Moondrop SSR Super Starship Reference Review

General Information

Design, Build and Comfort
The SSR design takes a fresh direction from the original Spaceship elliptical shape. The design, an almost “heart” shaped from the faceplate perspective, the right-angled straight nozzle and the cable pin connector placement, at first sight, created much puzzling questions on fit and comfort. And when you pick the SSR up for the first time, it all made sense. The solution, the size. The SSR is one of the smaller sized iem you can find on the market. The small size made wearing the SSR natural and fit excellently. Just a slide in, twist forward and with the right tips, they sit snuggly in the ear.

The SSR housing uses Liquid Metal Alloy material. It has a gloss-like gunmetal textured finishing and is very lightweight and feels incredibly solid. There’s confidence in handling them without worrying if it will break or warp under rough use. The faceplate and shell are held together with a black rivet, to complete the industrial design look and feel. A small air vent is located along the inner side of the length of the nozzle. An interesting placement for the vent. The nozzle ends with a tightly knitted mesh (patented triple layer anti-clogging acoustic filter) to keep ear wax and dust out. The other end of the “heart” shaped design sits the 2-pin connector (which accepts 0.78mm 2-pin cables) and the L and R indicators clearly embedded in the housing, making cable rolling a breeze.

The stock cable comes in an interesting clear pvc jacket that houses the Silver-Plated 4N Litz cable. Something refreshing from the now common bare braided stock cable. The cable itself is more than fairly soft with a little “springy” feel to prevent tangling up. Also the 2-pin ends are fitted with a flexible memory rubber guard that retains the ear hook shape, yet easy to stretch and bend when wearing them over the ears. The right ear cable comes with a red-ring to indicator. Small details but very comfortable thought out solutions on Moondrop’s part. We can swap out the stock cable for other cables to satisfy our cable rolling needs and also add those new Bluetooth add-ons and turn the SSR into a TWS iem as well.

The heart of the SSR iem, rest the Beryllium-plated Dome with a PU Suspension Ring diaphragm, accompanied by a N52 High Density Magnetic circuit (among the highest grade of magnets available in the market) to form the engine.

Fit wise, the SSR design works excellently with my ears and the M-size tips provide very good isolation without feeling ear ache or fatigue over long listening sessions (of about 2 hours straight).

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Sound Quality
For this section, the SSR iem with stock cable, were put through over 120 hours of continuous playback and followed with 24 hours of “resting” the drivers, since they arrived. This ensures during the review period, the iem sound characteristics have reached adequate maturity.

Choice of portable set-up employed in this review.
  1. The Dethonray DTR1 Prelude player paired with its headphone amplifier companion HDA-HA2, through a Toxic Cables Silver Widow interconnect.
A little note, to get (what I would consider) the correct fit, after insertion, try a track that has drums and “thump” in their impact. If we hear a solid “thump”, the insertion, tip used and isolation is ideal.

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Starting things off, my immediate impression.
The SSR Super Spaceship Reference iem, given its performance, is perhaps incredibly surprising that it sits in its price bracket (USD39.99). Surprising. When we read that an iem “punches way above its price”, it has never carried more precedence than the SSR.

Moondrop’s SSR is another step in raising their game in terms of performance to price. Pushing the value chain upwards in terms of performance while keeping the price attractive.

As soon as the SSR sit in my ears and the music starts, I was greeted by the familiar Moondrop signature sound. Which connected me back to the time I first heard Moondrop’s StarField. Am not sure if it’s a coincidence or is it Moondrop’s way of connecting its range of iems in a familiar way. After some thoughts, I would say it is a positive feel good move. And that is as far as the similarities go between the StarField and the SSR.

Detail Retrieval
The SSR has a taste of picking details to be spotlighted. This nature is more evident when the SSR itself tends to have a very dark background itself. It came to my attention when playing Fleetwood Mac’s Sara and Not That Funny tracks from the Live album. The way the selected details were highlighted like the organ keys that were struck, mainly the higher keys were more pronounced and that presented the track to be heard differently from how it is usually done. Lindsey’s vocals especially the screams sounded very natural and the nuances in his scream could also be heard. Even Yanni’s Santorini track had more pronounced emphasis in some of the upper register side of the music. Be in for an adventure to hear your music a little differently.

Score : 7.5/10


Dynamics
The immediate sonic delivery is pure energy. The SSR is energetic. There is amazing energy and speed in delivering a reference-like and uncoloured sound.

