DSD capable DAC with integrated headphone amp and preamp functionality

Yulong Audio DA8 II

Average User Rating:
5/5,
  • DSD capable DAC with integrated headphone amp and preamp functionality

Recent User Reviews

  1. earfonia
    5.0/5,
    "Successful Refinement of Yulong DA8"
    Pros - Excellent sound quality from both DAC and headphone amplifier, Powerful headphone output, User friendly design, Very stable Windows driver.
    Cons - Display quality might not be the most durable type, Tight headphone socket, No display differentiation for DSD64 & DSD128 both displayed as DSD only.
    This review is the summary section of Yulong DA8II in-depth review here:
    http://www.head-fi.org/t/779702/yulong-da8ii-in-depth-review
     
    Please visit the above thread for more information.
     
     
     
    Many thanks to Yulong and Qubes Audio Singapore for the loan of Yulong DA8ii demo unit!
    I had the demo unit for more than a month for proper review and comparison with other desktop DACs.
     
    http://www.yulongaudio.com/en/product_detail.asp?pid=48
     

     
     
    I have the previous model, Yulong DA8 for more almost 2 years now, and it has been one of my favourite and reference DAC+Amp combo. The powerful and smooth sounding 1 watt discrete class A headphone amplifier makes it one of the best one box solution in its class.
     
    Instead of increasing the model number and releasing DA9, Yulong launched DA8ii, as the improved version of the successful DA8. While still using the same SABRE ESS9018 DAC chip, the following are the improved components in DA8II:
    Low phase noise Crystek CCHD-950-25-100 audio crystal oscillator, fine-tuned power supply, Low Pass Filter (LPF), and headphone amplifier.
     

     
     
    Look and Feel:
    Overall they look quite similar, with the same size and design. The whole unit feels really solid and well made. The front panel is made of thick aluminium plate, which seems to be the classic trend for high end audio equipment. Beside the additional 'II' on the model, the only difference in the design is the volume knob that looks slightly different than DA8. Other than that both DA8 and DA8II basically look similar. Both are available in black and silver. The 2.4 inch colour LED display still looks the same as Yulong DA8 color LED display. The display quality of my Yulong DA8 starts degrading after 1 year of frequent use. After around 1.5 years, the edges of the display started to get brightened and bright lines started to show up. It can be easily repaired, but more durable type of display is preferable. Though the graphic might not look as good as Yulong LED display, simple monochrome LED display like the display for Mytek Stereo192-DSD and Geek Pulse XFi will most probably more durable and last longer than the type of color LED display used in DA8 and DA8II. But to be honest, though they look the same as DA8 display, I don't have any information from Yulong if the type of LED display in DA8II is the same as the one in DA8, or if DA8II is now using the better type. In practical, I rarely use the display other than checking the sampling frequency, to make sure it is matching the sampling rate of the recording being played. So I would say it is something minor, but I would like to share my experience here. Besides that, DA8II looks and feels solid, and the build quality is simply excellent, proven by almost 2 years of using DA8.
     

     
     
     
     

    Summary

    Yulong DA8II is a refinement of the already excellent product, Yulong DA8. Refinements that bring DA8II to a more neutral sounding DAC+Amp, as compared to the mildly warm sounding DA8. Most noticeable improvement is in the speed and transient that DA8II is superior to DA8, while still maintaining natural sound signature without any unnatural exaggeration in detail and clarity. Detail and dynamic are now presented in a more lively and natural manner. One of my favourite signatures from Yulong DA8II is that it has high detail resolving power without sounding analytical. Tonality is now closer to neutral, but not yet stepping into analytical territory. Bass is punchier and faster, midrange is more or less similar with slightly better texture, and treble is slightly more transparent. The smooth sounding signature is still retained, but now presented as 'smooth-transparent' instead of 'smooth-warm'. From my observation comparing Yulong DA8II with Yulong DA8, Mytek Stereo192-DSD, and Geek Pulse XFi, and tested it with many headphones, I come to a conclusion that Yulong DA8II has neutral sound signature, more or less comparable to Mytek Stereo192-DSD line output signature. Not analytic, not warm, but neutral. The refinements in DA8II bring it closer to neutral, reference type of sound signature, lively dynamic, while retaining the DA8 musicality. Kudos to Yulong!
     
