this wispy thin effect and also thins out vocals. ​Given the loss of body and integrity the Treble filter was only used very briefly by the writer. In comparison the SE846 White filter is more technically proficient as it does what it says on the tin.
    The Sound
    To get it out of the way from the outset: the RHA T20 earphones sound great. Particularly with popular music of your pop or hip-hop variety. My initial impression, one which remained sustained, is that the overall tonal balance is tuned very well. No honky vocals or out of place notes. No peaks or troughs. You would be surprised how many earphones out there make instruments sound digital or mess around with the timbre whereby instruments either sound off or the same. For example The A Team by Ed Sheeran has two guitars and a piano and the T20 renders them all correctly. One is indeed able to pick out the individual components.
    The second observation is that there is a cohesiveness and nice marriage of the overall sound signature. Even the Bass filter that increases the bass quantity a notch in honesty also leans towards being 'balanced'. The T20 seemingly copes with mid-range focused pop, delicate live female vocals or fast-flowing jazz. It is a chameleon.
    The third main observation is that all the meanwhile the T20 has this clear sound and clarity that cuts through. It is clean sounding but in a positive way. With the balanced Reference filter bass notes hit with suitable quantity and slam, such that the additional tonic of the Bass filter does not feel required. A lot of modern radio music ​is​ peppered liberally with bass beats. The T20 delivers that fun bassy quality ​desired​. There is however not so much sub-bass extension or rumble. The mid-bass that is present though is not bloaty and neither does it intrude upon the rest of the sound spectrum.
    The midrange is the star of the show. Vocals have an airiness and intimate quality. Sweeping musical notes have a nice full presence. I mentioned the bass does not interfere with the rest of the sound despite being fat and very much present. In fact the midrange stands up confidently. This would be assisted by the wide-ish soundstage spreading out the music on a flat horizontal plain ear to ear. There is not much by way of height of depth, but the horizontal width helps to avoid congestion. My personal opinion is that the Treble filter thins out the upper midrange too much and just no good for music, not least the vocals.
    The treble is pleasantly surprising. Sweet, controlled and extended. There is a nice energy listening to Hiromi and the T20 can indeed cope with fast interchange. T​rebl​e is pitched just right. Not forward or subdued. Perhaps ​erring on the safe side. That is to say there is no risk even the most sensitive will encounter glare, grating notes or loose splashy-cymbals. The T20 does lack the sparkly extension that higher price points deliver but that is perhaps understandable. Bass is easy to focus upon but the real test of mettle is how an earphone renders the upper registers. The T20 achieves a pass.
    Detail retrieval scores highly. If it was captured on the CD then individual elements are discernible. Mercifully there is no exaggeration. It is all merged seamlessly into the overall sound that you will take it for granted. The T20 absolutely does not zone into random ​information. Detailed and accurate but not overdone.
    Avoided instant switching to and fro as that tends to exaggerate differences. Giving the brain a period of adjustment does bridge perceived differences. Please note these are relative comparisons. If IEM-1 is described as having more A than IEM-2, that does not then mean IEM-2 lacks A, unless that is what is explicitly stated, thank you.
    Comparison with Cypher Labs C6iem
    As far as packaging goes there is no contest. CL simply wrap everything in a felt bag containing the IEM's and tips selection, then squeezed into a compact minimalist box. No wow factor. No unboxing experience. Does not strictly matter as it is all in the sound although there is nothing wrong with being indulged either.
    Turning to the sound the C6iem bass hits even bigger and harder than Bass filter T20. It is stressed the T20 are not at all bass light by any stretch of the imagination. Still if you have some hyper bass thirst to quench on a budget then perhaps the C6iem fits the bill. In truth the T20 is overall better balanced. The T20 has a noticeably wider soundstage. Perhaps a trick of the smaller field but the C6iem is more fuller sounding in a comparison. Perhaps it is the weighty bottom end propping up the sound that gives the C6iem a thicker signature. Between ​my experience of ​CL and JHA that would appear to be representative of the taste of th​e​ American consumer market. Upgrading the source Dac/amp does make the T20 have a richer and fuller sound whilst retaining that desirable clarity​. The likely consumer of the T20 will be rocking smartphones, which should be absolutely fine unless your phone has an atrocious headphone out.
    Comparison with Shure SE846 (stock cable, white filter)
    Presentation is a score-draw. The outer Shure box hints at luxury. Two cables, an extensive accessories selection and a lovely black carry case are very welcome. Western markets also get an oversized Shure-branded drybox. Nevertheless the open-like-a-book reveal adopted by RHA and the entire package proudly standing on display wins kudos points.
    White SE846 filter is used because for me that is the true reference Shure filter. For your mon£y you instantly notice the greater soundstage and 3-dimensionality. The improved separation and layering really add extra involvement to the music. That SE846 bass really brings it. Tighter and bigger impact. Sub-bass extension and rumble is now present.
    The extra bass and ​imaging capabilities brings a presence to [live] rock records that the T20 lacks.  It is something that cannot be unheard once experienced. For example Iron Maiden Rock in Rio and Jimi Hendrix Band of Gypsys demands that extra gusto to fully lose yourself in the energy of the performance. The vocals and mid-range with Shure has always been assured, although the SE846 loses the romantic warmth of the SE535. Speaking from memory-only, having owned the SE535 for over two-years, the T20 is better than the SE535 treble.
    The T20 then is no giant killer. Yet having spent the majority of the last nine/ten-days rocking the T20 as my main earphones, I did not miss the SE846 despite knowing it is on an altogether different level. RHA though do not feel too far away. Have heard a rumour - or this is starting one - that RHA are researching a higher-tier. These could be exciting times ahead.
    For a great deal of the population spending more than £20 on earphones is a risk and/or investment. People will readily spend more on clothing, electronics or on a meal out. Then again one would argue non-stock earphones are a discretionary purchase, albeit desirable. RHA has thoughtfully sculpted a product that seeks to reward and reassure that the customer has invested wisely. Who else offers a three-year manufacturer warranty out there that RHA stand behind the T20 with. Earphones are susceptible due to their usage environment. Without any knowledge of the long-term track record, such a statement inspires confidence. For £180 you get big sound. I have no hesitation in recommending the RHA T20​.
    1. Koolpep
      Very nice review. Great description of the sound. I agree with the SE846 comparison.
      Koolpep, Jul 7, 2015