Power Acoustik PWM-16 Pre-Amp Equalizer Type: Signal Processor / Noise Isolator Specifications: Pre-Amp Equalizer with18dB/Oct. Isolated P.W.M. Power Supply Maximum Output Voltage-8 Volts Rotary Input/Output Controls Subwoofer Crossover Variable from 30-250 HZ. Subwoofer Gain Control Front to Rear Fader Control Master Pre-Amp Output Gain Control Three Level Parametric E.Q. Selectable Input Between CD/Radio S/N Ratio II0 dB. @ 1Volt (Aweighted) T.H.D. @ 20-20KHZ. 0.05% Parts: 1 year limited Labor: 1 year limited