-Dual 70V output amplifier channels 3 power levels: 600W, 450W or 300W per channel for 70V speaker systems Low noise, low distortion, and high slew rate High efficiency class H amplifier design Transformerless direct drive outputs Electronically balanced high-impedance inputs Pluggable screw terminals for input connections Independent Low Cut filters (per channel) Independent input sensitivity switches (per channel) Built-in power sequencing for multiple Black Max amplifier installations Pluggable screw terminals for sequencing wiring Rear-panel power sequencing status indicator Overload, short circuit, and thermal protection circuits Input signal channel link switch DC and clip limiting circuits for speaker protection Power -saving sleep mode for intermittent use applications Status, Signal, and Limit indicators Back-Slope™ AC voltage stabilization for dependable performance over varying AC line voltages Heavy-guage steel chassis with cast aluminum front panel Rear-mounted volume controls Directly stackable, mounts in 2 rack spaces (2 RU) without the need for extra space above or below 2 independent, continuously variable, cooling fans for dependable and quiet operation Easily removable front fan grilles with filters Listed to UL Standard 60065 for US and Canada