Rockford Fosgate Prime R250-1 250 Watt Mono Amplifier Mono amplifier delivers 250 watts at 2 ohms, 150 watts at 4 ohms Variable low pass crossover with 12dB/octave slope and 40Hz to 130Hz crossover point Punch Bass adjustable bass level control of 0 to +12 dB centered at 45Hz RCA inputs for signal level input and pass-through jacks for system building The input gain control is preset to match the output of most source units