Lanzar OPTI1000D Competition Class Mono Block Digital Amplifier Mono Block Subwoofer Amplifier 1 Ohm Stable MOSFET Power Supply PWM (Pulse-Width-Modulated) System Double Sided Epoxy PCB Circuit Board Gold Plated RCA Inputs Custom Terminal Block for Speaker Connections Thermal, Overload & Short Protection Remote Bass Control Soft Turn On/Off 350 Watts RMS Power into 4 Ohms 650 Watts RMS Power into 2 Ohms 900 Watts RMS Power into 1.3 Ohms 1000 Watts Max Power into 1.3 Ohms THD @ 1Watt/4 Ohm: 0.1% S/N Ratio: 90dB Frequency Response: 15Hz - 150Hz (+/-3dB) Damping Factor @ 20Hz/4 Ohms: 400 Variable Low Pass Filter: 50Hz-150Hz, 24dB/Octave Variable Subsonic Filter: 15Hz-40Hz, 24dB/Octave Variable Bass Boost: 0 to +18dB Phase Shift Control: 0 to 180 Input Sensitivity: 200mV ~ 8V Input Impedance: 10k Ohm Line Output Impedance: 100 Ohm Fuse Rating: 30A x 4 Dimensions: 10.08'' (W) x 2.12'' (H) x 12.59" (L)