Sleek aluminum heat sink; Low voltage RCA inputs; 4 operation modes--4-channel stereo, dual stereo bridged, stereo + bridged mono & dual bridged mono; High level inputs for OEM tie-in with Molex(R) adapter; Preamp circuitry; LED system protection circuitry; Variable input voltage ; Nickel-plated output connectors; Onboard electronic crossover; 2,500W max; 4 channels; Dim: 2"H x 11"W x 10.25"D;