AC480: 1) 4CH car power amplifier 2) RMS power@4ohm: 80W x 4CH 3) Bridged mode power@4ohm: 230W x 2CH 4) THD@4ohm: 4) S/N (A-weighted): >90dB 5) Input sensitivity: 0.15 - 2V 6) Frequency response: 20Hz - 40KHz 7) Dimensions (W x L x D): 252 x 350 x 72mm AC275: 1) 2CH car power amplifier 2) RMS power@4ohm: 750W x 2CH 3) Bridged mode power@4ohm: 230W x 1CH 4) THD@4ohm: 4) S/N (A-weighted): >90dB 5) Input sensitivity: 0.25 - 4V 6) Frequency response: 20Hz - 40KHz 7) Dimensions (W x L x D): 252 x 265 x 72mm AC238: 1) 2CH car power amplifier 2) RMS power@4ohm: 40W x 2CH 3) Bridged mode power@4ohm: 120W x 1CH 4) THD@4ohm: 4) S/N (A-weighted): >90dB 5) Input sensitivity: 0.25 - 4V 6) Frequency response: 20Hz - 40KHz 7) Dimensions (W x L x D): 252 x 150 x 72mm AC2150: 1) 2CH car power amplifier 2) RMS power@4ohm: 150W x 2CH 3) Bridged mode power@4ohm: 450W x 1CH 4) THD@4ohm: 4) S/N (A-weighted): >90dB 5) Input sensitivity: 0.25 - 4V 6) Frequency response: 20Hz - 40KHz 7) Dimensions (W x L x D): 252 x 350 x 72mm AC2250: 1) 2CH car power amplifier 2) RMS power@4ohm: 250W x 2CH 3) Bridged mode power@4ohm: 700W x 1CH 4) THD@4ohm: 4) S/N (A-weighted): >90dB 5) Input sensitivity: 0.25 - 4V 6) Frequency response: 20Hz - 40KHz 7) Dimensions (W x L x D): 252 x 500 x 72mm