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Discussion in ‘ General Audio Discussion ‘ started by onanysundayNov 21, This is the sort of thing I am curious about.

CC Dual Ultra-Low Noise Wideband Op Amp – $

Log in or Sign up. You need a service manual and schematic. While your is different internally there are many similaritys and what I’ve done will be applicable to your player.

In the mean time here is what I was doing before I got thesome of it will be useful to you. He said that in the applications non audio where he is using op-amps the parallel 0. Give me a week or so and I’ll look through the schematic and give you some recommendations as to re-capping based on what I’ve done with a DCD,and I have to look at a schematic of your first but am guessing that like my it uses a muting relay and so doesn’t suffer from the issues that muting transistors give.


Surplus Electronics Sales in located in Arcanum, Ohio. The op-amps in the digital section are being used for different functions than in the analog section and there is no need to change them AFAIK. Swapping the output opamp, or the passive components in the reconstruction filter, could conceivably make some audible improvement, but it’s unlikely.

(PDF) C4570C Datasheet download

It is an excellent choice for pre-amplifiers and active filters in audio, instrumentation, and communication circuits. It looks fine for audio, certainly not a piece of junk. DaveVoorhisNov 24, I also changed the caps in the audio datqsheet.

I have only replaced op-amps in the analog sections of the players. In the end I used some more LME in that position also and imho there was a definite sound improvement.

But after first swapping op-amps in my PC sound card and now 10 cd players, I am firmly in the belief that these op-amps do indeed need some burn-in time to sound their best. You have a fine CD player there. Far beyond my abilities to comment on.

You must log in or sign up to reply here. Out of order response s: And I am concerned that changing an op-amp in the digital section might require re-calibrating tracking, focus etc and I don’t have the tools or experience to do that. The CC is a dual ultra low-noise wideband high slew-rate operational amplifier.


I datashfet tried Silmics and then Nichicons.

I kept the Nichicons in there because I liked how they sounded. I don’t know what Op-amps Denon has in your unit but the swap to LM’s was a definite, across the board improvement in my player.

Any real improvement to be had by swapping about those Silmics to let’s say, new Cerafines? Bratwurst7sDec 1, I don’t know about Denons but the Sonys seemed to be sensitive to power delivery. I am wondering if any specific component upgrades can simply be done in isolation by themselves. And swapping a dac isn’t a simple thing. This was done after an Op-amp swap LM By all means replace the op-amps datxsheet sockets, then you can easily try v4570c different versions.

What I didn’t expect was that the low end had a slightly deeper, more powerful sound to it.