Technical Pro HB2502U, Digital Hybrid Amplifier/Premap/Tuner with USB and SD Card Inputs, Black 2 Channel Amp/Pre-amp/AM-FM Tuner (4 Main Speaker Output, 3 Surround Sound Speakers) 2500 watt maximum power Provides a dynamic range that can handle the most demanding soundtracks without running out of headroom-110-220V for worldwide usage USB / SD CARD / MP3 input / 2 mic inputs - RCA inputs & banana outputs - 2 mono RCA dedicated subwoofer output- 1 RCA dedicated preamp output 2 rack space rugged metal chassis with handles- Efficient forced-air fans prevent excessive thermal buildup-separate preamp, subwoofer gain control Microphone volume, bass, treble and echo controls - digital fluorescent output display meter - - removable rack mountable ears included