Class D is just Dandy!

Hello Al, Ralph, all,

I disconnected the inputs on my stereo dual module Class D amp last night, and the right channel was silent. Inexplicably, the left channel was still noisy. Today, I rounded up some spare I/C's that were long enough to reach between the preamp/processor and the amp, disconnected the leads from the pre-pro to the separate tube preamp, and connected the amp directly to the pre-pro. The two channel and three channel Class D Audio amps are now quiet as a tomb.

From here on out, all my HT and multi-channel listening will be through the Class D amps, and two channel listening will be through the SET 300B and Transcedent Sound Grounded Grid preamp.

So your idea of the problem being input-related was spot-on. I also found I had my surround speakers connected to the rear surrounds on the pre-pro, which may have been causing some of the problems as well.

So, everything is working much better now, though I will be limited in my use of the Class D amp. I will have to re-think my connections to see how I can better utilize the Class D stereo amp, but at least for now, mission accomplished in attaining blessedly silent noise-free listening.

For that, I can't thank you men enough. Having your input on this forum is a true blessing!

Regards,
Dan 
  

^^Good work- Glad you got it sorted!

Glad to have been helpful, Dan.  Enjoy!

Best regards,
-- Al
 

Jump on 2 amps  ASAP if they are so great(not).

     Very nice to see almarg and atmasphere team-up, step up and use their knowledge/experience to solve islandmandan's noise problem. Nice job guys!

     What I've consistently noticed from listening to good class D amps in my system, from my initial Class D Audio SDS-440-CS stereo amp to my Emerald Physics 100.2 to my most recently purchased D-Sonic M-600 mono-block amps, is their exceptional quietness;  music seems to emerge with more impact due to the dead quiet background.
     I believe this silent quality is also a primary contributor to the other obvious characteristic of good class D amps: a very detailed presentation..

      I'm almost certain these class D attributes will now be very evident to  islandman  now that his amps are operating in their typically silent manner.

Enjoy,
 Tim