
To allow bass level control of the amplifier, mount the bass control in a convenient location in the passenger compartment. 2) RCA INPUT/RCA OUTPUT Connect these RCA connectors to a head unit with a LOW LEVEL output connection. Use these RCA output connectors to connect to a secondary amplifier. This output is a selectable by the Crossover Selector switch. 3) SUBSONIC FILTER This is a variable control that filters out all Sub Bass Frequencies point at 18dB/octave. 4) LOW PASS Set the cross