TDA 1541 vs. 1543 - Vuki - Tweakers' Asylum

TDA 1541 vs. 1543

Hi,

I have two DACs with TDA IC's, both without dig. filter and using CS 8412 as DIR. Few days ago there was listening session where some comparations between those two were made. Here are the results: 1541 DAC has better resolution but 1543 was also good. 1541 is smooth and warm with beautifull timbre. In comparation, 1543 is a bit agressive and grainy, but still better than commercial DAC with double BB1716 (balanced) with discrete analog stage and upsampling unit (with CS8420).

My 1541 DAC is also much more expensive to made than 1543. It uses shunt regulated stabilizers for every PS pin (with pre-regulation and heavy filtration), Siemens Sikorel and Sanyo OsCon elecrolytic caps, Wima film & foil caps on 1541, Mundorf Supreme coupling caps and holco resistors. IV is passive with 82R holco resistor. Analog stage is simple current sourced anode amplifier made with one Sovtek 6922 tube. Innitially I had hexfet source follower after tube but it sounds better (cleaner) without it. I also found that decreasing IV resistor value "kills" dynamics, what goes against advices I read from others (or is this true just for BB PCM63?), so I'm going to try even higher values. I'm also intending to try transformer (perhaps Lundahl) for DAC-tube coupling. Anyway, as it is, this DAC is far better then commercial units I listened to.

But, for those on a budget 1543 is wonderfull solution- cheap and no need for extra analog stage. My design is based on a Kusunoki DAC but with a few modifications. First and most important is that this DAC sound much better with 3 1543's instead of 4 when the bias resistor is changed to 432R and load resistors to 470-560R. This change even has influence on THD. With original (330 & 680R) resistor arrangment and 4 IC's DAC has THD of ca. 0.2% and new DAC has ca. 0.05%. Perhaps it is interesting that 0.05% THD comprising of 2. 3. and 5. harmonics sounds better then same value THD comprising of just 2. and 5. harmonic.
However... TDA 1543 is also very good and perhaps excellent solution for bellow high-end systems.

Best regards,
Vuki

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Follow Ups Full Thread

Topic - The Sound of AD1851 vs. TDA1541. primarily findings - Elso Kwak 16:24:40 04/20/01 (14)

Re: The Sound of AD1851 vs. TDA1541. primarily findings - Daniel Espley 04:58:33 04/21/01 (1)

Re: The Sound of AD1851 vs. TDA1541. primarily findings - Elso Kwak 17:05:42 04/21/01 (0)

Re: The Sound of AD1851 vs. TDA1541. primarily findings - Ric Schultz 00:51:07 04/21/01 (10)

Re: The Sound of AD1851 vs. TDA1541. primarily findings - Elos Kwak 05:03:16 04/21/01 (9)

The Sound of AD1865 - -Steve 12:08:35 04/23/01 (0)

Re: The Sound of AD1851 vs. TDA1541. primarily findings - Ric Schultz 06:27:54 04/21/01 (7)

Re: The Sound of AD1851 vs. TDA1541. Silicon chromium resistors and other things - Elso Kwak 04:51:09 04/22/01 (6)

Re: The Sound of AD1851 vs. TDA1541. Silicon chromium resistors and other things - Ric Schultz 17:10:44 04/22/01 (0)

TDA 1541 vs. 1543 - Vuki 04/22/0116:56:32 04/22/01 (4)

Re: TDA 1541 vs. 1543 - Ric Schultz 17:22:44 04/22/01 (3)

Re: TDA 1541 vs. 1543 - Daniel Espley 07:48:00 04/23/01 (2)

Re: TDA 1541 vs. 1543 - Vuki 13:40:04 04/23/01 (1)

Thanks Vuki, let me know how you get on. nt - Daniel Espley 09:28:51 04/24/01 (0)

Re: The Sound of AD1851 vs. TDA1541. primarily findings - Mack 17:23:25 04/20/01 (0)

Follow Ups

TDA 1541 vs. 1543 - Vuki 04/22/0116:56:32 04/22/01 (4)

Re: TDA 1541 vs. 1543 - Ric Schultz 17:22:44 04/22/01 (3)

Re: TDA 1541 vs. 1543 - Daniel Espley 07:48:00 04/23/01 (2)

Re: TDA 1541 vs. 1543 - Vuki 13:40:04 04/23/01 (1)

Thanks Vuki, let me know how you get on. nt - Daniel Espley 09:28:51 04/24/01 (0)

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