New toys Sunday #22 – Cayin Edition

One of the biggest mistakes I made after getting drawn into the Head-Fi rabbit hole was not paying enough attention to the source devices I was using!

When I started getting into the hobby, I was mainly experimenting with more moderately priced gear, especially IEMs. DAPs were much more of an afterthought. Whenever I was looking for the next thing to try, most of my attention went towards the IEM itself, while the source was often treated as something that would simply “do the job”.

I know better now and I suspect that some of my dissatisfaction over the years was simply down to not having a source that was good enough to make my ears happy.

Even just a few days ago, the Watercooler community ran a small poll around source devices – the importance of the full chain when evaluating audio quality – and it was a good reminder of something I have gradually come to appreciate: the source plays a much bigger role in how we experience an IEM and ultimately the music itself than I used to give it credit for.

One of the most impressive DAPs I have owned in this regard was the N30LE, Cayin’s 30th Anniversary edition. Leaving the sound aside for a moment, which I will come back to shortly, the build quality of that thing is simply exceptional. Whether something like the EvoAria Ti or CU comes close is probably debatable, but for me, they don’t quite reach that same level.

The newest release from Cayin very clearly follows in the footsteps of its predecessor. N8iii carries quite a bit of that N30LE DNA, particularly when it comes to the ambition behind its sound and architecture, but Cayin has also made some compromises along the way, fortunately not in sound

Compared directly with the N30LE, the build and perhaps even more noticeably the packaging and accessories feel a little less extravagant. That is not necessarily a bad thing. After all, some of what made the N30LE so special was also what made it such a beast of a device and at the same time, not exactly the best all rounder.

The N30LE has a very particular architecture and, importantly, its analogue and tube implementation is a big part of its sonic identity. So much so that, even though I absolutely loved it for what it did, I eventually ended up selling it for pretty much the same reason.

As a side note , I tend to prefer bass elevated, denser and fuller lower mids with a richer overall presentation and N30LE definitely delivers on that front. It was one of those DAPs where the character of the source was always very apparent … maybe even too apparent in many cases 

Before deciding to give the N8iii a chance, I also had the SP4000 for a short while, which Luc already shared his impressions of here: Mikaik Audio – Astell&Kern Edition.

The reviews, combined with a few days of listening when I had the SP4000 at home from a friend, eventually made me want to give it a try myself.

I have always liked Astell&Kern, and the SP4000 is, in my opinion, one of their best DAPs to date. It has a more potent amp section than the SP3000, a fuller yet still very much reference-oriented tuning, and, as you would expect from A&K, an outstanding level of build quality.

What made me sell it relatively quickly had very little to do with its sound performance or the lack thereof. In fact, I really liked what it did with mainly any IEM I listened to with it. The main issue for me was the battery life, combined with the fact that I felt I was missing part of the sound I knew the DAP was capable of delivering when DAR was disabled. Why would I disable DAR, you ask?! Well… mostly because I like my freedom. 😄

I don’t really want to own a DAP that needs to be hooked up to a charger on a constant basis just to get the performance I am looking for. For a portable device, battery life and being able to actually use it without constantly worrying about the next charge matter quite a bit to me.

Coming back to N8iii, and yes – the battery performance issue experienced with the SP4000 is fully addressed –  I initially had a bit of a bias. I honestly expected the N8iii to be more or less “the same old thing”, just with a few new tricks and some gimmicks added here and there. To my surprise, I was wrong and I am very happy I was.

The biggest difference between the N8iii and some of the other DAPs I have owned would be that it doesn’t feel like a source that is simply trying to impose its own character on whatever IEM is connected to it. It has a character, absolutely, but there is enough resolution, control and transparency underneath it that the IEM still gets to speak for itself.

N30 LE – elegance and beauty in the flesh

Cayin N8iii – the understated newcomer

So, where does the Cayin N8iii improve on the N30LE, and what exactly has Cayin done differently this time?

Cayin N8iii vs N30LE — technical specifications:


Cayin N8iiiCayin N30LE
DAC2 × AK4191EQ + 4 × AK4499EX2 × AK4499EQ
DAC architecture4-channel fully balanced, parallel/monoDual mono, 8-channel differential
Tube2 × Korg 6P1 Nutube, 6th gen2 × Korg 6P1 Nutube
Tube implementationFully balancedFully balanced
Tube modesClassic / ModernClassic / Modern
Solid-state modeYesYes
AmplifierFully balanced 4-channel discreteFully balanced discrete
Amp modesClass A+ / Class A / Class ABClass A / Class AB
Power modesP / P+ + HyperP / P+ + Hyper
Max balanced output1,285 mW~1,100 mW*
Max SE output900 mW~500 mW*
PCMUp to 32-bit / 768 kHzUp to 32-bit / 768 kHz
DSDUp to DSD512Up to DSD512
Internal storage256 GB256 GB
microSDUp to 2 TBUp to 1 TB
RAM8 GB8 GB
SoCSnapdragon 665Snapdragon 665
OSCustomized AndroidCustomized Android 12
Display6″ FHD6″ 2160×1080
Battery13,500 mAh12,570 mAh
Weight~580 g~650 g
Bluetooth5.05.0
Wi-FiDual-band2.4/5 GHz
3.5 mmSE / LO / PODedicated SE PO + shared LO/PO
4.4 mmBalanced / LO / PODedicated balanced PO + shared LO/PO
Digital outUSB / S/PDIF / I²SUSB / S/PDIF / I²S
Launch price$3,999$4,999
ProductionLimited to 500Limited to 300