The highs are vividly sparkling and shimmers before fading at the end without effort. High hats with Chimes ripple and fades almost like as quickly as it came. In most experiences, such energetic treble delivery comes with some visceral impact, and with the speed that SSR does, tend to be fatiguing in short listening sessions. Not so here. In Bee Gee’s Night on Broadway, Yanni’s Point of Origin and Ayumi Hamasaki’s We Wish tracks, it gives very clear examples of this.

An area to note though, out of the box, the volume between layers of vocals and instruments, seemed pushed upfront, leading to music tracks sounding two dimensional with little separating the louder and softer passages. After 60 hours of running in the drivers, the separation of louder and softer passages in the music improved significantly.

Score : 7.5/10


Imaging
From the Live recordings, the instrument placements were adequately highlighted. More of either left, right or somewhat meshed in the centre. In better recordings, the instruments and vocal placement do improve. Though I feel is reasonable given it’s target budget segment.

Score : 7/10


Soundstage
Turning to the Live recordings once more, the SSR staging is respectably wide. Enough to give the performance a good sense of air and space. There is more sideways perceived staging than height and depth. This can be roughly measured during the level of applause from the crowd in the recording. And thanks to its somewhat dark nature, the quieter passages of piano keys stand out for its intimacy.

Score : 7.5/10


Speed
One of the early findings and as true then as of this writing, the SSR is a fast sounding iem. That beryllium coated dome and N52 magnet of a circuit moves at incredible speed. They keep up with just about every fast track I could throw at it, including A-Ha’s Train of Thought, where the starting portion of the track is too incredibly fast for many dynamic drivers to replicate accurately, is replicated flawlessly here.

Also Kylie Minogue’s Disco Down, the electronic beats in the background were rendered beautifully. The synthesiser beats come alive in the SSR, where they would normally be more “in the background” and muted sounding in other dynamic driver iems.

Score : 8.5/10


Timbre
Kris Allen’s In Time track, has rattles, guitar strings, drums and the works. The drum rumble ripples with very light (but enjoyable) low end decay across the starting of the track and brings in the soft natural rattles in concert with Kris’ finger style guitar strums and plucks. Each string just sounded natural and life-like as they can be rendered. Similarly can be heard in Fleetwood Mac’s Oh Well from the Live album. In standalone string albums, such as Kaki King’s Great Round Burn track (and by extension the whole album, Glow), sounded exceptionally good and enjoyable. The string pluck displays layers and they just pull you in as you listen. Truly mesmerising.
Vocals have a natural tone to them though they may sound somewhat less inviting due to that lack of warmth many would be accustomed to listening. You know, that warm wrapped around feeling. However, some recordings are done with a warm sounding slate, such as Yanni’s I Genitori, which sounded splendid (I’d attribute this to a fine mix of warmth, clarity, detail, all nicely shaken into a perfect cocktail flavour. Synergy.)
Perhaps this portion may be the decisive part for those who would like the SSR or perhaps look to other Moondrop iems. In terms of the vocals, string instruments and even the high hats, the natural almost uncoloured sound would be the SSR’s strength. For most, the very light mid bass bump may be enough to enjoy the music. Though the low end drum decay may be too light to sound “complete” for those who are used to more warmth and “meaty” presentation.

Score : 8/10

Tracks used for the review,
  1. Yanni - Santorini (Live)
  2. Yanni - Point of Origin (Live)
  3. Yanni - I Genitori
  4. Fleetwood Mac - Sara (Live)
  5. Fleetwood Mac - Not That Funny (Live)
  6. Fleetwood Mac - Oh Well (Live)
  7. Bee Gee - Night on Broadway
  8. Ayumi Hamasaki - We Wish
  9. A-Ha - Train of Thought
  10. Kylie Minogue - Disco Down
  11. Kris Allen - In Time
  12. Kaki King - Great Round Burn

The Child that is smart and also a tease
The SSR Super Starship Reference monitor, by my account above, may seem to be a tricky iem to figure out. It does make you work hard to understand it better. The music we know so well, takes interesting turns in the way its detail is spotlighted and hidden.

After running through more music tracks than the ones listed here, I’ve come to the realisation that the SSR excels well with fast tracks in the electronic genre, and on string element albums from such as Kaki King and Lindsey Stirling. They sound very good for their price, and even exceptionally more so on said genre of music.

