xDuoo TA-01 DAC/Ampsearch

xDuoo TA-01 DAC/Amp

xDuoo TA-01 DAC/Amp

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Is it okay to plug the rca line out into another amplifier, will this bypass the amp at line level
Has anyone asked xDuoo if a 12ax7 tube can be used with this amp and if there are any hazards, expected sound problems? I've found a Genalex Gold Lion 12ax7 locally at a good price but I'm still not sure if I should take the risks. I've read that "upgrading" a 12au7 (mid gain) circuit to a 12ax7 tube (high gain) can cause circuit overdrive and god knows what else can happen.

Please advise if you have such experience. Thank you!
My TA-01 made it to Europe the other day and I already modded it with a Socket Saver Tester + Black Tube Guard. It took some unexpected drilling of larger holes for the tube guard bolts but the result is eye candy.

I'm still waiting on my new headphones to arrive but this thing sounds fabulously warm and tight even with a JJ Electronic standard 12au7 tube. I got rid of the Chinese stock tube on my 2nd listen. Let's see how it sounds after burn-in on my forthcoming Beyerdynamic DT 880 250 ohm.

PS: it was 100% plug'n'play with Windows 10, zero drivers required. They didn't work anyway.
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yes, I'm using a "12au7 socket saver tester" from ebay - https://www.ebay.co.uk/itm/1PC-Bakelite-9Pin-Tube-Socket-Tester-Saver-for-12AX7-12AU7-6DJ8-EL84-Gold-Plate/191783356390?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2057872.m2749.l2649

And the tube guard also from ebay - https://www.ebay.co.uk/itm/1-x-Black-tube-guard-protector-for-12AU7-12AX7-ECC83-solid-aluminum/272578054447?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2057872.m2749.l2649

IMPORTANT: You will need to unscrew the top "grey plate" from the original panel. There are 4 tiny screws and mine were covered in red silicone which slowed me down unscrewing them but it is doable. After you unscrew the top grey plate you will have 4 empty holes and 3 of them are exactly matching the design of the Tube Guard, so you don't need to drill new holes on the top panel. The next problem is that the holes are not wide enough to directly screw the tube guard on, so I had to widen the holes just a tiny bit to accommodate the screws for the Tube Guard. To widen the holes you can use a drill or do it manually by hand using a 2.5 hexagonal screwdriver to get in (BE CAREFUL) and then get a 3.0 hexagonal screwdriver to just slightly widen the hole. I did it with the hexagonal screwdrivers but be careful. Everything took me about 1 hour to complete.
Timewalker
Hi

See my review and unlock 32-bit. ;-)

Just do the folders 1,2,3 etc. Let me know how it goes?
Hi All

I realize my folder was incomplete, https://drive.google.com/open?id=1dAPrE9w1vGjcApPwF0p6S_p5l863WJmc it now has instructions the usb driver, xmos update, firmware update and some foobar stuff. I also suggest getting a socket saver. https://www.ebay.com/itm/9Pin-Bakelite-Vacuum-Tube-Socket-Saver-base-For-12AX7-12AU7-ECC82-ECC83-amps-P/113011138261?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2060353.m2749.l2649
Install driver and update firmware then enjoy a 32-bit rev.B TA-01.
https://drive.google.com/open?id=1dAPrE9w1vGjcApPwF0p6S_p5l863WJmc
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Nevermind. I was able to extract it and found the instructions. Very helpful!
rlvargas0
Hi yea unzip it and install he xmos driver then follow the document xduoo sent me and apply the firmware. This was annoying me for a long time and I must have sent them about 5 email support requests, They might have worked on it after I emailed them as this updated version (non wolfson) needed the updated firmware.
A quick comment about the TA-01. I purchased one a some time ago and subsequently posted some pics, in this forum, which show the pair of CS-4398 chips inside. I sold that unit and quickly regretted it. So, I've since re-purchased an identical unit.
My primary headphones often get heavy after long sessions so I like to wear the K7XX for casual listening of news-clips, youtube, etc. I keep the very light K7XX's plugged into the TA-01 for an outstanding setup I can wear and enjoy for hours. I plan on keeping the TA-01 to compare against other dac/amp combos I buy & sell.
My overall impression from the TA-01 is indistinguishable, to my tinny ears, from the Fiio E17K/K5 combo and even the Fiio X5iii/K5 combo.
The presence & punch of my Mojo/CTH combo is in a different league than the TA-01 but so is the cost.
The TA-01 is easily worth the $119 you can get it for in this drop or elsewhere.
Need the actual driver.
What is the last price of this Amp/dac ?
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https://www.massdrop.com/buy/xduoo-ta-01-dac-amp/talk/1996294
The HE-4XX are practically Identical other than looks, So it should work just fine.
Ilikedifferentthings
I am going to get the magni3 and modi2 as schiit stack to run my beloved 4xx
Hi everyone, since I'm new to the tube world with this entry level DAC/Amp I've done a LOT of reading in the last 5 days and came across a very interesting article about tube fakes. I now understand, how "profit-oriented" this tube market can be. Imagine factory workers from ex-soviet countries selling low-quality/defective 5000 Tesla tubes, yes 5k (which had to be destroyed) to fakers, who then re-branded them as Telefunken ECC803s (the holy grail and sold them for $$$). Both workers and fakers make a profit, the buyer is paying a lot of money for his "belief" in someone's credibility.

