Vector Audio DS4500V Power Amplifier 4 x 500watts @ 4 ohms, 2 x 800w 100volt
It features a 1U rack space design, Class D circuitry, and various protection functions. Power Output: 4 x 500 watts at 4 ohms. Signal to Noise Ratio: >100dB. Input Connectors: Phoenix. Input Sensitivity: 0.775V.