The SSR in my books make an enjoyable and fun sounding outdoor monitor. The energy and speed makes listening more exciting. Am sure some may even find this addictive especially with fast sounding tracks. It also complements other Moondrop monitors such as the StarField. Especially so if you need more bite and energy in your instrumental library, the SSR delivers.

Overall it is a welcoming new addition to the Moondrop family and another signature high quality of work.
The Package
The SSR comes with the following,
  1. The Super Spaceship Reference iem
  2. SPC cable
  3. 3 pairs of silicon tips (S, M and L)
  4. Small pouch
  5. Moondrop card
  6. Warranty document
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Product Specification
SSR
Transducer typeBeryllium-Coated Dome with PU Suspension Ring and N52 High Density Magnetic circuit
Operating principle Vented
Frequency response:20Hz-20kHz
Impedance:16 Ω @ 1kHz
Sensitivity:115dB / Vrms (@1khz)
Stock cable
Material 4N-OFC (Copper)
GeometryLitz design
Y-splitMoondrop circular (black)
Monitor interface2-pin 0.78mm
Connection3.5 mm single-ended
PriceUSD 39.99


Review Ratings
PROS

+ reference, uncoloured and pleasing signature
+ fatigue free during fast high impact tracks
+ very durable industrial design
+ exceptional performance in string genre
+ scales with better amplification

CONS
  • subjective looking design for iem
  • bass centric and more warm sounding listeners will need look elsewhere

Rating (out of 10)
Sound Quality8
Build Quality9
Design and Usability 8.5
Comfort9
Value for money8.5


If this review interest you, and the product could be something you’d like to try or add on to your collection of sounds, you may find themselves available on here.

Disclaimer:
The SSR Super Starship Reference monitors were provided by Shenzhen Audio for the purpose of this review.

I was invited to provide my honest and unbiased opinion and have no affiliation or receive any form of compensation for this review.

This review did not go through Moondrop or Shenzhen Audio, meaning they will see this review at the same time as you are here.

Latest reviews

cactoos

New Head-Fier
MOONDROP SSR Review
Pros: + Vocals are very clear and highlighted.
+ Mids are really present in standard tuning
+ Awesome packaging, very tidy.
+ Graphics! I'm sure weebs would like this IEM. (or any other moondrop products tbh)
+Price (IMO)
+Sounds really great after EQ tuning/tweak
Cons: -Bass are quite hidden.
-Some people might dislike the design.
-The cables feels "cheap"
-Bassheads would probably hate this IEM due to the small driver size.
-Needs EQ tuning/tweak to optimize the sound.
This is my first review.
Critics are welcome.

The SSR is a very unique IEM to me, not only from the design, but the sound is very unique.

In bunch of hundreds of bass-cannons IEMs, i think the SSR is a special one. The SSR really stands out in the $40-50 range. Although i got it cheaper for Rp.480k ($31).
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What really makes the SSR different than other IEMs i have used so far is; The Vocals.

A lot of people agree that the SSR highlights the vocals and mids quite well. For me as well, i agree that the vocals are clear and highlighted, not quite sure about the mids, but overall they're both very clear.

Bass 6/10
The bass for me, is pretty hidden. I think it's because the small DD size, compared to the SSP; the SSR is quite weak at bass. Maybe because of the standard tuning, so you need EQ tweaks to achieve your preferred sound. I use Poweramp on both of my Samsung A52s & M14 5G

Mids 8/10
The mids are really confusing for me, i can hear the vocals pretty well but sometimes i cannot hear some instruments in the mid range. Maybe due to the song's mixing and mastering that caused the problem. Overall it's pretty good and clear.

Highs 8/10
The highs for me are good, i can hear cymbals crashing clearly in some songs, some songs the cymbals are just pure distortion chaos. But it's pretty good and clear overall, even in standard tuning.



The SSR comes in a pretty awesome packaging, ya know, common moondrop W.
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The packaging is really tidy and neat. No need to say more tbh.
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Cables, feels cheap. It feels so "plasticy" (?). But i think it doesn't really affect performance.
It has no mic, so y'all gamers might buy a cable with mic too.
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Also you get a small pouch to carry your IEM(s) around without the fear of getting your IEM stuck with other things in your bag/pocket.
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I think it's a pretty good IEM overall, i like it, i love it.
Also it's quite small compared to my ZS10 lol, so i think people that really thinks about size would like this one.

Sound wise, it's good, but like i said; might need EQ tweaks to achieve preferred sound.

