ezkcdude Wrote: > I thought my statement was fairly transparent. Simply the fact that a > power supply is linear does not necessarily make it a good one, nor > does it necessarily make it better than any switching supply. What > part of that is not clear?
A I got the ball rolling on this one, I can try an answer... Whether a powersupply is linear or switching does not imply quality or the lack of it. You are right there. The reason I am sceptical to switching powersupplies in an audio setting, is in the way they work. Switching power supplies chops up AC to a higher frequency so it can use a small transformer. This is usually done to save costs or space (linear PSU needs larger transformer that are expensive and heavy). "So what?" you may ask. A badly designed linear PSU will introduce ripple into your sound system (50 or 60Hz) as it doesn't have adequate filtering. But that's it, and it is cheap to filter out. A switching powersupply will add a high frequency noise in addition, so you need to filter both the 50Hz (or 60Hz) and the high frequency introduced with the switching technology. As an example: I have experienced more than once that switching PSU's have ruined FM reception when I have had a switching PSU close to my FM tuner. So basically, my experience with switching PSU's are that they don't belong with quality audio equipment. Hope that this did clear up a few points. Tom -- tomsi42 SqueezeBox2, Rotel RC-1070/RB-1070, dynaBel Exact. ------------------------------------------------------------------------ tomsi42's Profile: http://forums.slimdevices.com/member.php?userid=2477 View this thread: http://forums.slimdevices.com/showthread.php?t=20844 _______________________________________________ audiophiles mailing list [email protected] http://lists.slimdevices.com/lists/listinfo/audiophiles
