Meatwad650;229808 Wrote: > Yeah - the amp's power supply has a 3-pronged plug. But is the mains ground connected to the amp's ground plane? To check this, connect a multimeter between the ground pin on the mains plug and the screen the an amp input socket. If the resistance is not 0 (or very close to 0), then the mains ground is just there as a safety measure, but is not shunting the signal ground to earth.
Meatwad650;229808 Wrote: > I called SlimDevices yesterday and the guys in MTV said that it was a > known issue with the power supply. I'm gonna go pick one up tomorrow > afternoon and I'll let you guys know if it addresses the problem. A relevant issue I know of with the stock power supply is that it has a fairly high level of mains frequency ripple on its nominally 0V line. And if the system doesn't shunt that ripple to earth, then it becomes part of the signal - ie. you get hum. If this is indeed the source of your hum, replacing the power supply with another one that has no ripple will fix the problem. Ironically, the reason another power supply has no ripple could well be because it's grounded. And it would be much cheaper to just keep the stock power supply and hook up a ground to the system. -- cliveb Transporter -> ATC SCM100A ------------------------------------------------------------------------ cliveb's Profile: http://forums.slimdevices.com/member.php?userid=348 View this thread: http://forums.slimdevices.com/showthread.php?t=38588 _______________________________________________ discuss mailing list [email protected] http://lists.slimdevices.com/lists/listinfo/discuss
