10mm single dynamic driver. As audiophiles ourselves, we know exactly what you want from a pair of in ear monitors- Great Sound Quality and Lasting Durability. Thus, we set out to create a pair of earphones with these objectives in mind.

Alpha & Delta D6

Rating:
4.16667/5,
  • d63.jpg

    Sound: Balanced Sound signature with a good sound stage
    1) 10mm dynamic driver: Our custom tuned 10mm dynamic driver satisfy the High Res Audio standard ensuring great clarity and a balanced sound signature.

    2) High Definition sound stage: In order to achieve a spacious sound stage, we adopted a Dual Air Chamber acoustic Design and licensed the High Definition Sound Standard (HDSS (www.hdss.com). Both technologies serves to reduce distortion in earphones, improving clarity and soundstage. (more information below)

    3) Eight Core silver plated copper (SPC) cable: Our 8 copper silver plated copper cable allows greater signal transmission, ensuring great clarity.

    Durability- Built to Last! 3 years warranty!
    1) Eight Core silver plated copper cable: Most earphones use the 4 core cable. Once breakage occurs in one of the cables, the earphones cease to function. However, our 8 core (SPC) cable ensures that the earphones continue to function even when one of the cable breaks.

    2) Reinforced Strain relief and Spring protected 3.5mm jack: The D6 is reinforced at the y-split and at the earphone's housing. Moreover, the vulnerable 3.5mm jack is protected by a spring to ensure it can withstand any impact.

    3) Three years warranty: We take pride in our workmanship and believe that we have taken the necessary measures to ensure the earphones are durable for daily use. Thus, we provide 3 years warranty as a testament to our efforts.

Recent Reviews

  1. audio123
    Alpha & Delta D6 - Exciting Times
    Written by audio123
    Published Feb 18, 2018 at 9:47 AM
    4.0/5,
    Pros - Sub-Bass Extension, Clear Midrange, Crisp Treble.
    Cons - Detachable cable would be nice.
    Introduction

    Alpha & Delta is a Singapore brand that features a lineup consisting of AD01, D2 and JAAP that targets different users. The D6 is a newly released iem that utilises their own technology, HDSS high definition. I would like to thank Lend Me Ur Ears for this opportunity to review their latest iem, Alpha & Delta D6. At the moment, you can purchase the D6 from http://www.lendmeurears.com/alpha-delta-d6/ .

    [​IMG]

    Specifications

    • Driver unit: 10mm dynamic driver
    • Impedance: 16 ohm
    • Rated power: 1mW
    • Frequency Response: 10 Hz – 40 Khz
    • Speaker Sensitivity: 1055 +/- db/ mW
    • Cord Length: 1.2m silver plated copper cable (each core contains 22X 0.05 silver plated copper wires)
    Unboxing & Accessories

    The D6 comes in a black package with a transparent cover. At the front of the cover, it shows the description, brand name and model name. After removing the cover, there is a leather case which contains 1 pair of ear guides, 1 shirt clip, 3 packs of tips and 1 leather cable wrap. There is an instruction manual too. The overall packaging is nice.

    [​IMG]

    [​IMG]

    IEM Build & Design

    The D6 has a glossy gunmetal faceplate with the Alpha and Delta initials printed on it, “AD”. Below the initials, there is the HDSS technology name printed. It is in a different shade so it will contrast with the gunmetal colour. There is a vent at the top of the iem and near the nozzle. The iem has a circular shell with circular indents. It has a straight nozzle with a soft mesh for earwax prevention. The material used to make the D6 is aluminium. The iem has no detachable cable. The D6 is rather light weight and its design is quite simple. Overall, it is constructed well and fits in my ear comfortably.

    [​IMG]

    [​IMG]

    [​IMG]

    [​IMG]

    Cable Build & Design

    The cable is 8 core braided and there is strain relief on each side. On the strain relief, there is a L & R marking on the inside of the strain relief to differentiate between left and right. There is no memory wire area. Moving on to the y-splitter, it is circular and the housing is gunmetal in colour. There is strain relief at both ends. Lastly, the jack is 3.5mm right angled gold plated. The housing that extends from spring loaded strain relief is gun metal in colour while the housing that extends to the gold plated jack is matte black in colour. It is a good cable with a robust build and visual appeal.

