Gustard U12 USB Interface 8 Core XMOS chip
Dec 28, 2015 at 9:24 PM Post #3,106 of 3,700
The PUC’n Breeze... (so far)

So I got a used Breeze (with Talema) at a good price from a forum member and the fight has been on for main system superiority head to head against my PUC 2 Lite USB to AES converter. Plan was loser sits permanently on the musical sidelines in the headphone system in the office. (It’s actually a comfortable office, so don’t worry about the losing converter’s welfare). I first wanna say rb has some Ceriously golden (graphene?) ears! (Audio-speak translation: based on everything of his I’ve read, his sonic sensibilities seem to align wholeheartedly with mine:)

The Breeze is the first converter in my system to last more than about two tracks (of any genre) against the mighty PUC. No sir, the Breeze aint PUCin’ around! Now there are some caveats: because Breeze was bought lightly used, not sure how many miles she has on the odometer and rb says it takes some time to break in. Also, I do not have in house the esteemed/officially rb-approved Cerious Graphene power cord. And here is where you should start listening to rb; the man is exactly right on when he says the Breeze is power cord sensitive. It is! Started with the stock cord and it was a terrific machine, but with just a touch of edge (break in too?) and slightly less depth etc. Switched a few cables I had in house and presto! Arrived at the JPS Labs The Digital 2m AC cable and it was a match made in heaven. I’m betting, based on rb’s amazement, that the Cerious would scale even loftier sonic heights, but alas, I’ve spent too much on all these stoopid doo-dads and converters to try that one right now.
In any case, with the JPS Labs power cord and Mogami gold XLR digital cable in place, I was ready to roll. (I initially slightly prefered the Breeze's AES output to it's RCA and my DAC can take AES or RCA coax, but later when I switched in a ‘better’ SPDIF cable, things evened out a bit more between these outputs). Now I’m not going to do one of those every single damn track I heard 'blow by blow' reviews, as I myself find them very tedious to read (and write:). Basically, in my view, a component has a certain sound relative to your 'reference' component (who knows which is really “right”?) and it doesn’t matter how many tracks or genres you run through; this sonic signature stays pretty constant and the thing either makes music for you or it doesn't. If you are attracted to someone, do you ask them to stand like this and then like this and then... no! You are just attracted to them or not:) Later you will discover they too are flawed and only human, but I digress...
So I picked a few albums I liked and which are really well recorded and there you have it. I used Eddie Higgins Trio ‘Ballad Higgins,’ (some amazing bass on some of these tracks of mellow jazz; stream it on Tidal!), The Wanderer Trio ‘Beethoven Trios’ (what can I say, I like trios?) and lots of really good concert pianists like the guy who won the 17th International Chopin competition and Yundi Li playing the same piece back to back (the No. 17 Chopin prelude, for example. FYI, I preferred Yundi Li’s playingJ
(Drum roll…….) In very general terms—it’s now a close horse race! Finally. The verdict? Both are really really (really) good converters! Thank you to RB for discovering this little guy! Both share a wonderful way with imaging/stage width and depth, dynamics and tone, and most importantly musical engagement. Also—a first for a Chinese-made converter for me, there have been zero dropouts or issues with the Breeze and in that sense it is ‘PUC-like’ in it’s reliability. With Tidal, HD Classics or Audirvana Plus, this thing just ‘works’!! (And let the record so reflect the newest Audirvana plus sounds awesome!!) So on points, and this is with an unknown amount of break in and without the Cerious Graphene power cord, if the PUC is at 100, the Breeze is between 92 and 96. Why? For me it comes down to BS and TP (thought you’d enjoy thatJ Namely, Bass, Space and Tonal Purity. In my system thusly wired, the PUC 2 Lite has just a smidgeon more bass, a tiny bit more air and space and a certain tonal purity; very slightly ‘purer’ than the Breeze. A good 6moons-type phrase would be something like ‘with a well-recorded piano, the breeze is slightly more string than mallet and the PUC is slightly more felted mallet on string.’ There. And you didn’t have to read 20 pages of circuit diagrams and interviews with the designer’s elementary school teacher and golf caddy to get to that statement:wink: I kid! I kid!! (rimshot please). Both converters suffer no lack of impact and image size but maybe the PUC 2 is very slightly ‘meatier’ or ‘weightier’ sounding than the Breeze; slightly ‘bigger’ sounding? So thus far I would say if your DAC does not have an AES input, definitely just go for the Breeze and be done with it, but cable it appropriately! And if you do have AES input capability, I might go for the PUC 2 Lite.
However—I have not heard the Breeze with the Cerious power cord of rb’s affections and affectations. I will say I know rb uses a power strip with filtering for his digital gear and I am guessing that this is the reason I liked the JPS Labs The Digital AC cord so much with it (which is not good with amps in my experience!); because it contains some kind of AC filtration per the design brief. This seems to be just what the Breeze needs. But I am very curious to try the CeriousJ
Essentially, and this is sans-Graphene and again with who knows how much break in on the Breeze, I could listen to either of these converters forever (read: at least 3 months in audio terms); music sounds so real with them in the system and so present and the stand-up bass on something like the ‘Ballad Higgins’ disc is frightening with either converter (especially with the SVS SB 1000 subwoofer I bought to try!). Imaging is similarly spooky. Really, if I suddenly lost one or the other of these converters, I could happily live with either, though with the Breeze, I’d probably be unable to stop asking myself how much better it might could get if I ordered the Cerious power cord (thanks rb:frowning2: Bottom-line, yes I feel the PUC 2 beats the Breeze in several areas but only just, and then only if you have AES input on your DAC. Otherwise you may need a 110ohm to 75ohm converter between them and who knows what that might do to the PUC’s small musical advantage? Also, the PUC does require USB power and the Breeze does not. That means either you run a standard USB cable with it or, in the case of a split cable, employ a linear power supply like my Teradak. So an added expense if you need a linear power supply. On the other hand, the PUC is totally power cord insensitive cause it doesn't have one:)
I thought about not writing this pseudo-review yet because again (for probably the 3rd timeJ, I am not certain of amount of break in time on Breeze (it definitely isn’t right out of box) and also don’t have the ‘ideal’ power cord, so please take this brief sketch as saying simply that the Breeze is a superb converter with which, if I lost the PUC 2, I could happily live and not notice any Cerious(!) loss of musical involvement.
Also, on a related and interesting note, I want to add that I bought the Lite speed 2G cable based on rb’s writings/recs and damn! This thing is one hell of a USB cable! Initially, it seemed there was a slight break in time (maybe 10 or 15 hours?) where maybe some image center-fill was lacking, but since it settled down, no such issue exists and it has just been so involving; pacey with a huge soundstage, wonderful tone and depth—just wow. It was neck and neck initially with my reference USB cable (Chord Silver Plus) and that cable is similarly engaging, pacey and musical. However I think the Lite Speed just slightly beats it on tonality (a bit more refined without being laid back) and bass (a bit deeper) as well as stage depth. The Chord may be slightly pacier and it speaks with a slightly more forward accent up top. A terrific cable, but I am starting to prefer the Lite Speed 2G. Again, much like the converters they’re attached to, I could happily live with either, but head to head (both with AQ Jitterbug attached), I keep coming back to the 2G now as the slightly more ‘natural’ and broader sounding cable. Whew! That was a close one for the PUC 2 Lite! She almost ended up in the office system. Too bad I cant really put her there even if she lost because that DAC has only RCA coax inputJ I didn’t tell the PUC that before the contest so as not to scare the poor thing… Now someone get me a Cerious! I’m Cerious! J
 