The connectivity is also very well thought out, and pretty much everything I could want from a DAP is here:

  • 3.5 mm PO — single-ended headphone output
  • 4.4 mm PO — balanced headphone output
  • 3.5 mm LO / Pre-Out — single-ended analogue output
  • 4.4 mm LO / Pre-Out — balanced analogue output
  • USB-C — charging, data, USB Audio, and digital output
  • I²S — digital output
  • microSD — music storage
  • Wi-Fi + Bluetooth 5.0 for wireless connectivity 

The N8iii has quite a few tuning options, which is obviously a good thing, although I generally prefer a more “one and done” approach rather than constantly tinkering with sound settings. This is also one area where the N8iii genuinely surprised me. I have never really been a tube guy, and I always thought a good quality solid-state implementation was all I needed. Well… apparently not.

Cayin has managed to improve the N8iii in quite a few areas compared to it’s predecessor and the DAPs solid-state performance is definitely one of them.

With the N30LE, the presentation was so full and authoritative that I often had the feeling that every IEM sounded good with it. Not necessarily because every set was actually better, but because the flavour the N30LE injected into the sound was so strong that, at times, the DAP and the IEM almost started to blend together. It became harder to tell which qualities were coming from the IEM and which were coming from the source.

With the N8iii, Cayin manages to retain that musicality while pushing the resolution and detail further. There is excellent clarity, plenty of detail, powerful and well controlled bass, very good treble extension, and the mids have a really nice quality to them with a touch of warmth. It is one of those presentations where I can simply listen and enjoy the music rather than thinking about what the DAP is doing.

The stage is already impressive in solid state, but this is where the tube modes add another layer to the presentation. Everything seems to open up a little more, with more width, depth and overall atmosphere. The mids, in particular, become a little less weighty and more transparent. Maybe this is what people mean by “tube magic”.

On the N8iii in Tube Timbre Classic, while the overall presentation becomes denser, the mids themselves feel a little less weighty and more transparent to me. It’s as if the additional tube density comes more from the space and atmosphere around the notes rather than simply adding more body to the mids. The trade-off is that the bass loses some of its grip, punch and authority compared with solid-state, becoming softer and slightly more diffuse.

“Diffuse” is probably the best word I can think of to describe the difference I hear when switching from SS to tubes. It is not necessarily worse, just different. Everything becomes a little more relaxed and spread out.

Tube Timbre Modern is probably the middle ground for me. It keeps some of the density and spaciousness of Classic, while retaining more of the control and punch of solid state.

So, in very simple terms:

Solid-state: tighter, punchier, cleaner, more dynamic, with excellent bass authority and a special sense of density.

Tube – Classic: richer, wider, more spacious and atmospheric, but slightly softer and more diffuse, particularly in the bass.

Tube – Modern: somewhere in between.

Interestingly, I have actually started to enjoy tubes more since getting the N8iii. That wider stage and rich, three-dimensional, atmospheric presentation can be quite addictive, especially considering that the trade-offs are relatively small for what you gain in return.

Solid state remains the more technically precise option, with greater bass authority and a more controlled presentation. On the other hand, the tube modes bring something that SS simply doesn’t have: a more expansive stage, greater atmosphere and that little bit of “tube magic” we all love.

Having the ability to switch between the two with the press of a “button” is simply fantastic. It gives the N8iii a level of versatility that few DAPs can match, and, to me, it is also a great demonstration of Cayin’s experience and the amount of work that went into creating a device like the N8iii.

New toys Sunday #19 – Astell&Kern Edition

Astell& Kern was the first company that made me desperately want a product. It was the beautiful, but somehow ill-fated SP2000T. Launched after the excellent SP2000, and affected by the shortage of AKM chips, dues to the fire of 2000, Oct 20th-23rd, when the Asahi Kasei Mycrosystems factory was severely damaged, the SP2000T did ot manage to achieve the same fame as its predecessor. It sported ESS ES9068AS in QUAD-DAC configuration and Korg Nutube 6P1 and to my ears it sounded really good. Once I’ve heard it, at the Munich HighEnd show, there was no going back.

