Extron XPA U 1004C is an ENERGY STAR qualified audio power amplifier delivering four 100-watt channels in a half rack, 1U, convection cooled, plenum rated enclosure that includes rack mount hardware. The XPA U 1004C-70V simultaneously delivers 100 watts into two channels at 8 or 4 ohms and 100 watts into two channels at 70 volts while the XPA U 1004C-100V delivers 100 watts into two channels at 8 or 4 ohms and 100 watts into two channels at 100 volts. The XPA U 1004C offers unprecedented channel density and the ability to install units without using rack spaces for ventilation, conserving precious rack space. It features a highly efficient advanced Class D amplifier design with power factor correction, ultra-low inrush current, defeatable auto standby with fast wake up, and our patented CDRS Class D Ripple Suppression.