Dec 29, 2015 at 11:12 AM Post #3,107 of 3,700
Great review!  Bravo!! and LMAO funny.  Love the humor.  You have my interest in the PUC2 Lite renewed!
 
I will have to try one of these as some point - maybe a well priced used one will show up on the market.
 
I completely agree - like the ladies - a component either does if for you or it doesn't.  Although, once the bikini goes on and the clothes come off - it can give a better (hopefully) or worse view of things.
 
For me there are some tracks that are bikini-ish.  Hard to hide the flaws.
 
Now for me the Cerious Graphene on the Breeze was a game changer.  I had a few other cables that worked  -  but not like the Graphene Extreme.  It also helped on my APL NWOjr DAC - but nearly to the degree it did on the Breeze.
 
So now on to the DIYinHK DXIO PRO3a - should be here soon. 
 
Then another Breeze for experimentation purposes. - first replace the SPDIF RCA output.  Upgrade the gold plated brass CRC with an Eichman digital exact 75ohm pure tellurium-copper one.   That's a no brainer and had great effect when I swapped the one on my DAC60 mod project.  Then the clock upgrade mod - to Crystek CCHD-957's.  Caps after.  So much to explore for 2016!
 
Happy New Year!
beerchug.gif
 
 
Dec 29, 2015 at 7:09 PM Post #3,108 of 3,700
so that means you have the heat gun for the component change job ? 
 
in face there is so much to try out with the breeze even a furutech socket might help too. I have also wonder if the jumper cable to RCA spdif needs to be 75ohm too ?
 
your episode on the ultimate breeze vs PRO3a will be an interesting journey. 
 
Dec 29, 2015 at 7:39 PM Post #3,109 of 3,700
  so that means you have the heat gun for the component change job ? 
 
in face there is so much to try out with the breeze even a furutech socket might help too. I have also wonder if the jumper cable to RCA spdif needs to be 75ohm too ?
 
your episode on the ultimate breeze vs PRO3a will be an interesting journey. 


Not yet - still shopping for that. 
 
Yes wondering about a furutech socket as well.  Will likely swap out the stock wire for Mundorf solid silver/teflon - like on my DAC60 project. I had excellent results there (and the reason for the leftover Eichman).  That's a very easy wire swap. 
 
I hope the PRO3a gets here soon.  Maybe can arange  a swap with @onlythat for his PUC2 Lite - to complete the DDC rolling experiment.  And well maybe the new Audio-gd as well.
 
Dec 29, 2015 at 11:22 PM Post #3,110 of 3,700
Done! Going to visit the parents in Boca for a week. So perhaps I will pull a Spike Lee and Do the Right Thing-- which would of course be to let you have the PUC while I'm gone:)

Just do me a favor- treat her right! Buy her flowers while she's there; a nice Italian dinner etc.

FYI- forgot to mention my Breeze was retrofitted by its former owner with a BNC connector and I used a BNC cable from Breeze to DAC when not using the Mogami AES cable.

And thanks for the kind words about the review! Let's hope it's helpful for some who may be on the fence in deciding between these two superb competitors.

On a final note, we are all very concerned with what DAC we have, but perhaps we should focus equal energy on what converter we're using to feed that DAC. Certainly I've discovered this is hugely important as regards my own level of musical enjoyment, and the right choice can make a good system a great system, or relegate a potentially great one to the realm of the merely good.
 
Dec 30, 2015 at 5:39 AM Post #3,111 of 3,700
U12 HDMI LVDS I2S/DSD output pin assignment
 
Look at these two pictures.  You see DSD R and DSD L are reversed!!!
Gustard says there has been no pin assignment change, which is very likely to mean the previous version was incorrect.
This explains DSD channel swap I experienced based on the "previous" version.
 
The PS Audio suggestion indicates DATA and DSD R together, as well as LRCK and DSD L, as in the "previous" version.
(+/- swap for No.1/3 and 7/9 is a different issue.)
Since the "current" version is correct, you need two different wirings for PCM and DSD, respectively, to connect to the equipment based on the PS Audio suggestion.
 
L.K.S. MH-DA003 seems to be based on this "current" version of Gustard.
 
DAC-X12 and DAC-X20(U) work correctly both for PCM and DSD with U12.
There was also the "previous" version for X12 corresponding to the one for U12.
 
< previous (as I got my first unit around February 2015) >


< current (from Taobao) >

 
 
Dec 30, 2015 at 9:59 AM Post #3,113 of 3,700
Done! Going to visit the parents in Boca for a week. So perhaps I will pull a Spike Lee and Do the Right Thing-- which would of course be to let you have the PUC while I'm gone:)

Just do me a favor- treat her right! Buy her flowers while she's there; a nice Italian dinner etc.

FYI- forgot to mention my Breeze was retrofitted by its former owner with a BNC connector and I used a BNC cable from Breeze to DAC when not using the Mogami AES cable.

And thanks for the kind words about the review! Let's hope it's helpful for some who may be on the fence in deciding between these two superb competitors.

On a final note, we are all very concerned with what DAC we have, but perhaps we should focus equal energy on what converter we're using to feed that DAC. Certainly I've discovered this is hugely important as regards my own level of musical enjoyment, and the right choice can make a good system a great system, or relegate a potentially great one to the realm of the merely good.


Oh no!  You bought that Breeze!  I would give an untampered one a try.  That modification looked very suspect to me.  If you insist on BNC just use a AES to BNC adapter.
 
