I'm using one as a crossover in 2.1 set-up. When the 2x4 is powered via usb from the computer its fine with no noise. However, try and power it with a suitable (correct spec) wall wart or via a usb charger plug then I get a hum (assumed ground loop). My laptop is plugged into the same outlet so have no idea why it's silent through that? Please help!
Is anything actually grounded? With most PSUs being isolated, you may not have a true ground at all. That would be a good starting point, as it allows you to pick one place to ground and star-wire all the other components to that.
Turntables are grounded to the mixer. Pre and power amp and powered sub I have no idea about (no grounding cables). I did wonder about grounding the 2x4 chassis?
Anyone know much about powering a minidsp 2x4?
I'm using one as a crossover in 2.1 set-up. When the 2x4 is powered via usb from the computer its fine with no noise. However, try and power it with a suitable (correct spec) wall wart or via a usb charger plug then I get a hum (assumed ground loop). My laptop is plugged into the same outlet so have no idea why it's silent through that? Please help!