RE: Class D Audio modules noisy when bridged to mono

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Posted by JURB (A) on April 22, 2017 at 18:04:04

In Reply to: Class D Audio modules noisy when bridged to mono posted by islandmandan on April 18, 2017 at 10:48:38:

I have cut back on technical posts because the PTB think I don't know what I am doing, though I have been repairing, designing and building for forty years.

Most likely the oscillators in the two units are close in frequency but not locked. The optimum solution should this be the case would be a simple cap between certain circuit points in each to make the oscillators sync. You would need a print, or at least the spec sheets on the chips that run them. If totally discrete component and no print you have to do reverse engineering. That is a big PITA on modern equipment. I used to be quite good at it but between my eyesight and multi layer boards them days are pretty much over. You have to scope everything out now and sometimes kinda guess.

If you can post up the print for these amps I can probably tell you the modification to do to fix this.

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Follow Ups Full Thread

Topic - Class D Audio modules noisy when bridged to mono - islandmandan 10:48:38 04/18/17 (9)

RE: Class D Audio modules noisy when bridged to mono - EricSan 10:05:08 04/25/17 (1)

RE: Class D Audio modules noisy when bridged to mono - islandmandan 11:51:06 04/25/17 (0)

RE: Class D Audio modules noisy when bridged to mono - islandmandan 15:15:33 04/23/17 (2)

RE: Class D Audio modules noisy when bridged to mono - JURB 23:48:05 04/23/17 (1)

RE: Class D Audio modules noisy when bridged to mono - islandmandan 12:52:43 04/24/17 (0)

RE: Class D Audio modules noisy when bridged to mono - JURB 18:04:04 04/22/17 (3)

RE: Class D Audio modules noisy when bridged to mono - islandmandan 15:00:22 04/23/17 (0)

RE: Class D Audio modules noisy when bridged to mono - islandmandan 14:56:05 04/23/17 (0)

RE: Class D Audio modules noisy when bridged to mono - islandmandan 13:22:48 04/23/17 (0)

Follow Ups

RE: Class D Audio modules noisy when bridged to mono - JURB 18:04:04 04/22/17 (3)

RE: Class D Audio modules noisy when bridged to mono - islandmandan 15:00:22 04/23/17 (0)

RE: Class D Audio modules noisy when bridged to mono - islandmandan 14:56:05 04/23/17 (0)

RE: Class D Audio modules noisy when bridged to mono - islandmandan 13:22:48 04/23/17 (0)

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