The Xantech PA4100X 100 Watt 4-Channel Power Amplifier was designed to meet the audio power amplifier needs of custom installed multi-zoned systems with high sonic quality and hi power output. It is a 4 Channel amplifier that is primarily intended to interface with the MRC88 Whole-house Audio Video Entertainment System for Zones 7 and 8 Preamp outputs or for Sub-Zone amplification of zones 1-6. It may also be used as a standalone 2-zone amplifier. Four 100-watt power amplifiers permit the PA4100X to drive 2-zones in a multi-zone system - each with a 100-watt stereo amplifier per zone. Each amplifier is 4-Ohm safe under music conditions. This means, for instance, that you can drive two pairs of 8-Ohm speakers in stereo mode in each zone with ease. Whenever either amplifier channel output starts to enter a clipping state, the channels front panel LED will illuminate RED. After the amp stops clipping the LED will return to its normal state 5-6 seconds after clipping stops. The Auto Protection Circuit protects the PA4100X if a short or very low impedance is detected at the speaker terminals with each amplifier pair protected separately. Normal operation is restored automatically within 3 to 4 seconds after the short is removed.