SPECIFICATIONS Max Power Output Ratings Total Max Power: 640W RMS Power Ratings Per Channel into 2 Ohms, 14.4V (≤1%THD+N): 4 x 80W Per Channel into 4 Ohms, 14.4V (≤1%THD+N): 4 x 55W Bridged into 4 Ohms, 14.4V (≤1%THD+N): 2 x 160W Sound Tuning Crossover: Variable LPF, 50-400Hz (-12dB/oct ) Crossover: Variable HPF, 50-400Hz (-12dB/oct ) General Power Requirements: 14.4 V.DC (9 - 16 V allowable) Input Sensitivity (RCA Input): Hi: 0.5 - 10 V Lo: 0.2 - 4.0 V High Level Input with automatic power on Cable size: Power Cable AWG 8, SPK Cable AWG 10 Frequency Response (+0, -3dB: 1W into 4 ohms) for CH-1/2/3/4: 10Hz - 30kHz THD+N (@ 10W into 4 ohms): <0.03% THD+N (@ 50W into 4 ohms): <0.08% Damping Factor: >100 Signal to Noise (@ 50 Watts into 4 Ohms): >98dB Weight: 1.9 kg Dimensions Heat Sink (WxHxD) mm: 204 x 58 x 204