Wet Sounds Hydro Tech Series HT-6 Amplifier - Class D 900 Watt Full Range Amp Full-range 6-channel marine amplifier | 300 watts RMS x 3 at 4 ohms in bridged mode | 110 watts RMS x 6 at 4 ohms (150 watts RMS x 6 at 2 ohms) Conformal-coated circuit board | Saltwater-resistant heat sink Frequency response: 10-20,000 Hz | Variable low-pass and high-pass filters | Variable bass boost: 0-12 dB at 45 Hz Rugged water-resistant design | Stainless steel hardware Dimensions: 15-1/8"W x 7-1/4"D x 2-15/16"H