High performance professional power amplifier. Front panel LED displays indicate power, clip protect and signal status. Balanced XLR and TRS Input connectors. Speakon NL-4 locking output connectors and binding posts. Detented 21-position input level control knobs. Defeatable limiter and high pass filter per channel. Short circuit, thermal, current limit, DC offset, current inrus, RF protection, Turn on/ Turn off muting protection. 5-way binding post and Speakon output connectors. Flow-through cooling design prevents overheating with continuously variable speed, front to rear. Frequency Response: 0/-0.5dB ; 20Hz-20KHz, 0/-3dB: 5Hz-60KHz, Rated Output Power (Stereo): 400 watts at 8 ohms; 600 watts at 4 ohms; 900 wats at 2 ohms, Rated Output Power (Mono): 1200 watts at 8 ohms; 1800 watts at 4 ohms At Full Power @4 ohms: 19.5A / 9.5A, Signal to Noice Ratio: 20 Hz - 20kHz - 102dB, Distortion (SMPTE-IM): .01%, Output Circuitry: AB, Damping Factor (400 Hz): 280. Colour: Black.