    All subjective listening tests were done with ‘Slow’ filter and Jitter Eliminator set to bypass. Though I almost cannot hear the difference between Jitter Eliminator ON and bypass, I feel that bypass setting is a tad livelier. The following is simplified comparisons between the 4 DACs headphone output sound quality subjective listening test, from most preferred to less preferred, top to bottom:
    Yulong DA8II & Geek Pulse XFi. Quite different sound signature, but comparable in perceived quality.
    Yulong DA8. Only very slightly behind DA8II sound quality, with slightly less transient speed and clarity.
    Mytek Stereo192-DSD. Sounds rather thin, lacking bass and midrange body. Highest perceived hiss noise on sensitive IEMs.
     
    As for the line output sound quality, honestly, after testing the DACs with different amplifiers and headphones, they kind of have their own unique signature that may sound excellent and enjoyable with matching setup. It is hard to make simple judgement which one sounds best. All DACs line output sound really good and more or less comparable in quality, while having their own unique sound signature. So I rather summaries their unique sound signatures, than voting a winner.
     
    Yulong DA8II and Mytek Stereo192-DSD are the most neutral sounding of the four. Yulong DA8II tonality is quite comparable to Mytek 192-DSD tonality. DA8II sounds a tad smoother than Mytek 192-DSD especially on the high frequency, like a tad more refine with slightly better instrument separation, while Mytek 192-DSD sometime may sound a tad dryer, like there is a slightly more emphasize on detail and transient. But the difference is quite small, and they are more or less comparable in overall sound quality. Yulong DA8 sounds pretty close to Yulong DA8II sound signature, slightly warmer with fatter bass, while DA8II has better transient, texture, and transparency. LH Geek Pulse XFi, like the DA8, is on the warmer side of neutral, with fatter, stronger bass than DA8II, slightly fatter than DA8 as well, with sweet smooth warm signature, and slightly more laid back in presentation. Geek Pulse XFi also has slightly less perceived level of detail when compared to DA8II, could be due to the smooth warm signature. I prefer to use Geek Pulse XFi for brighter and forward sounding headphones. While warmer sounding amplifiers and headphones will probably find better matching with Yulong DA8II.
     
    Mytek is stronger on the features for professional audio application with more comprehensive volume control features, so more suitable for pro audio application which requires more comprehensive features. But when looking for a neutral sounding DAC + headphone amplifier, but due to the much better headphone amplifier quality, Yulong DA8II is the better one box solution for headphone system.
     
    Sound quality wise, in my opinion, Yulong DA8II deserves 5 stars rating, at least for this price category.
     
     

     
     
     
     

    Pros:

    1. Excellent sound quality of both DAC and headphone amplifier sections.
    2. User friendly design. Features are directly accessible through dedicated buttons, instead of digging into menus.
    3. Amplifier bypass feature for the line output, for pure DAC mode.
    4. Very good volume knob turning response.
    5. Very stable Windows USB driver.
     
     

    Cons:

    1. Probably using the same type of colour LED display as Yulong DA8, which from frequent use might start to degrade from as early as 1 year.
    2. Very tight headphone socket. Probably only when new, and will get loosen after some use.
    3. No indicator on display for different sampling rate of DSD format. Both DSD64 and DSD128 playback are shown as DSD.
     
     

    Suggestion for Improvements:

    1. To use a more durable and lasting display quality.
    2. Display can be totally turned off after a certain period to save the lifespan of the display. And to use power switch with light like on Yulong A28, to indicate that the DAC is on, when the display is off.
    3. Additional digitally-controlled analogue volume control feature beside digital volume control, using digitally-controlled analogue volume control chip such as PGA2311. Something like what Mytek Stereo192-DSD offers would be excellent, offering the choice of both digital and analogue volume control, with 2 independent volume controls for line output and headphone output.
    4. Dedicated ‘Mute’ button.
    5. Balanced headphone amplifier.
    6. DSD256 and DSD512 support.
    7. USB compatibility to Yulong U200 Wi-Fi module, for lossless Wi-Fi music streaming.
    Pokemonn likes this.
  2. project86
    5.0/5,
    "Evolution of a quality device"
    Pros - Takes the original and improves clarity, timing, and transparency
    Cons - Review unit has printing error which inverts the labels for two (rarely used) buttons

     
     
     
    If you visit HeadFi on a semi-regular basis, you've likely encountered some reference to Yulong Audio and their high-value DAC and headphone amp products. They might not be a household name but they have grown substantially in the last few years, and to my mind they are an ideal representation for the quality of gear coming out of China these days. Many of the big name brands of audio gear have their stuff made in China anyway... perhaps more companies than would care to admit it. So there's really no reason why Yulong can't be just as good. I do recognize the dearth of no-name gear coming from the region - eBay DACs for $60, clone headphone amps using very obviously inferior parts, etc. Those things exist in a class by themselves and really don't deserve to be mentioned in the same sentence as brands like Yulong. Personally I don't care if gear comes from Germany, China, Texas, or wherever, as long as it has something to offer.
     