Fast forward to 2026, Astell&Kern DAPs have been a constant presence in my sources line-up, maintaining a stable 2 pieces at any time (SP2000T, S3000T, SP3000, SR35, Activo P1, all were part of my line up at various points in time. The current line up is SR35 and SP3000. They share the stables with the amazing Nipo N2.

Recently, a good friend lent me his SP4000, which shakes my conviction that the SP3000 is the best DAP for me.

The cold facts:

Specification / FeatureA&norma SR35A&ultima SP3000A&ultima SP4000
Product SeriesA&norma (Compact / Standard Line)A&ultima (Flagship Line)A&ultima (Flagship Line)
DAC ArchitectureQuad CS43198
• 4× Cirrus Logic CS43198
• Quad/Dual DAC switching mode
HEXA Audio Structure (1:2)
• 2× AKM AK4191EQ (Modulator)
• 4× AKM AK4499EX (Dual + Dual DAC)
• Physical digital/analog separation
1:1 Octa Audio Structure
• 4× AKM AK4191EQ (Modulator)
• 4× AKM AK4499EX (True Quad DAC)
• 1:1 direct modulator-to-DAC pairing
CPU / System SoCQuad-Core CPUQualcomm Snapdragon 6125 Octa-Core (8GB DDR4 RAM)Qualcomm Snapdragon 6125 Octa-Core (8GB DDR4 RAM)
Operating SystemProprietary AK OS (Crimson UI Theme)Proprietary AK OS (Crimson UI) on launch, later updated to full AndroidFull Android OS Integration + Google Play Store with Astell&Kern Direct Path (ADP) bit-perfect streaming
Chassis / Body MaterialAluminum (Charcoal Gray)Stainless Steel 904L (Silver, Black) / 99.98% Copper / 24K Gold / PlatinumStainless Steel 904L (Silver, Black) / 99.98% Pure Copper Limited Edition
Display3.6-inch HD (720 × 1280) Touchscreen5.46-inch Full HD (1080 × 1920) Touchscreen6.0-inch 2K (2160 × 1080) Touchscreen
Supported Formats & Native DecodingUp to PCM 32-bit / 384 kHz
Native DSD256 (11.2 MHz)
MQA full decoder
Up to PCM 32-bit / 768 kHz
Native DSD512 (22.4 MHz)
MQA full decoder
Up to PCM 32-bit / 768 kHz
Native DSD512 (22.4 MHz)
Signal-to-Noise Ratio (SNR @ 1 kHz)• Unbalanced: 127 dB
• Balanced: 130 dB
• Unbalanced: 126 dB
• Balanced: 130 dB
• Unbalanced: 129 dB
• Balanced: 131 dB
THD+N (@ 1 kHz)• Unbalanced: 0.0005%
• Balanced: 0.0006%
• Unbalanced: 0.0006%
• Balanced: 0.0004%
• Unbalanced: 0.0005%
• Balanced: 0.0003%
Crosstalk (@ 1 kHz)• Unbalanced: -133 dB
• Balanced: -145 dB
• Unbalanced: -136 dB
• Balanced: -145 dB
• Unbalanced: -136 dB
• Balanced: -145 dB
Output Level• Normal:Unbal 2.1 Vrms / Bal 4.0 Vrms
• High: Unbal 3.1 Vrms / Bal 6.0 Vrms
• Unbalanced: 3.3 Vrms
• Balanced: 6.3 Vrms (No Load)
Unbalanced 4.1Vrms │ Balanced 8.2Vrms (Condition No Load)
Audio Outputs• 3.5mm Unbalanced
• 2.5mm Balanced (4-pole)
• 4.4mm Balanced (5-pole)
• 3.5mm Unbalanced / Optical Out
• 2.5mm Balanced (4-pole)
• 4.4mm Balanced (5-pole)
• 3.5mm Unbalanced (0.7 Ω) / Optical Out
• 4.4mm Balanced (1.7 Ω, 5-pole)
Key Acoustic Technologies• Dual/Quad DAC Switching
• 2-Step Gain Control
• ReplayGain
• AK File Drop
• TERATON ALPHA
• DAR (upsampling up to 384kHz / DSD256)
• 6 DAC Filters
• Crossfeed
• ReplayGain
• AK File Drop
• Advanced DAR 2.0 with VSE (Virtual Sound Extender)
• ESA (Enhanced Signal Alignment – Group Delay Reduction)
• Ultra-Low Noise LDO Regulator (97% noise reduction)
• 99.9% Pure Copper Shield Can
• Any Layer HDI PCB
• 6 DAC Filters
• Crossfeed & ReplayGain
Built-in / Expandable Storage64 GB NAND / microSD slot (up to 1 TB)256 GB NAND / microSD slot (up to 1 TB)256 GB NAND / microSD slot (up to 1.5 TB)
Wireless & Streaming• Dual-Band Wi-Fi (2.4 / 5 GHz)
• Bluetooth 5.0 (LDAC, aptX HD)
• BT Sink
• Roon Ready
• Dual-Band Wi-Fi (2.4 / 5 GHz)
• Bluetooth 5.0 (LDAC, aptX HD)
• BT Sink
• Roon Ready
• Dual-Band Wi-Fi (2.4 / 5 GHz)
• Bluetooth (aptX Adaptive, LDAC, BT Sink)
• Full Google Play streaming apps
• Roon Ready
Battery & Charging• 3,150 mAh Li-Polymer
• Up to ~20 hours playback (Dual DAC mode)
• ~2.5 hrs charging (5V 2A)
• 5,050 mAh Li-Polymer
• Up to ~10 hours playback
• ~3.5 hrs charging (Qualcomm QC 3.0)
• 6,780 mAh Li-Polymer
• Up to ~10 hours playback
• ~5 hrs charging (Qualcomm QC 3.0)
Dimensions & WeightCompact handheld form factor• 82.4 × 139.4 × 18.3 mm
• ~493 g (SS)
• 85.0 × 149.8 × 19.5 mm
• 615g (SS)

