Extron XPA U 358 is an ENERGY STAR qualified audio power amplifier delivering eight 35 watt channels in a half rack, 1U, convection cooled, plenum rated enclosure that includes rack mount hardware. The XPA U 358 delivers 35 watts into 8 or 4 ohms while the XPA U 358-70V delivers 35 watts into 70 volt systems and the XPA U 358-100V delivers 35 watts into 100 volt systems. The XPA U 358 offers unprecedented channel density and 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.