NAD T535 DVD player schematic

[mudihan]

Does anyone have it? I like the stock sound, but improvement is always possible. Thanks!

[SoNic_real_one]

I don't have the schematic for the exact model but their DAC's are usually multi-channel, voltage-output. So nothing fancy there, no I/V conversion... I saw CS4360 or PCM1601. From what I saw they loove to use as filters NJM4580... Which is not a bad OpAmp, but you can find better duals. Don't know how much would matter with the existing multichannel DAC's.
You can open it and see what's inside.

[mudihan]

Originally Posted by SoNic_real_one

I don't have the schematic for the exact model but their DAC's are usually multi-channel, voltage-output. So nothing fancy there, no I/V conversion... I saw CS4360 or PCM1601. From what I saw they loove to use as filters NJM4580... Which is not a bad OpAmp, but you can find better duals. Don't know how much would matter with the existing multichannel DAC's.
You can open it and see what's inside.

Thanks for the reply. I opened it up already. It's mainly CS4382 => OPA2134 (4 of them for Stereo, L/R front, L/R rear, center, and bass) => Silmic ARS => outputs. The quality is very high (surprisingly), but still I want to improve the power supply section. The problem is that there are too many capacitors. I cannot change all of them. It would be much easier for me to have a schematic so that I could pick and choose which ones to change.

[SoNic_real_one]

Ah CS4382 - it is better done than their usual stuff. Still a voltage-output multichannel DAC. OPA2134 don't sound bad at all - I did try them in one of my CD-Players. But swapping them with LM4562, in my configuration, improved the sound. It might not be your case thou...

Capacitors - start with the ones close of DAC/OpAmp stage. Smaller ones are usually coupling/DC blocking and you can try parallel them with some polypropylene. Big ones (over 100uF) are power rail filters - don't go for low ESR there, they will add spikes/sound bad!