Bogen's Black Max amplifiers are designed to provide maximum performance in constant voltage speaker systems. Dual 70V transformerless outputs deliver exceptionally clean, full bandwidth audio to speaker systems. Up to 1200 watts of total output power on two separate channels of audio (up to 600W per channel/zone) are available in a single unit. High efficiency class H amplifier design and auto-sleep feature reduce power consumption on continuously-powered systems. Specifically designed for the fixed install market with features like: rear-mounted volume controls, independent Low Cut filters, independent input sensitivity switches, input channel link switch, and pluggable input screw terminals. Built-in power sequencing for controlling multiple Black Max amplifiers combats AC current in-rush problems of large audio systems. Massive power toroid and heat sinks; heavy 14-gauge chassis; Back-Slope AC voltage stabilization; clip limiters; and DC voltage, over-current, and thermal protection circuits make this a true workhorse amplifier. Dual 70V output amplifier channels 600W power level 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-gauge steel chassis with cast aluminum front panel Rear-mounted volume controls Directly stackable, mounts in 2 rack spaces (2 R.U.) without 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