Electronic Crossover Network Line Outs for 3/4 Channels Bass Boost Circuit Tri-Mode Capable Gold RCA Inputs idgeable at 4 Ohms 2 Ohm Stereo Stable Advanced Protection Circuitry Stiffly Regulated PWM-Type Power Supplies Variable Input Level Controls for Each Pair of Channels Frequency Response: 15Hz-35kHz Variable Low Pass Filter Control: 40Hz~350Hz Variable High pass Filter Control: 40Hz~3kHz Variable Bass Boost Control: 0dB-6dB-12dB (SW) High-Efficiency, Heavy Aluminum Heatsink Power Protection LED Indicators Soft Turn On/Off S/N Ratio: >95dB Fuse: 30A x 2 9.33"(W) x 2.56"(H) x 14.57"(L) 4 x 275 Watts RMS at 4 Ohms 4 x 550 Watts MAX at 4 Ohms 4 x 495 Watts RMS at 2 Ohms 2 x 1100 Watts MAX at 4 Ohms MONO