This tube-driven preamp features 2 channels, each with full equalization that can be switched or combined to create Billy's original dual SVT sound. Each channel has a separate transformer, balanced XLR line outputs, and discrete effects loops. Each also features 3 tone controls with sweepable mids, and ultra low/high boosts. Other features include input pad, pull gain boost, compressor, noise gate, mute function, and tuner out.