Build Quality 7/10
Sound 7.5/10
Ergonomics 8/10
Price 7/10 (9/10 for me because i got it for cheaper.)
Overall 8/10

Device(s) used : Samsung A52S & M14 5G
EQ app used : Poweramp
Eartips used : TINHIFI Memory Foams

Nealz

100+ Head-Fier
Moondrop SSR: "Highlighting the Lyrics'
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Intro:
The Super Spaceship Reference (SSR) is a roughly $35 offering from Moondrop, it has a single Beryllium-coated dome + polyurethane suspension ring & a 16Ω output impedance. I specifically got this pair as an alternative to my Final E3000’s as I was using a warm source at the time (Shanling UP4) which led to some muddiness at times with certain tracks on my E3k’s. Auditioning the SSR at a local retail store I observed that this had less muddiness & paired better with my warm source due to its diffuse-field (DF) neutral signature. I was also very curious how a mid-centric device would perform, the SSR has a twin brother the Super Spaceship Pulse (SSP) which has an emphasis on the low end, I didn’t bother auditioning this because I knew what I wanted & SSP wasn’t it.

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Sources used during review: Shanling UP4 & Fiio BTR5

Tips used during review: Final E Tips

Pro’s:
  • Forwards mids with emphasis on upper mids, really makes you pay attention to the lyrics in a song. On my first listen I realized I was just enjoying music all this time, without really paying attention to most of the lyrics. So, I really appreciate the SSR teaching me something new.
  • I think detail retrieval is best in class at this price point, I could notice those small instruments & vocals in the background which other IEM’s at this price point failed to highlight.
  • It has an above average sound stage both is terms of width & depth. Acoustic Instrument timbre is surprisingly good!
  • Treble is bright & has good extension achieving a good amount of clarity & separation with a feeling of airiness to it
  • The sharpness of treble actually makes the SSR sound more detailed and gives cymbals a nice splash. There is no harshness or fatiguing peaks present here.
  • The bass is fast & tight here without bleeding into other frequencies but there is definitely a lack of quantity compared to other more V shaped competitors in this price range. Using a warm source like Shanling UP4 & Final E Tips, certainly gives the sub bass more of a presence & rumble.
  • The heart shaped enclosure/housing of the SSR is extremely light weight which makes it a joy to use for longer listening sessions. I hope Moondrop seriously considers making more IEM’s with similar design, comfort being a main priority.
  • The 2 pin 0.78mm sliver plated cable is a nice addition, it’s soft, doesn’t get tangled up easily & I didn’t notice any microphonics with it. The cable isn’t too stiff and has a rubbery feel, although the addition of a chin slider would have been appreciated.

Con’s:
  • Due to the emphasis on upper mids the SSR can sound quite shouty at time specially at higher volumes & during high pitched notes.
  • As a result of this shouty-ness the SSR will not please those loudness junkies, although I too like to listen to my music loud, I found in most cases I was able to listen to the SSR loud enough without it getting too shouty.
  • Since SSR has a diffuse-field (DF) neutral tuning & analytical nature notes can sound cold & thin. SSR won’t be everyone’s cup of tea, especially those looking for a musical & fun listen.
  • The lack of bass quantity doesn’t make the SSR ideal for bass forward genre’s like EDM & Hip Hop. Due to its neutral tuning & analytical nature The SSR will sound dull & lifeless when compared to more V or U shaped IEM’s.
  • The SSR is very source picky & does require amping. Testing it directly from a 3.5mm jack of the Xiaomi K30 Pro there was definitely a lack of volume & the sound felt hollow. Using a mid-tier dongle like DD TC35B or Bluetooth dongle like Shanling UP4/Fiio BTR 5 certainly fixes the issue.
  • The tips provided in the box are not that great & I could get a decent fit but didn’t like how they sounded & felt. Tip rolling is advisable in this case, for me personally the Final E tips worked great.
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Comparisons:

Blon Mini:
I guess these two are polar opposites, while the blon mini is big on sub bass rumble. Has recessed mids & dark sounding, the Moondrop SSR sounds neutral with a boost in upper mids & and has good treble extension. Bass-heads will definitely be impressed with the Mini, while personally I liked the analytical nature & detail retrieval of the SSR better.

Final E3000: Final E3000 has very different tuning than that of the Moondrop SSR, its extremely smooth, fun sounding, with a good amount of mid bass & the mids are thick & lush. While SSR has more of a cold & analytical nature with thinner notes & very forward yet thinner upper mids. Again, polar opposites in terms if tuning, although the E3k’s are a power-hungry beast, the more power you feed the more they shine!

