DCtoDaylight;321103 Wrote: > But that's my point... > If they're well designed, they won't be susceptible to mains noise. > Very often I see amplifier circuit designs, which have very poor > rejection of supply noise. If the designer really feels that approach > gives the best sound, then he/she should take much greater care > designing the power supply, to ensure it rejects mains noise. > > You can reject mains noise in the power supply, or in the audio > circuit. In my opinion, products that don't provide adequate rejection > in either, and rely on a quiet mains for good sound, are poorly > designed. > > As always, YMMV! Cheers, Dave
I agree that power supply design is critical. And I think things have changed quite a bit over the last ten years. It's now not uncommon to have at least one piece of hi-fi using an SMPS, even more likely that there is something using an SMPS somewhere in the same dwelling - all corrupting the mains supply. There's a whole lot more RFI floating around than there was, and goodness knows what other mains pollution with the mains cables expected to carry various high frequency signals. Today it is much harder to design a power supply that can cope with all the 'rubbish' on the mains. In addition, the power of the accountant has grown to the detriment of the designer. Probably an audiophiles best friend these days is some sort of isolation transformer, better still smaller ones between equipment in the same system. I don't think that we can just rely on the power supply being properly designed any more. Of course all this is variable and depends a lot on your location, and a lot on what other equipment you have in your home/system. And that probably accounts for many of the disagreements amongst us about the performance of our equipment, and the reasons for that performance! -- Nuuk ------------------------------------------------------------------------ Nuuk's Profile: http://forums.slimdevices.com/member.php?userid=4844 View this thread: http://forums.slimdevices.com/showthread.php?t=49763 _______________________________________________ audiophiles mailing list [email protected] http://lists.slimdevices.com/lists/listinfo/audiophiles
