wayne325;420007 Wrote: > > I'm not doing parallel DACs in my current design, although I am using > the > same DAC chips and fully balanced (2 chips per channel). I want to > become > successful with my first foray into this before I get really tricky > and > start laying down FPGAs and have to learn how to do digital filtering > and > cubic splines and such.
Listened to the DAC today for the first time - running off my CD player. Now I better get going on the power supplies. And I guess I'd better buy a Tranporter now to test and listen to !!!!! THe DAC is a home-grown one... I use a CPLD for input switching, clock switching, decoding the C-channel data and the like. Use a DIR9001 receiver, SRC4192, and dual PCM1704/K DAC chips per channel - I run full balanced. The analog portion is all discrete. Planes are split - 2 analog and 1 digital. And there are a dozen or maybe 15 regulators. I can't count them all !!! Here are my quick notes - it's my new DAC compared to a decade-old Classe CDP.3 CD player that also was the S/PDIF source for the DAC: --------------------------------------------------------------- First listen 7/22/09 !!!!! The first impression is quite good. Its smooth, sounds a bit rolled off in the highs although the highs are definitely there and sound clearer and crisp but quieter. Its difficult to do critical listening with the fans of the power supplies going. Also AC units and TV in the other room. Output voltage is down maybe 2 or 3 dB compared to the Classe CDP.3 Ive had for many years. Maybe I can adjust it a bit higher. Compared to the Classe, it sounds more rounded, smooth, mellow. Also very detailed hear sounds Ive never heard before, and some sounds Im very familiar with sound quite a bit more clear less . Muddy perhaps. The thing is dead quiet, at full volume there is absolutely no sound coming from it whatsoever and its not even in a case and has wires hanging all over the place. The Classe sounds more etched, strident, or grainy in comparison and is definitely more noisy like hissing sound and ghosts of the music ie noise that is correlated to the signal and the DAC has none of that. Im really surprised at how different this DAC sounds from the Classe CD player. Also must keep in mind this thing is nearly new. It ran in for 6 or 8 hours on the bench today and I didnt give it any warm-up time at all before I started listening just powered it up and started to listen. -- wayne325 ------------------------------------------------------------------------ wayne325's Profile: http://forums.slimdevices.com/member.php?userid=29916 View this thread: http://forums.slimdevices.com/showthread.php?t=62747
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