Extron XPA U 2002 SB is an ENERGY STAR qualified two channel audio power amplifiers with a flexible output that can drive 8 ohm, 4 ohm, 70 volt, or 100 volt loads. The bridgeable channels can deliver two 200 watt channels into low impedance systems or a mono 400 watt channel into low or high impedance systems. A rotary switch on the rear panel makes it quick and easy to select output mode. The convection cooled, plenum rated enclosure of the XPA U 2002 SB does not require empty rack spaces for ventilation and includes rack mount hardware. It features a highly efficient advanced Class D amplifier design with defeatable auto standby, fast wake up from standby, and our patented CDRS Class D Ripple Suppression. XPA Ultra SB models also offer remote volume and mute control with Extron VCM, VC or select MediaLink controllers.