Denon DCD-S 10 II clock

[rfbrw]

Even if I'd known of a block diagram, I would've still suggested clock mod because it works. I'll repeat myself: The external clock and its low noise clock signal at pin 6 is ALWAYS present at internal “clock selection” block of this receiver chip, via internal oscillator, constantly influencing its performance – even if / when the VCO takes over. This is what I see from the block diagram.

The only reason it is always there is because one chooses to have it there. As has been pointed by others far better qualified than me, it can be disabled by grounding pin 6.

My experience tells me that the mod is worthwhile. There's no uncertainty about this. I have checked my backup and reminded myself of Audio Note DAC 3 which I modified the same way - it produced great results; same YM chip with XO2 clock and dedicated low noise power supply.

An audiophile and his money are soon parted. I happen to have a DAC3 and fiddling with that oscillator is a waste of time.
Then again, you are a fan of asynchronous reclocking, so the sonic effects of a free running oscillator with no particular use when the audio is playing would probably be to your taste.

We have different approaches and strive different end results.

Yes.I prefer the Emperor to actually have some clothes.

I find your ways of having fun at other's people expense rude and sick.

Boky

Rude, I can live with but sick ? What is it about you and your ilk that causes you to loose all perspective ? Compared some of the things going on around us, mocking the gullible does seem a little tame.

 

[Glassman]

I'll repeat myself: The external clock and its low noise clock signal at pin 6 is ALWAYS present at internal “clock selection” block of this receiver chip, via internal oscillator, constantly influencing its performance – even if / when the VCO takes over. This is what I see from the block diagram.

that's the way I see it too.. replacing the oscillator is not the greatest and most effective idea though, stopping the oscillation after aquiring lock is the way to go.. nevertheless..

 

[jean-paul]

Just came across this thread and stopping/grounding this clock makes a very big difference as was showed by Elektor in its PCM1710 MiniDAC design complete with measurements. They were among the first to stop the clock by one diode. The oscillator clearly interferes continuously and results of stopping/grounding this clock can be heard and measured immediately.

I used this method several times and every time I was surpised by the results. It is one of the cheapest mods around and it is also documented by Elektor magazine as an improvement on their design because of a design error in YM3623B. No self proclaimed expert can claim the opposite.

Elektor claimed the diodemod to stop the clock makes an improvement of 6 dB in THD+N , measured with a bandwidth of 30 kHz. They also used 16 MHz cristals to improve things but this was not enough. Although it has no relation with the samplefrequencies it still interfered. Please see Elektor july/august 1996. They warned to use a diode with very short lead wires to avoid it becoming an antenna as pin 6 is a sensitive pin.

 

[JLPAS]

Hi again , thanks to all ! Ready this I've done nothing , it seems a little bit complicated for me , I use the DCS-S-10 as a drive connected to a Tact RCS or a Micromega Trio DAC .

 

[EIRA]

I have read several threads on modding the DA-500, and really would like to make a few, but most things are just a bit too complicated for me to do just from what I read. (like the 'killing the clock' thread). Does anyone have a bit more instructive description of the most effective mods, and is there a schematics available? Your help would be greatly appreciated.