Sound Digital Marine/PowerSport Amplifier 4-Channel (4 Ohm)

Power @ 4: 4 X 330 WRMS Power @ 2: 4 X 500 WRMS Power @ 1: N/A Bridge Power @ 4: 2 X 1000 WRMS Bridge Power @ 2: N/A Operating Voltage: 8V – 16V Current Draw (Music): 85 A Current Draw (Max): 171 A Recommended Fuse (Music): 90 A Total Efficiency: 81% Damping Factor: 200 Frequency Response (-3dB): 5Hz – 22kHz SNR: 90dB Crossover HPF: 45Hz – 850Hz Crossover LPF: 45Hz – 850Hz THD + N (10% Rated Power): 0.1% Product Dimensions: 8.4 x 5.8 x 2.4 in Product Dimensions: 21.4 x 14.9 x 6.2 cm