    [​IMG]

    Sound Analysis

    Lows

    The D6 has an excellent sub-bass extension with a great punch to it. The sub-bass extends itself well and I am able to feel the depth. Rumble is speedy and it is presented in the most engaging way. The bass decay is agile and each bass note keeps coming which helps to improve the overall dynamics. There is no lacking in body too and this does not compromise on the nature of it. Presentation is rather clean. There is a good mid-bass slam which helps to give the sound an extra punch. Bass is generally impactful and there is a smooth transition from the lows to the lower midrange.

    Mids

    The midrange on the D6 is fun sounding. I feel there is a good quantity in the midrange. For the lower mids, it is slightly boosted by the lows. It is not hollow and male vocals are presented in a natural way. The upper mids is quite forward and female vocals shine with definition. There is crisp and I feel the quantity is sufficient for vocals to have a bite. Resolution on the D6 is good and the midrange operates in a clean and lively manner.

    Treble

    The treble is extended well with a good mastery. It is tight and the finesse is there. There is good quantity to it with a slight sparkle for a punch. There is no sibilance and harshness. Although it is not the smooth kind of treble, it retains the liveliness with a very tight control so it will not be expressed as shouty. There is a good level of details retrieval and the amount of air rendered gives a lot of space so it does not sound congested.

    Soundstage

    The D6 has a good width in its stage so you will get an open feeling. The width aids in the positioning of instruments and vocals. The depth is not close in and there is a good 3D feel with vocals intimacy being retained. There is a good natural expansion.

    [​IMG]

    Comparisons

    Alpha & Delta D6 vs TFZ Exclusive King

    The D6 has less sub-bass quantity but its extension is greater than the King. It stretches deeper and the sub-bass reproduction is clean. Bass articulation is very similar. The D6 has more speed than the King and there is a better expression in the rumble. Rumble is pacey and the overall sound is more exciting. The mid-bass quantity on the King is more and there is more slam. In terms of the overall bass, the D6 is more exciting due to its quick decay. The lower mids on the King has more quantity than the D6. In terms of upper mids, I find the D6 to be more forward and there is extra definition and crisp. There is a good bite coupled with intimacy of female vocals. Next, the treble on both has similar air and D6 being the more energetic one, has a good sparkle. Treble articulation on the D6 is more precise. Details retrieval on both is very similar. In terms of soundstage, I find both of them to have an equal width and the D6 has an added depth for a more open feel. Positioning of instruments and vocals are better on the D6. Resolution of both is very similar but D6 has the edge due to its speedy decay.

    Alpha & Delta D6 vs Mee Audio Pinnacle P2

    The P2 has more sub-bass quantity than the D6 and extension on both is very similar. The P2 has a rumble that is as quick as the D6. Bass decay on both is similar. I find the bass articulation on the D6 to be more precise. The mid-bass quantity on the D6 is slightly more with more slam. Overall dynamics increase for a more engaging listen. Transition from the lows to the lower mids are quite smooth on both. Lower mids on the D6 has similar body as the Pinnacle P2. Male vocals are being expressed without sounding hollow. The upper mids on the P2 is more forward and there is a slight crisp to it. In the treble department, D6 has more air rendered with sparkle. There is more bite on the D6. Presentation on both is clean with a good level of details retrieval. The D6 has more stage width and depth. The positioning of instruments and vocals is more accurate on the D6. Resolution on the D6 is more refined.

    Alpha & Delta D6 vs Kinera H3

    The H3 has more sub-bass quantity but it lacks the extension D6 has. The bass impact on both is present with the D6 stretching more deeply. Bass decay of H3 is slightly faster with a quick rumble. The bass note on the D6 does not hit very hard but it is being articulated with authority and control. The bass texture on the D6 is slightly smoother. For mid-bass, the D6 has more slam for increased dynamics. The lower mids on the D6 has more quantity than the H3 while the H3 upper mids is more forward. Male vocals is definitely better expressed on the D6. For female vocals, I feel the D6 has a good mastery in it while the H3 does not control it as well. In terms of treble, the D6 has a good treble body and extension. It has similar amount of air as the H3. Moving on to the soundstage, D6 has the better width while H3 has the better depth. Resolution level is very close.

    Conclusion

    The D6 is a detailed bright sounding iem that has a good mastery at the top end. Not only does it has finesse in its treble presentation, its bass note has a very good impact which helps to raise the overall dynamics. Coupled with a 8 core cable and a spring loaded design for the jack’s strain relief, the D6 has a combination of excellent build design and engaging sound signature.

