Specifications: ARV5150: 1) 5.1CH true MOSFET car power amplifier 2) RMS power@4ohm: 50W x 4CH + 50W (center) + 150W (woofer) 3) Bridge mode power@4ohm: 150W x 2CH + 50W (center) + 150W (woofer) 4) THD@4ohm: 95dB 6) Input sensitivity: 0.15 - 6V 7) Frequency response: 20Hz - 40kHz 8) Dimensions (W x L x D): 252 x 450 x 50mm ARV4150: 1) 4.1CH true MOSFET car power amplifier 2) RMS power@4ohm: 50W x 4CH + 150W x 1CH 3) Bridge mode power@4ohm: 150W x 2CH + 150W x 1CH 4) THD@4ohm: 95dB 6) Input sensitivity: 0.15 - 6V 7) Frequency response: 20Hz - 40kHz 8) Dimensions (W x L x D): 252 x 450 x 50mm ARV4050: 1) True MOSFET car power amplifier 2) RMS power@4ohm: 50W x 4CH 3) Bridge mode power@4ohm: 150W x 2CH 4) THD@4ohm: 95dB 6) Input sensitivity: 0.15 - 6V 7) Frequency response: 20Hz - 40kHz 8) Dimensions (W x L x D): 252 x 260 x 50mm ARV2050: 1) 2CH true MOSFET car power amplifier 2) RMS power@4ohm: 50W x 2CH 3) Bridge mode power@4ohm: 150W x 2CH 4) THD@4ohm: 95dB 6) Input sensitivity: 0.15 - 6V 7) Frequency response: 20Hz - 40kHz 8) Dimensions (W x L x D): 252 x 180 x 50mm ARV2100: 1) True MOSFET car power amplifier 2) RMS power@4ohm: 100W x 2CH 3) Bridge mode power@4ohm: 300W x 1CH 4) THD@4ohm: 95dB 6) Input sensitivity: 0.15 - 6V 7) Frequency response: 20Hz - 40kHz 8) Dimensions (W x L x D): 252 x 260 x 58mm ARV1120: 1) Mono! True MOSFET car power amplifier 2) RMS power@4ohm: 150W x 1CH 3) THD@4ohm: 95dB 5) Input sensitivity: 0.15 - 6V 6) Frequency response: 30Hz - 180kHz 7) Dimensions (W x L x D): 252 x 200 x 50mm Inner packing: Color gift box