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Conclusion:
As I mentioned in my con’s list the SSR won’t be everyone’s cup of tea, but in a sea of V shaped & bass heavy tunings the SSR is indeed a gem. Usually, these V shaped IEM’s lack in departments like mids & details retrieval & treble extension, this is where the SSR excels. If you are planning on getting a pair of SSR’s I would definitely giving them an audition before buying a pair. And if you are already familiar with how diffuse-field (DF) neutral tuning sounds, you know what you’re getting into! Kudos to Moondrop for providing more variety in the $30 to $40 range.
Last edited:
G
gmdb
I have the SSR on order, I already have the SSP which are very good indeed. I love their tone and I'm keen to hear that same quality with the more neutral tuning of the SSR.
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Reactions: Nealz

ezekiel77

Reviewer at Headphonesty
Moondrop SSR – The Sunbeam Serenade
Pros: -Value for money
-Petite design with robust build quality
-Snug fit and excellent comfort
-Class-leading detail level and transient response
-Good note texture and definition
-Bass detail and texture
-Clear and forward mids
-Clean staging with pinpoint imaging
-Baby Etymotic!
Cons: -Threadbare accessory set
-Unergonomic cable
-Poor isolation
-Dry, cold sound
-Inaccurate tone and timbre
-Anemic bass
-Strident, aggressive upper mids
-Small soundstage
Moondrop’s latest has a fantastical and grandiose name, but at a very affordable price. Featuring a flat, diffuse-field neutral tuning, could this be the baby Etymotic you’ve been waiting for?

When the moon hits your eye like a big pizza pie, that’s… love? Lunar-related violence aside, Moondrop has been one of the most refreshing in-ear monitor (IEM) brands to appear as of late, winning acclaim and accolades with each new release. As you know I’ve taken quite a liking to Starfield, their budget superstar, and fervently look forward to their new releases and subsequent buzz.

I would've named them Space Opera Supreme, since we're going full grandiose.


Moondrop’s latest offering goes a tier lower in terms of price, and is called the SSR or Super Spaceship Reference, the nomenclature an ode to their earlier IEM, the Spaceship. In medical parlance, SSR stands for sick sinus rhythm, a disease of the heart that prevents it from maintaining a regular beat on its own. Nothing I can do, a total eclipse of the heart. Moondrop’s heart-shaped SSR hopes to resuscitate your ailing heart and introduce rhythm into your life. Corny, I know.

The SSR is a tiny, reference-tuned IEM, housing a single dynamic driver (DD) in each earpiece. Why reference? As with other Moondrop releases, they’ve done their homework, and based SSR’s sound on the diffuse-field (DF) neutral signature. This is the first of a planned twin release by Moondrop, the other being the SSP, or Super Spaceship Pulse, featuring a fun, bass-oriented signature.

The SSR is available in 4 colors, which are silver, white, pink and green. You can currently purchase them via :
I’d like to extend my thanks to the Moondrop team for the review unit.

Have a heart, give to chair-ity.
Have a heart, give to chair-ity.

Equipment Used

DAP
  1. FiiO M15
IEMs
  1. Moondrop SSR
  2. Etymotic ER4XR
Albums
  1. Amber Rubarth – Sessions from the 17th Ward
  2. Bruno Mars – 24K Magic
  3. Daft Punk – Random Access Memories
  4. Dua Lipa – Future Nostalgia
  5. Fleetwood Mac – Rumours
  6. Kendrick Lamar – DAMN.
  7. Lana Del Rey – Born To Die
  8. Melissa Menago – Little Crimes
  9. The Eagles – Hell Freezes Over
  10. The Weeknd – After Hours
Technical Specifications
  • Frequency Response: 20Hz – 40000Hz (1/4 Free-Field Mic)
  • Effective frequency response: 20Hz–20000Hz (IEC60318-4)
  • Driver: Beryllium-coated dome + polyurethane suspension ring
  • Housing material: Liquid metal alloy
  • THD: ≤ 1%
  • Cable Material: 24 AWG Litz 4N OFC
  • Cable Connectors: 0.78 2-pin
  • Sensitivity: 115dB/Vrms (@1khz)
  • Impedance: 16Ω (@1khz)
  • Voice Coil: φ 0.035mm-CCAW [Daikoku]
  • Acoustic Filter: Patented Anti-Blocking Filter
With more accessories than you can shake a stick… oh.
With more accessories than you can shake a stick… oh.