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    For more reviews, visit https://audio123blog.wordpress.com/ .
  2. Cinder
    Alpha and Delta D6 Review: Built Like a Tank
    Written by Cinder
    Published Feb 16, 2018 at 1:28 PM
    4.0/5,
    Pros - Best-in-class durability, transparent and detailed sound, natural and cohesive signature, excellent accessories, visually attractive design, metal housings, 8-core SPC cable
    Cons - Occasional sharpness
    [​IMG]
    Alpha and Delta D6 Review: Built Like a Tank
    Alpha and Delta is a Singapore-based company run by audiophiles. They have been designing and selling IEMs for a good amount of time now, with their bread and butter being durability. They’ve consistently released IEMs that outlast their competitors. This year they have decided to up the ante and release a premium IEM that doesn’t compromise on their values of durability, the D6.

    You can find the D6 for sale here, on Alpha and Delta’s official website, for $95.

    Disclaimer: This unit was provided to me free of charge for review purposes. I am not affiliated with Alpha and Delta beyond this review. These words reflect my true, unaltered, opinion about the product.

    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 enjoyability 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, mid-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 D6 was powered like so:

    HTC U11 -> USB-C adapter -> earphones

    or

    Hidizs AP100 3.5mm out -> FiiO A5 3.5mm out -> earphones

    or

    HiFiMAN SuperMini -> earphones

    or

    PC optical out -> HiFiMe SPDIF 9018 Sabre DAC 3.5mm out -> earphones

    All music was served as MP3 @320Kbps or as FLAC.

    Sound Signature
    Initial Impressions:

    It’s bright. In fact, it’s the first IEM I have reviewed in a long time that prioritizes the treble this much. It can effectively be considered a reverse-L-shaped IEM as the treble comes out in front, followed by the mids which are almost evenly matched with the bass.

    Treble: Songs used: In One Ear, Midnight City, Outlands, Some Might Say, Satisfy

    An IEM such as the D6 often struggles to find the best balance between enhanced clarity and not becoming sharp and overly hot. Alpha and Delta are clearly aware of this and took certain steps to mitigate any potential sharpness that could arise from a tuning as aggressive as the reverse-L. They did an admirable job in my books: nearly every single song I listened to had a well-extended, incredibly airy presentation. I’d wager that the treble curve on this is quite similar to that of the Accutone Pisces BA, a personal favorite of mine.

    Most of the D6’s treble performance is predicated on how well the song you are listening to is mastered. Does it have lots of compression? Is it participating in the Loudness Wars? If so, the D6 will respond quite poorly. But should it be mastered by someone with even moderate skill, there won’t be any issues.

    Cage The Elephant seems to have used producers with adequate skill since the treble of In One Ear was clean, airy, and quick. Each individual hit of the cymbals and high-hats was clear and fully articulated. Same goes for Midnight City. The synths melded together well and remained clear throughout the entirety of the song.

    Treble detail retrieval is pretty damn good and is competitive with IEMs that have BA drivers in them. I am thoroughly impressed with just how clear the tiny parts of each song come through. For example, the background of Some Might Say is filled with subtle percussion instrumentation, much of which gets melted together on lesser IEMs. The D6 delivers a clean articulation these sounds.

    That said, there were occasions where I needed to turn the volume down on the D6 to avoid discomfort due to sharpness. Satisfy was definitely sibilant and hard to listen to. I’d imagine that this hotness comes from some misbehavior in the 4KHz–6KHz range.

    Mids: Songs used: Flagpole Sitta, Jacked Up, I Am The Highway, Dreams

    The D6’s mids are pretty even and have a slight rise towards the upper mids, likely to blend it with the treble. While they don’t quite have the edge of clarity that the treble has, they win terms of timbre. The D6 is almost completely transparent. It gets out of the way in a similar manner to the Earnine EN120, an IEM with the best transparency I’ve ever heard in the mids.

    I am a particular fan of the tonality the D6 gives electric guitars. The crunch on the lead guitar of Flagpole Sitta is satisfying. This property translates nicely to I Am The Highway, which benefits similarly.

    Speaking of which, the vocals of I Am The Highway were a pleasure to listen to. Their weight was a little light for me, but they were nimble and very clear nonetheless. Female vocals definitely take the lead here, if by only a small amount.

