car amplifier 1. Aluminium heatsink 2. 80WX2 3. Good sound quality Car amplifier2 CH CAR AMPLIFIEROutput power RMS: 4 OHM, 80W x 2 CHOutput power RMS: 2 OHM,140W x 2 CHOutput power RMS: 2 OHM,280W x 2 CH(BRIDGE RMS) :4 OHM, 280W x 1 CHAt BRIDGE MAX: 4 OHM, 600W x 1 CHSensatitive: 90 dBFrequency response: 10HZ-50KHZTHD:≤0.05%Power supply: DC 10.8-14V Car amplifier