MTX AUDIO THUNDER564 4-channel car amplifier 70 watts RMS x 4 VINTAGE
70 watts RMS x 4 at 4 ohms. 140 watts RMS x 4 at 2 ohms. 280 watts RMS x 2 bridged output at 4 ohms. requires 4-gauge power and ground leads — wiring and hardware not included with amplifier. ThunderEQ bass boost (up to 18 dB at 40 Hz).