    Bass: Songs used: Moth, Gold Dust, In For The Kill (Skream Remix), War Pigs (Celldweller Remix)

    The D6’s bass is clearly tuned to suite songs like Moth over those like Gold Dust. Bass tonality is fairly linear, but there is still a small mid-bass hump. It isn’t too emphasized and lies in-line with the mids for the most part. This tuning defies the traditional consumer V-shape making for a more detail-oriented take on the lower-mids and bass. It definitely does pay off: bass guitars (which are usually mixed pretty far into the background) maintain their solidity and tonality consistently and do not get blurred out or pushed beyond audibility.

    So then are electronic songs a lost cause? Not exactly. If the songs you are trying to listen to are mastered well you will still get a reasonably aggressive bass line: I could definitely make out some mild rumble in Gold Dust, though it is certainly nowhere where it would need to be to be considered a basshead IEM. War Pigs fared similarly, though it did feel a bit shallow without the big impact bassier IEMs tend to afford it.

    Bass extension is pretty good too, with the D6 managing to push fairly low and keep up fairly well with the bass line of In For The Kill. While it did tend to lose some solidity at the lowest frequencies in the song, it never felt messy or overblown. The lower-mids retained their independence and were never smothered.

    Packaging / Unboxing
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    The D6’s packaging is minimalist but effective. While it could use a visual overhaul (replacing the plastic front face with some thick cardboard), I think that it doesn’t look too bad. It just doesn’t have that premium feel that it should.

    Build
    Construction Quality

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    The D6 uses a “bullet” shell style. It makes use of a metal alloy for the driver housings. They’re coated in a gun-metal finish. It is surprisingly light. Based on that and the hardness of the housing I think that Alpha and Delta used a zinc-based alloy.

    The nozzle is appropriately long and has a well-shaped lip. In the mouth of the nozzle rests a metal mesh that does a good job keeping out debris.

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    The cable is an 8-core SPC cable. 8-cores means that there is a certain level of redundancy within the cable that allows some of the cores to break while still allowing it to transmit the audio signal correctly. Having more cores also means that the cable can better resist pull-and-push forces.

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    The D6 has great stress relief. It is touted as designed to last, and I can definitely see that in the design of the shells. The stress relievers are functionally similar to the ones used by the AAW Q, despite their vastly different appearances. This lends me a lot of confidence in the D6’s lifespan. After all, it would be a darn shame for something of this price to break because of a bad cable.

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    The stress relief on the Y-splitter is also quite good. Between the outer plastic layer and the cable itself lies some shrink-wrap plastic. This plastic helps even out the force being applied to the cable by the stress relief; a very important component of durable braided cables.

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    The D6’s cable is terminated via a TRS 3.5mm jack. It had an additional level of stress relief as it makes use of a spring. Given that the 3.5mm jack is usually the first place that the cable beings to break, this choice was wise.

    Overall, I give the D6 a near perfect score in terms of durability. There are no apparent compromises of flaws in design. The plastic is all well finished with, the metal is hard and secure, and the cable is tough. No complaints anywhere.

    Comfort

    The D6 has some reasonably wide shells, but they don’t impact my comfort at all. That being said, those with smaller ears may have a hard time getting the D6 to seal without using foam ear tips.

    I had no comfort issues while listening to the D6 for multiple hours, nor did I have any problems with it while being active with it. While I do not recommend using an IEM like this at the gym, it can be done with relative safety.

    Accessories
    [​IMG]
    Alpha and Delta stocked the D6 well with accessories. Inside the box you will find:

    • 1x leather carrying case
    • 1x pair of removable earguides
    • 3x pairs of solid-core eartips
    • 3x pairs of smooth-core eartips
    • 2x extra pairs of standard silicone eartips
    • 1x pair of foam eartips
    • 1x leather cable clip
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    I really like the accessories that A&D chose to include. None of them feel cheap at all, and each one looks like it was carefully chosen to work well with the D6. I am especially a fan of the leather carrying case and cable clip. They are pretty well made are unique among the IEMs I’ve tested.

    Summary
    The Alpha and Delta D6 features attractive design, extremely durable construction, and a detail-oriented sound signature. The D6’s build makes no compromises, and it definitely shows. If Alpha and Delta can revise it such that it eliminates the hotness in the treble, they’ll have a huge winner. So if you’re looking for an IEM that has boosted treble, premium looks, and very high durability, but don’t mind the occasional sharpness, the D6 should definitely be on your radar. Thanks For Reading!
      PlantsmanTX likes this.
  3. crabdog
    I can see (hear) clearly now
    Written by crabdog
    Published Nov 25, 2017
    4.5/5,
    Pros - Clarity and resolution
    Comfortable and well constructed
    Included accessories
    Cons - Non-detachable cable
    DSC_0354.jpg

    Lend Me UR ears is a Singapore based retailer of personal audio equipment. The store was opened in December 2011 with a goal to “bring quality audio products to the masses and providing good customer service in the process”. They offer free international shipping and international warranty for all items purchased. LMUE also develops their own earphone brand "Alpha & Delta".

