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Old 9th August 2002, 07:01 PM   #11
csd is offline csd
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Join Date: May 2002
Location: Pennsylvania
Peranders,
I'm using Vandersteen 2ce's, which are not quite at the Martin Logan SL3 price point, but are certainly no slouch. I heard them at my dealer through a Musical Fidelity A3, CD player I don't recall. They were absolutely smooth and clear through the high end.

My main amp/preamp is a Denon AVR-3300, but I have tried going straight from the CD player into a Harmon Kardon Citation 16 power amp with just an attenuation network. Same exact sibilance and graininess in the high end as the Denon. (Harmon Kardon was more effortless, however) Since I was able to partially tame the high end by CD player tweaking, my thinking is that there is more room to go. I may very well have reached the point of diminishing returns with this player, however!

Elso,
Reclocking and zero-oversampling are certainly valid things to try, but the SAA7431 in the Philips 920 handles all input conversion, oversampling, D/A, and I/V conversion, so not much I can do there! BTW, your clock circuit works very nicely, and I believe it made the greatest sonic improvement.
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Old 14th August 2002, 07:48 AM   #12
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Join Date: Feb 2002
Location: Germany
csd,

as everything is inside the decoder chip, further effort is pretty much wasted unless you bite the bullet and install an SPDIF receiver and a new DAC. As long as you have a good master clock and use this to clock both decoder and DAC, you don't have to worry about jitter being induced by the receiver chip. If there is a way to run the receiver in slave mode, i.e. without its internal VCO, it will work even better.
I'd check first if the DOUT pin is really active because in most Philips decoder chips, it can be deactivated by software (but this is rarely done).

I have a cheap, cheap Kenwood player with a simple Sony drive. The supply and grounding scheme is just terrible. In fact, just increasing the main electrolytic made it blow its soldered TO-92 fuse.

Clocking this player in slave mode, i.e. from an external DAC, I got superb sound. So as long as the drive reproduces the digital signal correctly (no missing data), I doubt there is any need to get into optimizing the drive and drive electronics (appealing as it may be).

Eric
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