DSM Humboldt Simplifier Classic

Effect Type: Zero Watt Stereo Amp Simulator
Connections: Input, Send, Return (L+R), Headphones, Aux, FX Out (L+R), XLR Out (L+R)
Knobs: Mic Position(L+R), Presence, Resonance, Treble, Mid, Bass, Gain, Volume
Switches: Cabinet Size (L+R), Tube type, Amp style
Power: 9V DC, center negative