I'm coming to the conclusion that a lot of people have paid 3-digit $ for something that is not really "original". So my advice is: if you see a Telefunken ECC82 or 802s on sites like Amazon and Ebay, it is not there out of a sudden, and don't rush a purchase. I'm based in Bulgaria, where old stock of Teslas is still found in someone's closet or old warehouse, prices are still upward of $30 (and I'm not sure if these were not mid 1990s JJ-built stock with Tesla parts, after Tesla factory equipment was sold to JJ or EAT). As a reference modern day EAT ECC803S Cool Valve Diamond is priced at € 180.00 a piece http://www.europeanaudioteam.com/en/eat-ecc803s-cool-valve-000009.html . I tend to believe that modern-day tube valve production process must have gone a step forward.

Here is the article that I read and was amazed of how the NOS market works - http://www.jacmusic.com/nos/images/Fakes/index.htm

In the end I might settle for a newly built JJ ECC802s gold, so that I know I'm not screwed and this is an honest copy of the Tesla / Telefunken design, built with contemporary equipment. What do you think about all this?
Timewalker
Electro Harmonix Gold are impressive. I dare to say I prefer it over the Genalex.
JJ tube is a little crisper than stock but the Gold Lion tube is pretty darn sweet, getting some serious low end off this thing.

EDIT: Many months on I have many tubes, the JJ was faulty so returned it and the Gold Lion as it wasn't sounding right. I did get a gold pin Electro Harmonix and it is pretty good.

I now also have a few NOS tubes:

Mazda(cifte): Best imaging, almost holographic with a warm low end.
Sylvania: Best low end, dark sounding but good with EDM.
Mullard: Best mid range, if you want crisp and lush this is it.
RCA: Good all rounder, a satisfying tube indeed.
Westinghouse: lot's of clarity but not harsh a pleasant tube.
Anybody else have the volume level just drop and decreased power across the board. Same thing with two tubes.
EDIT: was a software issue set to do nothing. https://i.imgur.com/sIe78gB.png
Hello everyone. I finished my review and measurements of TA-01. It is posted here: https://www.audiosciencereview.com/forum/index.php?threads/review-and-measurements-of-xduoo-ta-01-and-schiit-fulla-v2-dac-and-headphone-amp.3105/

Let me know if you have questions or need something else measured before I send it back to its owner.
Why it uses the Cirrus Logic, direct from xDuoo rep.

"Because the WM8740 cann't be decode DSD signal, So, we change to Cirrus Logic's DAC in new version, so, the TA-01 can support DSD128 now"
rslatara
Yes I've compared both chips on the Cirrus Logic's website (you can find both Wolfson and Cirrus model there) and DSD was the difference. I believe they've made the right choice. Plus Cirrus chip is released 2015, while the Wolfson is a 2010 model. I have a Wolfson on my Pioneer CDJ900
Timewalker
I just put a Gold Lion in and it sounds very sweet indeed.