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DAC 2496 (AK4393) DAC KIT With CS8416+AK4393+5532
DAC 2496 (AK4393) DAC KIT With CS8416+AK4393+5532
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Old 2nd April 2018, 09:51 PM   #2931
Peterma is offline Peterma  Australia
diyAudio Member
Join Date: Jan 2009
Location: From London to Sydney Feb 69
Mine is without op amp and it sounds great to my ears the best in my system. its a really a personal choice on SQ, it sounds as good as my AYAII TDA1541.
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Old 4th June 2018, 03:01 PM   #2932
gabdx is offline gabdx  Canada
diyAudio Member
Join Date: Jan 2008
I am converting the output to Broskie tubes (differential+Unbalancer). I am currently using a discrete symmetrical transistor design with high feedback and regulators.
I did previously a 'lampizator' type of output for other I out dacs and it is horrible, I disassembled it after 1 minute of listening. Then I designed my own one stage cathode follower i/v or Voltage buffer and it was better for pcm56k (not worth it) and I concluded this is a very bad dac.
I started with 6n2pev (12Ax7 equivalent kind of) and sound was better but lacked details and too flat.
I did a previous tube conversion for AK4396 with one end of the signal directly to a 6n6p cathode follower and parallel cathode follower 6n6p, sound was too dark and mellow.
Right now I am using the discrete high feedback transistors, it sound 100x times better than the stock opamps but it is not the best for sound separation and space around instruments. Everything is more homogenous and bass especially is too clean with the feedback design, everything lacks texture, too polite sound.
In conclusion the discrete design is way better than only a single cathode follower. I bet that the 6sn7 would give a 10times better sound that the 6n2p or 6n6p Russian tubes which sound very bad in anode sound even bad in cathode follower which is unusual.
sorry for the introduction, now I have the choice of valves:
6DJ8(ecc88) Siemens
6SL7 tung sol or russian
EF184(6EJ7) from russia or from Realistic (gold pins)
5751 GE
12au7(ecc82) Silvertone.
I can use a 6sn7 for the second tube, a NOS from tung sol red base, haltron, FAA, RCA, Electronic tube.
edit: this is my 'over stock' tubes which I don't really have a use for now, I don't want to use ecc99 or other similar tubes or big triodes/pentodes which I keep for power amplifiers because I have a limited stock and paid premium for them.

Last edited by gabdx; 4th June 2018 at 03:05 PM.
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Old 5th June 2018, 04:55 PM   #2933
carlmart is online now carlmart  Brazil
diyAudio Member
Join Date: Mar 2001
Location: Brazil
Tried any chips like the ths4032?

This ia very highly regarded chip, and not many have tried it.
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