Class D2 Ohm operation Full MOSFET DC-DC PWM Power Supply4-way protection Low-level inputs (RCA)Variable low-pass crossover (40Hz - 150Hz, @ 24dB/octave)Variable bass boost @45Hz (0dB - 18dB)Variable subsonic filter (20Hz - 50Hz @ 24dB/octave)Phase shift 0 Degree or 180 Degree (switchable)Variable gain control Remote bass control included2 AWG power and ground terminal block4 AWG speaker wire terminal block Amplifier bridge mode to connect 2 amplifiers to one sub Power Requirements: 14.4V DC (11V to 16V)Input Sensitivity: 250mV - 6VFrequency Response: 20Hz - 150Hz (0, -3dB)Speaker Impedance: 4Ohm, 2Ohm or 1OhmSignal to Noise: > 80dB (THD 100