Packaging and Accessories
You have a waifu! The Moondrop girl is ubiquitous in their packaging as of late, and she adorns the front of the box, smiling, decently dressed, and using Moondrop IEMs as sort of a double advertisement. I know some fans love this, and frequently ask for her to be featured in more promotional material. Well, you do you, guys.

The SSR is packed in a square white cardboard box, displaying the technical specifications and frequency response graph at the back, and yes, your lovely waifu in front. The accessory kit is threadbare and disappointing. You get the IEM, cable, three pairs of silicone ear tips in varying sizes, a tiny fabric pouch and a manual. I would rather a zippered or hard case instead of the pouch, to better protect the SSR.

The provided cable looks much like Plastics One, but with quality insides, namely silver-plated 4N oxygen-free copper (OFC) with Litz wiring. Some similar cables already cost more than the SSR, so this is a smart move by Moondrop. The cable isn’t too stiff and has a rubbery feel, lessening Jada Pinkett-style entanglements. The ramen-like springiness and awful memory effect irks me though, so handling the cable isn’t good.

Petal to the metal.
Petal to the metal.

Design and Build Quality
Within these tiny earpieces are quite a bit of technology. The main driver is a beryllium-coated dome surrounded by a polyurethane suspension ring, retaining rigidity and flexibility. At the base of the driver is a copper-clad aluminium wire (CCAW) voice coil and a high-density magnetic circuit. When a current runs through the voice coil, a magnetic field is produced which moves the diaphragm.

The driver unit is protected by housing made of single-casted amorphous metal alloy, or liquid metal like T-1000 heh. The SSR’s long nozzle is at a right angle from the housing, and at its tip resides Moondrop’s patented 3-layered anti-clogging filter and acoustic damper unit. This combined filter/damper unit keeps earwax at bay, and shapes the sound before being directed towards the ears.

The tiny, heart-shaped SSR earpieces are lightweight and a delight to hold. Despite some visible corners, the edges are smooth and seamless and showcase a robust build quality. While not as pretty and aesthetically perfect as the Starfield, the SSR possesses an industrial charm with its simple and compact design. If I were you I’d choose pink though. That’ll make a great Valentine gift.

When you don't know which side to choose, sit on a big fence.
When you don’t know which side to choose, sit on a big fence.

Fit, Comfort and Isolation
When viewed from the side, the SSR is small enough to be mistaken for earrings. Earrings of steel hearts, baby. The shells measure only half an inch from all sides, coupled with the long nozzles confer a precise and snug fit. This is intentional so the SSR will fit ears of all sizes. Comfort is superb too, and I can lie on my side while listening. Moondrop did a great job here. I can’t get over how tiny the SSR is. One sneeze and they might disappear.

The SSR has a vent on the base of the nozzle of each earpiece, to accommodate the dynamic driver. As such, keeping external noise levels as low as possible proves to be a challenge. They don’t isolate well at all. You’re out of luck in a busy environment, as outside noise more often than not seeps in and dilutes your enjoyment. It’s hard to be caught up in the music when real life interferes, as always.

Well, you asked for gold bars.
Well, you asked for gold bars.

Sound Quality
So far, the SSR has a lot going for them, but we arrive at the make-or-break sound section. Get ready your mittens.

Overall Sound Signature
As you know, Moondrop are teacher’s pets. They have studied, memorized, dissected, and re-interpreted the two cornerstones of neutral signatures ad infinitum, becoming masters of both DF and Harman-neutral. This is reflected throughout their product line, which showcases tweaked versions of both tunings. Curiously, DF-neutral is found in their most expensive IEM, the Solis, and the cheapest, the SSR.

DF-neutral, and SSR in effect, is characterized by a flat, sterile sound, or what I call textbook neutral. The emphasis is on detail retrieval and technical nuance above musicality and euphony. For better or worse, the signature works more as a tool for audio engineers to use as studio monitors, rather than something to kick back and relax with.

So SSR possesses a dry, textured bass that is uncolored and unenhanced, delineating every note clearly up to the mids. The mids is a stalwart of clarity and clinical precision, before taking it to another level in the upper mids, in what I can only describe as a detail-lover’s avalanche. Here, forwardness and aggression dictates proceedings until the lower treble, before retaining sensibility and rolling off in the uppermost regions.

Beyond the valley of the shadow of doubt.
Beyond the valley of the shadow of doubt.