    A little over a year ago in September 2016 I reviewed the Alpha & Delta D2 (review here). My wife has been using it as her daily driver ever since and it's still in perfect condition - testament to its durability and build quality. Lend Me UR ears has long been developing a new line of IEMs and one of them, the Alpha & Delta D6 is finally ready for the people. The D6 has a clear, resolving and balanced sound that's not often found it its price range. The D6 boasts some impressive features including a Dual Air Chamber acoustic design, licensed HDSS high definition technology and Hi-res audio certified drivers. But how does that relate to the end user experience? Let's see if we can find out.

    Disclaimer

    This sample was provided for the purpose of an honest review. I'm not affiliated with the company and all observations and opinions here are my own, based on my experience with the product.

    The Alpha & Delta D6 is available from the Lend Me UR ears store: http://www.lendmeurears.com/alpha-delta-d6/ (price in Singapore dollars).

    To buy in US dollars you can go to the official Alpha & Delta webstore here: https://www.alphandelta.com/product-page/d6

    Specifications
    • Driver unit: 10mm dynamic driver
    • Impedance: 16 ohm
    • Rated power: 1mW
    • Frequency Response: 10 Hz- 40 Khz
    • Speaker Sensitivity: 105 +/- db/ mW
    • Cord Length: 1.2m silver plated copper cable (each core contains 22X 0.05 silver plated copper wires)
    • Plug: 3.5 mm
    Package and accessories
    *Note this is a pre-production model so there was no packaging included. Here is a look at the accessories that will be included with the retail version:
    • 1 pair of ear guides
    • 1 shirt clip
    • 1 pair of foam tips
    • 9 pairs of silcone ear tips
    • 1 leather case
    • 1 leather cable wrap
    DSC_0129[1].jpg

    Build, comfort and isolation
    The D6 sports metal housings in a polished, gunmetal gray color. They are of the common cylindrical shape type that is popular in IEMs with a couple of rings toward the back that serve to give the shells a more interesting appearance rather than having a plain and straight surface. On the rear of the shells is the Alpha & Delta branding and HDSS lettering. I would have liked to see the rear edge a little more rounded as it can sometimes press against the antihelix and cause hotspots. On the top of the shells towards the rear is a very pinhole sized vent/bass port and there's another at the base of the nozzle. The nozzles are of average length and width, making tip rolling easy and there's a distinct lip to hold the eartips securely. The D6 are very lightweight and look to be very durable and well built.

    DSC_0269.jpg

    Onto the cable now and easily the nicest cable I've seen on a sub $100 IEM. The white, 8 core, silver-plated copper cable is deliciously thick from the plug to the Y-split. It feels fantastic and sturdy in the hand yet is really soft and supple, so it sits well and there's no bounciness to it. There's a metal Y-split made from the same metal as the housings and the same gunmetal gray color. The strain reliefs from top to bottom are fantastic. There's a small bump on the left side where it attaches to the housings to denote the Left side. The cable terminates in an L-shaped plug, again using the same metal as the housings. There's also a substantial spring style strain relief here, similar to what you find on some Trinity Audio IEMs. It works extremely well but I feel it could have been made half as long and still be just as effective. The only downside to this cable in my opinion is that it is non-detachable but it really feels built to last and as is absolutely gorgeous.

    DSC_0344.jpg DSC_0274.jpg DSC_0276.jpg

    Comfort is good, as is the norm for this shape in an IEM and the light weight of the shells doesn't cause any burden on the ears. I found noise isolation to be about average and suitable for most situations.

    About HDSS high definition Sound Technology

    Real-time crystal clear sound without distortion

    Speakers create sound through vibration. Due to the small enclosure, the reflected sound waves can distort our music by interfering with the sound waves entering our ears. HDSS technology removes these reflected waves to ensure crystal clear sound.

    Detailed 3 dimensional sound reproduction

    The removal of reflected waves also allows speakers to disperse sound coherently, allowing for a naturally projected sound stage.

    About Dual Chamber Accoustic Design

    The dual chamber accoustic design redirects reflected sound waves into a uniquely designed second chamber which absorbs these sound waves. This reduces distortion and improves the clarity and soundstage of the earphones.