    Over the years Yulong has ventured into higher-end territory. Their DA8 (which I reviewed HERE) was a fantastic all-in-one device and was very competitive in its class. I'm using the past tense as Yulong recently discontinued that model, replacing it with the DA8 mkII. I've been spending time with the mkII and I do find it worthy of discussion. Surpassing an already excellent product like the DA8 is no small feat. When the original already sounded great and supported pretty much any format one might throw at it, what could possibly be left to update? That's the situation Yulong seems to be in, and it explains why the DA8 mkII is more of an evolution than a revolution.
     
     

     
     
    From an outside vantage point, the DA8 II appears nearly identical to its predecessor. The only thing I spot is the new DA8 II lettering along with a different volume knob. Aside from that, everything else carries over. Lest you think there was room for easy improvement, let's recap those features - we get balanced and single-ended outputs with defeatable volume control, the usual inputs including optical, coaxial, AES/EBU, and USB (DSD and DXD capable), a powerful headphone output, selectable filters, an OLED display... there's not a whole lot missing. The main thing that springs to mind is a remote control, which sadly is still not implemented here. This keeps it from being an option in some systems, mostly those based around speakers rather than headphones. I'm not quite sure why Yulong didn't feel this was worth doing. My particular review loaner, as an early model, has a labeling issue where the printing for "Filter" and "Phase" buttons are swapped. I don't know if this will be the case on production models or not - I assume it will be taken care of, though honestly I could deal with it as-is. EDIT: I've confirmed with Yulong this issue was fixed in the production run. So nothing to worry about. 
     
     
     

     
    Inside is where we find the biggest changes. Let's again recap the existing design: ES9018S DAC chip running in quad-mono mode. Amanero Combo384 USB solution customized by Yulong for complete power isolation from the USB line. Linear power supply featuring a nice Plitron toroidal transformer with multi-stage voltage regulation. Powerful headphone amplifier with discrete class A buffer. So far so familiar right? The major change in the new model is the swapping of the critical system clock. The original model already used a quality low phase noise clock, but the mkII upgrades to one of the best oscillators available: the Crystek CCHD-950. This pays dividends which I'll discuss shortly. Beyond that, Yulong also did some tweaking of the headphone stage, the power supply, and the low pass filter, for a cumulative result somewhat larger than one might initially think. Again, it's not a completely new sound, but rather builds on the already excellent performance of the original and takes it up another notch.
     
     

     
    I have to pause for a quick word about the modified Amanero Combo384 USB board. This thing is absolutely rock solid, up there with the best XMOS-based implementations I've experienced. Due to Yulong's customization where it draws all power from the DA8 II power supply, it doesn't care about external power at all. Not only does this allow for power isolation by using special cables (Elijah Audio sells one, or just cut the power leg on any other USB cable), but it also seems far more agreeable to connect with a tablet or phone. I've tried a half dozen devices and had success with all, which is certainly not something I can say for most USB DACs. It also renders add-on USB power scrubbers completely unnecessary - I tried a Schiit Wyrd and an iFi iUSB, but got zero improvement either way. You'd think that by 2015 we'd have nothing but solid USB implementations across the board. But go talk to someone with a DAC using the VIA or Tenor or Cmedia solutions and you'll find out quirks abound. I often mention XMOS as probably the best on the market but I have to say the Amanero is an excellent alternative, and I wouldn't mind seeing more designers make use of it.
     
     
     

     
     
    The Setup
    Believe it or not, I did a lot of my initial listening with the DA8 II being fed by an Android device. I've been messing with a big Acer all-in-one thingy with a nice 21.5 inch 1080p display, relatively powerful Celeron CPU, 2GB RAM, and 500GB hard drive. I know, it's ancient technology compared to the specs on the latest Samsung Galaxy S, but it's actually pretty solid for my needs. And unique too - the uncommonly large hard drive is perfect for storing tons of music. I run the free HibyMusic app which allows use of external DACs, as well as playback with nearly all formats including hi-res PCM and DSD. This makes for a killer "bedside" type rig, and also serves as a perfect test of DAC's ability to deal with what I can only assume is a sub-par source. As a reasonably priced all-in-one device, a clean power supply is not really on the menu. With all those components packed tightly together plus a traditional spinning platter (non-SSD) hard drive and a basic wall-wart power supply, jitter and USB noise are likely not pretty. Sort of a worst-case scenario compared to any other option I have available. I used an old Belkin Gold USB cable with the power leg removed, and took advantage of Yulong's integrated amp to drive my AKG K812. 
     
