Hope no one minds if I jump into an old thread, but.................. We get questions about things of this nature, all the time. So, if I may be permitted, let me make this one observation.
We have noticed, from time to time, there was a 60 Hz spur, in our phase noise measurements. (Measuring and quantifying clocks is one of the main tasks, in the other side of the business.) It would come and go, and we had a hard time nailing down its cause. Turns out it was the 5 V wall warts, that we sometimes used to warm up clocks, before sticking them in the main test fixture. The reason I point this out it is the same brand, and model, that frequently comes with Squeezebox products. Granted, this noise is pretty far down, in the noise. But, it is there, and we could occasionally see its effects. Can anyone hear this, on their Squeezebox? I dunno.............maybe, maybe not. But, if we can measure it, the possibility exists that one can hear it. For the record, other brands are as bad, or worse. Some models, of the same manufacturer, are better. The SMPS we have looked at seem to be all over the map, and there is no clear-cut good, or bad, brand/model. LPS have their own issues. The answer is there is no 100% correct answer. And we tossed a small handful, of wall warts, just to be sure. http://ar-t.co ------------------------------------------------------------------------ ar-t's Profile: http://forums.slimdevices.com/member.php?userid=13619 View this thread: http://forums.slimdevices.com/showthread.php?t=82648 _______________________________________________ Touch mailing list [email protected] http://lists.slimdevices.com/mailman/listinfo/touch