    Built like a tank- 3 years warranty

    The weakness of any pair of earphones lies in its wires. Majority of the earphones uses 4 core cable. Once breakage occurs in one of the cables, the earphones cease to function. Many earphones also do not come with sufficient strain reliefs to reinforce vulnerable areas such as the 3.5mm jack.

    In response, the D6 reinforces the 3.5mm jack with a spring loaded design. Furthermore, D6 uses an 8 core silver plated copper cable to ensure extra durability. Thus, even if wire breaks, the remaining cores will ensure the continued functionality of the earphones.

    Sound
    This is a very different beast from the A&D D2. It's more balanced and resolving across the board. The bass has more texture and definition, vocals and midrange are clearer and treble has more presence and extension. There isn't any single area where the D6 shines, it's more of a goodness across the board type of IEM. Sound is balanced and leaning slightly towards bright.

    While the D6's sub-bass has great extension it doesn't carry a lot of weight, keeping in line with its balanced approach. When it comes to mid-bass the D6 has lovely texture and definition but is consistent with the sub-bass in its mature levels. There's enough punch there to drive music and a natural, fairly fast decay that brings realism and at the same time great control. This is not an IEM for the bassheads out there but for those looking for a more even tonal presentation..

    Midrange is very tidy, its instrument separation impressive and level of clarity above average. Vocals are sweet, particularly for female vocals that get a little boost and are a real treat. Male vocals also get some love with a little weight carried over from the upper bass to give them enough richness to avoid sounding thin, yet at the same time don't sound colored. Lovers of classical music should appreciate the timbre and clarity of the D6's midrange with its slight upper midrange boost - Beethoven's String Quartets by the Emerson String Quartet sounds fantastic with these. Don't think these are limited to the classics though - "Down" by Run the Jewels sounds energetic with the vocals still managing to pop despite the tracks heavy bass.

    Treble is nothing short of excellent on the Alpha & Delta D6 for something in its price range. The extension is fantastic, providing plenty of air and detail. It's nimble and energetic but never strident or piercing. The sheen of cymbals and bells is really nice, the way they ring before fading into the distance. There's enough sharpness to grab your attention but it eases up before it becomes uncomfortable and its far reaching nature adds greatly to the dynamic range. It's clean, it's nimble and it pops.

    Soundstage here is very clean with a fair amount of width and depth. There's plenty of space between instruments which are positioned accurately enough to let you know just where they're situated. Stereo separation is another strong point and imaging is above average, the overall impression is one of clarity and detail.

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    Comparisons

    TFZ Series 4 ($99 USD)

    The most notable difference here is the bass, with the series 4 having a much more pronounced mid-bass. It's a really punchy and impactful bass which actually sounds a bit over the top after listening to the D6 for several consecutive days. The jump between the bass and midrange is more noticeable on the Series 4 - that meaty bass doesn't carry over into the lower mids, making them sound a little thin. The TFZ's thinner, boosted upper midrange gives less distinction between upper mids and treble making the top end sound less separated and lacking the separation of the D6. While the Series 4 sounds more typically V-shaped the D6's rise from low to high is more linear without the associated peaks found in the Series 4. The D6 has a more defined soundstage with superior imaging.

    Toneking 9 Tail ($125 USD)

    The TNT has more bass presence but it lacks the texture and definition of the D6. Both these IEMs are fairly balanced but where the TNT puts more emphasis on bass the D6 instead boosts the upper midrange. While the D6 has a bright personality the TNT is a smoother and more relaxed listen. Both of these IEMs have good detail retrieval but the D6 has more clarity in the midrange that gives it an edge in instrument separation. Treble on both is light and airy, the TNT being a little smoother in this area and soundstage is equally impressive on both with the D6 having a slight advantage in imaging.

    DSC_02781.jpg

    Conclusion
    The Alpha & Delta D6 was certainly not what I was expecting after my experience with the D2. The D6 has a much more refined and mature tuning and is definitely a big step up in terms of technical performance.

    With its mature tuning the D6 is a more serious offering from A&D that aims more towards transparency and resolution compared to the D2's fun and relaxed approach. The D6 impresses not only with its clarity and detail but also with soundstage and imaging. Anyone looking for something more balanced and less V-shaped than the typical offerings in the $100 range should take a look at the Alpha & Delta D6. It offers a solid build and great sound and comes with a very impressive 3-year warranty.

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