I am trying to find an easy way to switch very quickly from playing through cabs to headphones without disconnecting a bunch of cables. Here's my setup: Ken Smith 5 string and KSD 70's jazz 5 string ----> Ampeg SVP Pro preamp ----> QSC PLX1602 power amp (channel 1 only) ----> Eden D410T cab. I play CD's, digital music, personal recordings through my PC which feeds into a looping device going into channel 2 of the power amp which outputs to a 2x10 cab. This setup works really well to help me learn new songs since I can loop and slow down a riff. The problem is that I practice late at night when the kids are sleeping. Does anyone know of an A/B type of device where I could just push a button to have both channels output to a headphone amp? Are there any other options that will allow me to do this?