The first ting one notices about the SP4000 is the imposing physical presence. While not as thick as some of the most famous DAPs (looking at you, N30LE), this is one hefty device. It’s also big, with a wonderful, bright screen. Just like other AK models, it has sharp corners, potentially turning its use without a case into a sort of BDSM experience. Be advised! Also, because the volume wheel doubles as the power button, it moves freely, to the point of feeling a bit flimsy, a feature carried over from the SP3000. While not my favourite volume wheel, it works well and my SP3000 is carrying its age with dignity so I have no reasons to believe the one on SP4000 would be any different.

The SP3000 has a neutral sound, with one of the leanest bass presentations, dead neutral mids and with a delicate and intricate treble delivery. One of the crispest, clear trebles I’ve encountered. The sound density is not very high, giving most IEMs ample space to breathe, and creating a large stage with or without DAR activated. The image and layering are very good. It works best with densely sounding IEMs, like the Mysticraft Tet, NGaudio Erebus, etc. but it sounds underpowered with monsters like Storm or Elysian X.

SP4000 follows the same path of neutrality, but it has a denser sound and the treble is less “grating”. While the presentation is more technical, it feels like there is less air in between instruments, making DAR a must for most IEMs. Without it, the amount of information is overwhelming, making it less pleasurable for me, compared to its predecessor. The bass and lower mids carry more grunt, without necessarily sounding elevated, being a clear departure from warm DAPs like N30LE, while clearly more muscular than SP3000. One caveat here is the High Driving Mode (HDM). With IEMs like Storm, Pentara, Elysian X, SP4000 in Normal Driving Mode felt lacking in dynamics. With one tap, though, things change dramatically, as HDM brings about improved macro and micro dynamics, pumping life into even the most demanding IEMs.

I find SP4000 to sound more detailed than SP3000 in the most part of the spectrum, with more texture and a tighter packing of the sound. With most IEMs, bass control is stricter, note weight is improved over SP3000, but there is a key area where SP3000 outshines the SP4000, and that is treble. With most of my library composed of varieties of rock, from mellow to extreme death metal, jazz and some older pop, I place a lot of value onto hearing the cymbals loud and proud. Occasional splashiness does not bother me. The way SP3000 presents the treble, with a good combination of body, shimmering and crispiness, remains unmatched to my ears. At least with some IEMs, like Oriolus Traillii JP, Erebus, UMxMusicteck Pentara.

For IEMs with slightly thinner notes, SP4000 is a gift from heaven, adding just enough meat on the bone, without altering the overall tuning.

One interesting find is the Mysticraft Tet, which is one of the thickest sounding IEMs, matched maybe only by the Epic Audio Intoxication. I would have expected it to sound unbalanced on the SP4000, but it is quite the contrary. Maybe through tighter control, maybe via dark magic, SP4000 makes is shave off some weight, elevating the sound, while maintaining the mid range lushness and bringing the treble more forward spatially. A highly recommended match.

In terms of functionality, the two A&Ultimate DAPs are now identical, since the SP3000 has also been updated to full Android. Funny enough, SP3000 boots up a bit faster than SP4000, but the difference is diminutive.

Upgrading from SP3000 to SP4000 makes sense if you have hard to drive IEMs and don’t want to use an external amp or if you favour a dense(r) sound. Personally, I am going to stick to SP3000 for a bit longer…but the edge is really tiny.