Ashly TRA-2150 Amplifier Two Channel 80 Watt Channel at 8 Ohms 70V 100V Class D Output Circuitry by Ashly. 2RU rackmount stereo power amplifier with 80 Watts per side power output at 8 Ohms and built-in 60W/70V transformer. Designed to simultaneously drive 4- or 8-Ohm loads and 70V/100V transformer-coupled lines. 2-stage high-efficiency switched mode power supply with high power-to-weight ratio. Ultra-quiet convection-cooled operation. On-board 80Hz HPF, selectable gain sensitivity.