Looking forward to giving the PUC2 a try.  Once my burnin and trail on the DXIO Pro 3a is complete it's on it's way to you.  Sorry bro - I just can't live without these Ceriously great Graphene power cables.  I'm trying to decide if I should buy my fourth - the last one for my office DAC.
 
Cheers!
 
Dec 30, 2015 at 10:02 AM Post #3,114 of 3,700
  U12 HDMI LVDS I2S/DSD output pin assignment
 
Look at these two pictures.  You see DSD R and DSD L are reversed!!!
Gustard says there has been no pin assignment change, which is very likely to mean the previous version was incorrect.
This explains DSD channel swap I experienced based on the "previous" version.
 
The PS Audio suggestion indicates DATA and DSD R together, as well as LRCK and DSD L, as in the "previous" version.
(+/- swap for No.1/3 and 7/9 is a different issue.)
Since the "current" version is correct, you need two different wirings for PCM and DSD, respectively, to connect to the equipment based on the PS Audio suggestion.
 
L.K.S. MH-DA003 seems to be based on this "current" version of Gustard.
 
DAC-X12 and DAC-X20(U) work correctly both for PCM and DSD with U12.
There was also the "previous" version for X12 corresponding to the one for U12.
 
< previous (as I got my first unit around February 2015) >


< current (from Taobao) >

 

Thanks for posting this great info - i2s continues to be a mess of alternative wirings, HDMI vs RJ45, etc...  Someone could create a cottage industry just making various correctly wired cables.
 
  I sold my U12 couple minutes ago. And, I must confess my new love is the curvy Amanero.

Any pics or links for the new Amanero?  New chip design?
 
Dec 30, 2015 at 10:37 AM Post #3,115 of 3,700
 
Any pics or links for the new Amanero?  New chip design?

 
 
I ordered both of these TCXO have no LDO, and the PCB I got in hand is yellow in colour. I pair this USB Interface with TaraDak Linear PS, and its playback out performance  MX-U8 V1.5 by several aspects.

 
I've learnt the third oscillator in fact lays an important role on the USB Interface, thus  I'm considering to replace the third oscillator with an OCXO
 
Dec 30, 2015 at 11:02 AM Post #3,116 of 3,700
   
 
I ordered both of these TCXO have no LDO, and the PCB I got in hand is yellow in colour. I pair this USB Interface with TaraDak Linear PS, and its playback out performance  MX-U8 V1.5 by several aspects.

 
I've learnt the third oscillator in fact lays an important role on the USB Interface, thus  I'm considering to replace the third oscillator with an OCXO


Nice!  The third clock is for USB timing only and not nearly as critical as the Audio clocks - at least according to Uptone's John Swenson.  Likely going the route of a OCXO is way over kill.  Maybe better to use a couple of OCXO for the audio clocks - but then you'll need some sophisticated frequency dividers and lot's of power.
 
Dec 30, 2015 at 11:39 AM Post #3,117 of 3,700
 
Nice!  The third clock is for USB timing only and not nearly as critical as the Audio clocks - at least according to Uptone's John Swenson.  Likely going the route of a OCXO is way over kill.  Maybe better to use a couple of OCXO for the audio clocks - but then you'll need some sophisticated frequency dividers and lot's of power.

 
Thank you for your valuable advise.
 
Friend of mind has modified the third clock recently. And, I've learnt diyinhk is also taking a great care for the third clock on their products. It sounds like a fashion, doesn't it?

 
The enclosure isn't big enough to put on additional R-Core and regulator, so I power the Amanero externally.(i.e. via both 5V jack and usb.)

 
Regards,
 
 
Riemann
 
Dec 30, 2015 at 12:39 PM Post #3,118 of 3,700
 
Oh no!  You bought that Breeze!  I would give an untampered one a try.  That modification looked very suspect to me... 

LOL
so if anyone else replaces a termination its ok but my job is suspect? LOL
if the dac 60 spdif is indeed 75 ohm, a true 75 ohm from source to cable to destination termination of same (bnc) will be true 75ohm. i'm just not buying ($$$) expensive rca terminations claiming to be true 75 ohm when i can just use the industry standard of bnc, from source to cable to destination...
and as for i2s, you see that adopters of the ps audio layout are a constant, while my own experience with the gustard corroborates the 'mix up' some overseas companies have with consistency regarding even their own formula. 
 