     
     
    The Sound
    The resulting sound was completely satisfying. I didn't know what to expect considering the transport being used, but this was something I could happily enjoy for hours on end. I've been really into jazz lately, so I started with the oddly-named but oh-so-well-recorded Sophisticated Lady jazz quartet from Yarlung Records. Their Native DSD Volume 1 was able to retain its "live" character, transporting this listener to a small jazz club for approximately 32 minutes. I particularly enjoyed JJ Kirkpatrick's trumpet solo on the opening track - this system presented it in stunning fashion, its brassy tone being very articulate. The original DA8 has a somewhat smooth, analog presentation, and while the new version continues in that same spirit I'd say it has superior extension. It better captures the brightness of the trumpet, without becoming so bright as to offend the ear. On direct comparison (or as close as I could get with switching cables back and forth) the original DA8 seemed a little muffled and closed in. I've always been quite satisfied with the first DA8 but I must admit the new model takes things a step further in terms of realism.
     
     

     
    I used the DSD128 version of the album because that's what I happen to own - the DA8 II can supposedly handle DSD256 as well, but I have yet to test that. In this particular configuration I preferred the jitter eliminator feature active. Turning it off gave a softer sound that lacked clarity and didn't engage me quite as much. The filters are more suble - with DSD playback, it offers a choice of cutoff frequency at 50, 60, or 70kHz. To be perfectly honest I can't really notice a consistent difference between the three, so I stopped trying. PCM playback gets a choice of two filters which make a slight bit more difference, though still not huge. I found that I liked the "sharp" filter in this particular system, as it seemed to give better transient snap. The "slow" filter was slightly more laid back which might sometimes be preferable but not in this instance. 
     
     

     
     
    I listened to this system for a long time and was never less than impressed. It didn't matter if I played DSD, 24/192 PCM, or basic redbook quality files; the result was always pleasing. While not offering the same fidelity as my main system, it did a great job considering the rather basic, non-audio oriented transport. I swapped in Audeze LCD-2, Sennheiser HD800, Ultrasone Edition 12, and Grado PS500, all of which sounded quite good from the integrated headphone output. It won't drive my HE-6, but aside from that everything else is fair game. I noticed an increase in overall competency from the revamped amplification stage - slightly quicker, more transparent, though obviously it's hard to separate the improvement as being caused by the DAC or the amp improvements. For a compact, simplified system, I couldn't ask for much more. 
     
    Spinning Discs
    Later I brought the DA8 II into my main system and fed it via coaxial connection from my YBA Design WM202 CD player. Obviously this system only allows for standard CD playback and omits any hi-res capabilities. Nonetheless I thought it did a slightly better job than the Android-based setup when given the same material. I love me some hi-res PCM but even "lowly" 16-bit/44.1kHz can sound absolutely stunning. See Cassandra Wilson's Belly of the Sun for a great sense of depth and clarity. See Breaking of the World, the latest from retro prog-rock masters Glass Hammer, for warmth and punch courtesy of mastering engineer Bob Katz. See New Favorite by Alison Krauss and Union Station for an ultra-natural presentation - recorded in "Pure DSD" and mastered by Doug Sax, this is a must have in any format. This time around I kept the jitter eliminator engaged but the filter switched to "sharp", as it seemed to bring out the most potential from the disc spinner. 
     
     

     
    I then threw together a little system to help me go back and forth between the YBA Design WM202 as transport feeding the Yulong, and the YBA alone using its analog ouputs. This $1,100 CD player sounds quite respectable all by itself, so I use it as a sort of gatekeeper to separate the good external DACs from the great ones. Unfortunately, I don't currently have a higher-end headphone amp on hand with multiple RCA inputs for quick A/B comparisons. So I ended up using the NuPrime DAC-10H (which does have multiple RCA inputs) as a preamp, then out to a Violectric V281 driving Sennheiser HD800 or HiFiMAN HE-1000. This kept things honest - I could have fed the Violectric directly via RCA from the CD player and then via XLR from the Yulong, but that's an unfair comparison which also makes level matching very difficult. 
     
