To run automotive sized speakers directly from any small portable source (radio, CD player, MP3 player, etc.) you’ll need this powerful, compact 12 volt amplifier. The state of the art electronic works are housed in a sturdy forged metal case with extensive aluminum heat sinks. Features two RCA patch cables, a universal line-level input with standard 3.5mm stereo plug, and a built-in crossover/filter selector with adjustable input levels. Includes Comprehensive installation instructions. Loud stereos save lives. You provide the speakers. Easy to mount and powerful. 100 watt peak output (50 watts per stereo channel), 4 Ohms @13.8vdc. Only 4"×2.5"×1.5".