Lanzar OPTI1600X2 OptiDrive 2-Channel High Power Amplifier (Discontinued by Manufacturer) 1600 Watts x 2 RMS Power 4 ohms - Bass Boost Circuit - Line Outs for Left and Right Channels - Thermal, Over load & Speaker short protection - Channel Separation: 60dB - Input Sensitivity: 200mv ~ 8V 3200 Watts x 2 Max Power 4 ohms - Bridgeable at 4 Ohms - Low Pass Filter Controls - Soft Turn-on/Turn-off - Frequency Response: 10Hz - 35KHz - Fuse Rating : 250 AMP ANL x 2 6400 Watts x 1 Max Power 4 ohms Bridged - 2 ohm Stable - High Pass Filter Controls - Minimum Speaker Impedance : 2 Ohms - Variable Low Pass Filter : 50Hz - 120Hz - Dimensions : 11.42 x 2.68 x 35.43 Inches