    With the NuPrime in the mix I was able to go back and forth with ease. I discovered the Yulong had a more weighty presentation. It dug deeper and hit harder on the low end, while the YBA sounded a bit thin in comparison. I also noted some etch on female vocals which was all but eliminated on the DA8 II. Soundstage was bigger, more open and layered, with a very convincing sense of space. The YBA was more direct, which at times made for a pleasing alternative (particularly with intimate vocal performances) but generally wasn't as realistic. Overall I'd call this a fairly substantial upgrade, if not quite night and day. Pretty impressive considering the Yulong doesn't cost all that much more than the YBA. 
     
     
    Taking It Higher
    Finally I went upscale by a significant jump, feeding the Yulong with a B.M.C. PureMedia via USB. PureMedia is a purpose-built media player with exceptional sound quality. It's among the best transports I've ever had in my system, allowing me to get a sense of just how high the DA8 II will scale. Even CD quality recordings mentioned earlier sounded that much better - more open, more airy, more "real" for lack of a better word. With the B.M.C. in place I was able to hear the largest improvement over the original Yulong DA8. I used XLR outputs to my custom made KGSShv electrostatic amp, powering Stax SR-007mkII or SR-4070. With this revealing setup, I could hear how the new model makes the original sound a bit slow, dull on top, less focused, and less precise. It holds together better during complex passages. And the midrange seems more cohesive where the original can sometimes become unbalanced in proportion to other frequencies. Again, the original was always pleasing to my ears, and I had zero complaints about it compared to the competition available in its price range at the time it launched. But on direct comparison using a highly resolving system the benefits of the new revision become clear. 
     
     

     
    Earlier I mentioned Alison Krauss - let's go back to her for a moment. I ripped the stereo DSD layer of her New Favorite SACD release and stored on my NAS, and did the same with her slightly more pop-oriented Forget About It. I also ripped the redbook layers of both albums, so I'm able to compare each version directly. To the best of my knowledge, each album uses the same master for the DSD and PCM versions. Any difference would chiefly be caused by the conversion from DSD to 16/44.1 PCM for the CD version, along with any small variations the B.M.C. and Yulong gear might have when handling these different formats. But for the most part we should be hearing what is essentially studio master quality, and comparing it to a really well done CD. 
     
    In this highly resolving system, the differences were clear to me. Not a night-and-day, jaw-dropping, immediate distinction - remember the CD layers do sound very pleasing on their own - but clear enough to where I think most people would notice after going back and forth for a while. The DSD versions are richer, with more detail, and a more "liquid" sound overall. This comes through clearly in Alison's vocals but also in the Dobro and guitar and other instruments, perhaps to a lesser degree. I do think it takes a top notch system to bring it out though, and I recognize the fact that excellent recording/mastering is far more important than format. I'd take a redbook release of this caliber any day over many hi-res albums in my library. Still, with all things being generally equal, I do think there are gains to be had from going beyond 16/44.1, and the DA8 II is good enough to let those improvements shine through.
     
    As a reminder, Yulong uses a combination of tuning by ear and rigorous measurements. Listeners can take comfort in knowing the DA8 II performs exceptionally well in both regards - the scope likes it as much as my ears do. This remains an area where Yulong is far ahead of many Chinese contemporaries, and even many competitors based in the USA. Plenty of designers either can't or won't provide measurements of their gear, so it's always nice to see it done. Have a look for yourself:
     
     
     
     
     

     
    Conclusion
    Ultimately, as I said before, the mkII version of Yulong's DA8 is an evolution, not a revolution. The original being so well done and feature-laden makes substantial improvements a difficult task. Keep in mind, the device retains its same price of $1299, which I think is quite competitive considering what's on offer. Having rotated the DA8 II through various systems including entry-level, modestly nice, and full-blown high-end, I'm impressed with the results. It meets the listener where they are and offers room for growth as they move up the ladder. Which is exactly what I like to see in a device like this.
     
    I do think it's nice that Yulong is not resting on prior accomplishments. Digital gear is a rapidly growing market segment and a lot has happened in the past 2 years since the original DA8 launched. Designers can't afford to sit still even if their gear is already quite good. This improved version has everything it takes to stay very competitive, and I heartily recommend it. 
     
    GioF71 likes this.

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