Car Audio Electronic Subwoofer Crossover NetworkProduct Details:Power Source: 12 Volt DC Vehicle BatterySelectable Crossover Frequency: 80 Hz, 125 Hz or 250 HzConnect The RCA Inputs of the Crossover to the RCA Outputs of the SourceConnect The RCA Outputs of the Crossover to the RCA Inputs of the Amplifier That Powers the SubwoofersSpecifications:Crossover Slope: 12 dB / OctaveSignal to Noise Ratio: > 80 dBTotal Harmonic Distortion.: <0.02 Percent at 0.5 - 2.5 Volt OutputPower Requirement: 9 - 16 Volt DCJensen / Roar GearRG806B