Taramp's TS1200X42OHM TS Line Amplifier Number of Channels - 04 - Pot. Max @ 13.8 VDC (2 OHMS) - 1440 W RMS (4x360W RMS) - Pot. Max @ 13.8 VDC (4 OHMS) - 950 W RMS (4x237W RMS) - Pot. Max @ 13.8 VDC (8 OHM) - 548 W RMS (4x137W RMS) - Pot. Max @ 12.6 VDC (2 OHMS) - 1200 W RMS (4x300W RMS) Pot. Max @ 12.6 VDC (4 ohms) - 792W RMS (4x198W RMS) - Pot. Max @ 12.6 VDC (8 OHM) - 457 W RMS (4x109W RMS) - Pot. In Max Bridged @ 13.8 VDC (4 OHMS) - 1440W RMS (2x720W RMS) - Pot. In Max Bridged @ 13.8 VDC (8 OHM) - 972W RMS (2x486W RMS) Pot. In Max Bridged @ 12.6 VDC (8 OHM) - 810w RMS (2x405W RMS)- Pot. In Max Bridged @ 12.6 VDC (4 OHMS) - 1200W RMS (2x600W RMS) - Damping Factor -&gt; 350 - Frequency Response (Full Range) - 20Hz to 30kHz (-1dB) Bass Boost (Channels 3 and 4) - 0 to 10dB (50Hz) - Input Sensitivity - 160mV (With Mild to 100%.) - Total Harmonic Distortion (THD) -&gt; 0.5% - Channel Separation (Crosstalk ) -&gt; 45dB - S / N Ratio -&gt; 90dB Crossover: HPF (High Pass Filter) - Fixed 100Hz (-12db / 8 th) LPF (Low Pass Filter) - 100Hz (-12db / 8 th)- Input Impedance - 18k ohms