Dec 30, 2015 at 6:24 PM Post #3,119 of 3,700
  LOL
so if anyone else replaces a termination its ok but my job is suspect? LOL
if the dac 60 spdif is indeed 75 ohm, a true 75 ohm from source to cable to destination termination of same (bnc) will be true 75ohm. i'm just not buying ($$$) expensive rca terminations claiming to be true 75 ohm when i can just use the industry standard of bnc, from source to cable to destination...
and as for i2s, you see that adopters of the ps audio layout are a constant, while my own experience with the gustard corroborates the 'mix up' some overseas companies have with consistency regarding even their own formula. 


That was tongue in cheek!  I knew it would get your goat - sorry man.  A little New Years razz.
 
Nothing wrong with that BNC replacement - LOL 
beyersmile.png
  That Breeze is a mighty fine specimen...
 
I'm so bad
evil_smiley.gif
 
 
PS I knew it was yours the moment BNC was mentioned...I know from the DAC60 mod thread you do good work
 
Dec 30, 2015 at 6:34 PM Post #3,120 of 3,700
   
Thank you for your valuable advise.
 
Friend of mind has modified the third clock recently. And, I've learnt diyinhk is also taking a great care for the third clock on their products. It sounds like a fashion, doesn't it?

 
The enclosure isn't big enough to put on additional R-Core and regulator, so I power the Amanero externally.(i.e. via both 5V jack and usb.)

 
Regards,
 
 
Riemann

Well I'll repost this from one of preious posts regarding the Nuetron Star clocks - from chief engineer at Uptone Audio - John Swenson.  His comments on the importance of the USB clock.  But it is good to see that DIYinHK built onto their board a NDK SD for USB - it was probably cheaper then buying a different XO clock to put there - and they are tiny so it saved space.
 
I added the bold emphasis:
Quote:
Originally Posted by JohnSwenson
Something very strange happened, I actually have a few minutes free so I can talk about this.

First off on REGEN clock jitter in general. The whole purpose of the REGEN is to improve the signal integrity so the USB PHY in the DAC generates less noise. Jitteris a PART of the signal integrity, but as far as I know not a very large part. Meaning going into ultra low jitter territory should not make much of a difference. I have designed a few USB PHYs and none of those would have much of any noise difference when the incoming jitter goes from really good to really really good. But that doesn't mean all PHYs behave the same way.

Note that the clock in the REGEN is not the same as the clock in the DAC that feeds the DAC chip(s). THAT clock is very important. The REGEN clock is not even the clock that is in charge of the timing of the I2S signals to the DAC chip, that is part of the DAC again. It is not even in charge of the USB processing in the DAC's USBreceiver, that is controlled by the clock connected the USB chip in the DAC. About the only thing it can possibly affect is the PG noise from the PHY.

The Neutron Star looks like a well implemented external clock but I have not seen a phase noise plot for it so it is hard to tell how good it really is. If anyone has actually seen a phase noise plot I would like to see it.

The connection of the Neutron Star to the REGEN shown earlier in this thread shows an unterminated connection. The coax is just connected across the original clock pads. This is not necessarily the best way to connect a clock. The BEST way is to have a termination resistor at the destination side that matches the impedance of the cable, which I presume is 50 ohms. But in order for that to work the output impedance of the clock also needs to be 50 ohm. I did not see anything in the documentation which specifies the output impedance. There is an output transformer but no information on its characteristics or the circuit driving it. So given the unterminated connection and non-specified output impedance, there are likely to be reflections at the connection to the board. Given the fairly short length of the cable they may not have any impact on the hub chip, but who knows, I certainly have not done any analysis on the SI sensitivity of the hub chip clock input.

All my previous experimentation with DAC clocks has shown that the external clock REALLY has to be much better than the on board one it is replacing to make any significant difference, the connection from board to board almost always adds enough signal degradation to partially counteract the "goodness" of the external clock.

Because of all of the above I was surprised by the amount of improvement heard with the Neutron Star. I would have assumed some small improvement, but not doubling the improvement of the REGEN. The only thing I can think of is that if this was a system that was already highly optimized, so the SI was already very good, the SI improvement of the off the shelf REGEN would not be all that large, so maybe in that case lower jitter may have larger percentage of the total improvement.

I want to emphasize that I am NOT recommending that everybody go out and spend $600 upgrading the clock. There is not nearly enough information to know how effective this is going to be on most systems. If you REALLY want to spend the money trying this you are of course free to do so, (it does void the warrantee), but be prepared that it may not double the improvement in YOUR system.

John S.

 
I love that separate ps for the clock - like Alex does.
 

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