It’s an intense ride not for the squeamish. Make no mistake, this is a musical scalpel, fully armed to extract every bit of detail from your music. The dedication to information is such that enjoyment very often takes a backseat, as you hear familiar song after song presented in bright, near-hostile fashion. Notes often have a thin, cold slant, and the question remains whether this kind of neutral is accurate at all.

Listening Conditions
Critical listening was done after 100 hours of burn-in, reducing the toxic levels of beryllium and hopefully making the signature easier to stomach. Unfortunately, nope. I hear no difference before and after burning in, so the cold dish of revenge, I mean neutrality, remains. The principal review rig is FiiO’s M15 player, with the included cable and medium ear tips.

Bass
Flat as a pancake and probably just as dry, SSR’s bass challenges your perception of just what a reference should be. Bassy instruments like cellos and drums normally share attributes like authority, slam, roundness and fullness, especially from a speaker system. But those words won’t really describe the SSR, in fact, it doesn’t sound true-to-life much.

Instead, our ears are treated to a richly-detailed and well-layered bass section, with a palpable texture more akin to denim than silk. There is a bit of punch, warmth, and smoothness, but it’s more a case of dropping teasers and appetizers without arriving at the full meal. You won’t feel satiated, and the rough, gritty texture is definitely not for everyone.

The sub-bass performance is adequate, with a little rumble. The flat mid-bass will however, drive you nuts. You wait for the beat to drop and when it finally does, you think “that was it?” The SSR opens your ears to new bass frontiers, because you’ll hear details and layers that were not obvious previously. But when you want a physical bass to take you over, he takes out his reading glasses instead. This does not please the people. It’s no secret I’m not a fan of diffuse-field neutral, and the anemic bass performance is the #1 reason why.

The lesson is, the real treasure has been inside your ears all along.
The lesson is, the real treasure has been inside your ears all along.

Mids
Like polar bears, the mids are the most polarizing factor of the SSR, both a highlight and a hindrance. First off, the SSR possesses outstanding clarity and transient response, probably unheard of in this price range. Notes are thin, tight, and hit with rapid precision, with clear separation from one note to the next. Mids texture is crunchy and delicate, providing heaps of energy and urgency. Decay is swift as well, leaving the stage clean and crisp. Technically and tactically astute, that’s their name of the game.

For all the heroics in detail retrieval though, tonal accuracy takes a big knock, a TKO in fact. Mids are placed too forward and can be invasive and fatiguing. The note edges need smoothening too, as the dryness and grain distract and takes much away from emotional engagement. Vocals sound breathy and throaty, while instrument timbre is bright. You barely have time to feel or register a note before it’s hurried on to the next.

The worst is yet to come, as a steep rise in the upper mids results in a spiky and strident sound. Instruments trade body and fullness for tizziness and sharp edges, while ‘s’ and ‘t’ sounds are accented. Coupled with the raspy vocals, it’s a grating listen. The upper mids are like a car crash you can’t look away from, because it’s so prominent and forward it overwhelms the rest of the spectrum with its “hey-look-at-me” mannerism.

Take heed pal, I hear the signature's a real live wire.
Take heed pal, I hear the signature’s a real live wire.

Treble
Like turning over so your back gets as much sun as the front, the treble is just bathed in brightness. The adage “leave no stone unturned” is apt here, because every loving treble note is left bare, revealing oodles of micro-detail and shining, shimmering texture. It’s time to wear your sunglasses.

The lower treble continues the dirty work of the upper mids, working in tandem to provide a forward and crispy tone. Tons of sparkle are handed out, almost like a charity. Cymbals and hi-hats ring clear and true, with a bright, zingy finish. It’s perhaps too energetic and the notes could use more fullness, but there’s not much to fault with the timbre here at least.

Thankfully, from the middle treble upwards, the SSR finally slows down and engages a lower gear, showcasing some restraint and control. No doubt smoothening over the edges here will deny the signature some air and spaciousness, but this provides much-needed respite from the unforgiving upper mids assault. Brightening the treble any further would’ve rendered the SSR unlistenable.

The true meaning of neutral is really a grey area.
The true meaning of neutral is really a grey area.

Soundstage and Imaging
As a kid, one of a litany of punishments I’ve endured after misbehaving was to stare straight at a wall, with the nose touching it. The SSR’s soundstage reminds me of that happy circumstance, ample width with almost no depth. Music occurs mostly inside the head, an effect of the forward mids placement. I am saved from further congestion thanks to the effective diffusion of sound to the left and right.

