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RE: What we learned and cling to from decades past no longer apply

73.229.163.4

In Reply to: RE: What we learned and cling to from decades past no longer apply posted by Leo loves music on July 01, 2024 at 09:15:25

" One thing to check out a class D (or any amp) is that they have a good control when signal is near zero."

Not sure what you mean by "good control" when signal is near zero.

If you're talking about no noise or hiss, my Class D amp is dead quiet.

On the other hand, my early Class D PS Audio HCA-2 from 20+ years go did have a slight amount of hiss. It was enough to be annoying. These amps were initially shipped with very high gain (something like 30dB). PS Audio later reduced the gain a few dB which corrected the issue for most people.

Follow Ups:

RE: What we learned and cling to from decades past no longer apply - morricab 13:09:53 07/02/24 (0)
That was a horrible sounding amp. I had one that I took on trade and it sounded like garbage.
RE: What we learned and cling to from decades past no longer apply - Leo loves music 11:28:31 07/01/24 (0)
a "good control" means grasp the speakers firmly and do not let them run freely.

It is not about the noise.

This is a very basic concept in amp design.
Some early or sloppy class D designs have trouble with offsets - Ralph 11:25:23 07/01/24 (0)
And you hear those problems at lower volume levels. Any competent design won't have this issue though.

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