If the issue is RFI being generated by the supplied wall-wart, making it across the SB3 onto the analog output cables, then a cheaper solution would be to put an RF choke, (wrap the DC cable into a bunch of turns around a ferrite bead,) right before the cable goes into the SB3.
I looked at the noise once on an analyzer, and it seemed significant from around 200 KHz and going up from there - significant in that if I remember correctly, it was around -30 to -40 dBm when it made it to the SB3 DC input. However, I found that the AM signal strength that was picked up by that cable was comparable - and that would be going into the SB3 as well. I found that the noise was only an issue when listening to AM radio on my tuner. If I turned my preamp to an empty input, and cranked the volume to insane levels - I heard nothing. I do believe the linear supply helped improve the analog output quality of the SB3, but I don't think the RFI suppression had anything to do with that - and the improvement was slight. Going to an external DAC made a much more discernible difference. -Ron -- Ron F. *Squeezebox setup:* wireless SB3 -> CI Audio VDA.2 DAC + VAC.1 PSU *Main rig:* NAD 7600 + NAD 2600A -> Phase Tech PC-6.5 speakers *Headphone rig:* Headroom Max -> Sennheiser 650s *Music Server:* Nano-ITX computer running SlimCD + 750 GByte HDD -> Netgear wireless router *Other stuff:* NAD C542 CDP, NAD 6300 Tape, Monster 5100 Power conditioner, Outlaw Audio cables ------------------------------------------------------------------------ Ron F.'s Profile: http://forums.slimdevices.com/member.php?userid=5616 View this thread: http://forums.slimdevices.com/showthread.php?t=38738 _______________________________________________ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/audiophiles
