Ashly SRA-4075 Amplifier Four Channel 40 Watt Ch at 8 Ohms 1RU Chassis Class D Output Circuitry 1RU 10 lb. lightweight rackmount 4-channelpower amplifier with 40 Watts per channel power output at 8 Ohms On-board 80Hz HPF, selectable gain sensitivity Selectable Dual or Bridge Mono Operation, designed for 4- or 8-Ohm loads Up to 8 sec. of turn-on delay with selectable Dip Switch complement Ultra-quiet convection-cooled operation