Thanks! I was able to play with it in stereo and got it mostly figured out. I was just wondering about TS. With TRS in mono mode, it plays mono to one amp so it sounds like it is designed for TS only with the switch in mono. I didn't experience a significant enough hum with my little Carvin amps so far, so it looks good to go with stereo. The trace AH-400 amps produce a loud hum in stereo. I think the lift switch on those disconnects the ground wire to the wall and the power supply but it's been years since I looked.