Claustrophobia aside, layering and separation are rather effective here, as the SSR displays astute technical chops in letting each note have its own space. The precise imagery and placement is of course enhanced, thanks to SSR’s thin notes and quick decay, since a clean stage allows details to pop out unabated. So it’s ice chips for dinner, hooray.

So near, sofa, so good.
So near, sofa, so good.

Comparisons

Etymotic ER4XR

You can’t mention DF-neutral without a nod to Etymotic, the godfather of IEMs. Etymotic built its name and entire legacy on the one signature other brands fear to tread, and sounds as distant from commercial as you can imagine. But you have to admire their grit and tenacity, sticking to their sound until today, like Absolut Vodka thriving on the same ad campaign for decades. Mmm vodka.
First off, this is not a fair, apples-to-apples comparison. The ER4XR is Etymotic’s current flagship and costs almost 10 times the SSR, and if you’re not in the mood to read further, the EX4XR is better. But I won’t be comparing them if SSR didn’t put up much of a fight.

The ER4XR performs like a supercharged SSR. For all the SSR is capable of, the ER4XR boasts even better technical merits, with resolution and clarity hitting like a splash of cold, expensive water to the face. Moreover, the Etys sound more balanced because of increased bass presence and a tamer upper mids rise. These two factors alone make ER4XR the more complete IEM, with some fun thrown in for good measure.

The showdown of the ear-piercers.
The showdown of the ear-piercers.

While their signatures are more similar than not, ER4XR surges ahead with a distinctly dynamic and airier sound. This is possible thanks to the Ety’s quicker note decay, deeper and better-defined soundstage, and less aggressive upper mids. Music has more space to breathe compared to the borderline-uncomfortable intimacy of SSR.

Where the SSR surprisingly wins, is in tone and timbre. I’m not a fan of either one to be frank, but SSR sounds more natural and realistic throughout, compared to the Etys which fancy a bump in texture and brightness wherever possible.

The ER4XR is undoubtedly more energetic in the higher registers, but the upper treble presence lends a hot, digital glare to the tone. You can spot a tinny harshness throughout the spectrum especially if the recording is poorly mastered. There’s your scalpel at work.

When the dust settles, considering the much cheaper price, the SSR is the value-for-money prospect, easily positioning itself as a viable alternative to the mighty ER4XR, with better tonality to boot. To answer an earlier question, yes, we’re looking at baby Etymotics here.

Waifu power overcomes all.
Waifu power overcomes all.

Final Words
At the day’s end, I am conflicted. The SSR and other DF-neutral monitors sound a country mile away from my preferred signature, and having one in my collection serves more of an academic purpose than anything else. There isn’t a day in the calendar where I’d like to listen to a cold and brutally honest interpretation of my music library. Like Jack Nicholson might say, I can’t handle the truth.

Moondrop’s SSR though, is willing to throw caution to the wind, and give a good go at a classic tuning. There’s no denying that you get more than your money’s worth in clarity, speed, note texture, and all the technical shenanigans. In the same tier, the SSR practically has no direct rival, and that alone might pique your interest, especially for the price of a few cups of fancy coffee.

If nothing else, the SSR serves as a reminder of Moondrop’s tuning versatility, with an ever-expanding repertoire of tried-and-true sound signatures. And now, with a loyal fanbase, they are bolder and taking more risks with their innovations. In the works are a flagship-grade dynamic driver IEM and over-ear headphones. The sky’s the absolute limit for them.
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Comments

kawaiiasfucc

New Head-Fier
Nice review. Convinced me to get them. I'm planning to get a set of foam eartips as well for them but I can't find any information about the diameter size. Would a 4.5-5mm be a good fit? Link
 

kenz

500+ Head-Fier
the 4.5/5mm would be fine. there's no "lip" on the nozzle, so a tighter fit might be a better choice to prevent the tip from coming off during removal. Still, the stock tips are pretty good on their own. maybe give them a try before further investing in newer tips.
 

dragonx64

Head-Fier
@kawaiiasfucc I measured the size of my SSR and the nozzle is about 5mm which I think if you were to get the TRN tips, it should fit but you might need to fiddle a little before it goes through. However as written in my review, there isn't so much bass so using foam tips might make the bass have less presence so keep that in mind!
 

Chessmate

New Head-Fier
The bass is good but lacks puch still audible and have plenty if details I used bigger tips and loeer the volume to control. Natural timbre. Nice fit and fast and technicality best fo single DD
 
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