ART Dual RDB, Re-amping interface for multiple amps, Stereo/Dual direct box, Variable Input pad for mic or instrument inputs, Dual 1/4" TRS and XLR balanced line level inputs, Transformer isolated XLR balanced microphone level outputs, Transformer isolated 1/4" TRS balanced instrument level outputs, Frequency Response: 20Hz to 20kHz, Variable Level Controls with Mute, Channel Two source selectable between Channel One or Channel Two Input, Channel Two output phase switch.