Crown XLi3500 Two-channel, 1350W at 4 Power Amplifier Stereo/parallel/bridge-mono mode User selectable input sensitivity - 0.775V and 1.4V Electronically balanced RCA & XLR inputs; binding post and Speak on outputs Efficient forced-air cooling prevents excessive thermal buildup Two level controls, power switch, power LED, and six LEDs which indicate signal presence, clip and fault for each channel Input: balanced XLR (x2), unbalanced RCA (x2); Output: Speak on (x2), Binding Post (x2 pair) Power: 1350W at 4, 1000W at 8 AC input voltage: 120V~60Hz