Specifications: ARE4070: - 4 Channel True MOSFET Car Power Amplifier - RMS Power @ 4ohm: 70W x 4CH - Bridged Power @ 4ohm: 200W x 2CH - THD @ 4ohm: <0.5% - S/N (A-weighted): >90dB - Input Sensitivity: 0.25 - 6V - Frequence Response: 20Hz - 40kHz - Low Pass Frequence: 30 - 180Hz - Bass Boost: 0 - 6dB - Dimension: 300(W)x260(L)x58(D)mm ARE4.1: 5 Channel (4.1) MOSFET Car Power Amplifier RMS Power @ 4ohm: 70W x 4CH + 230W x 1CH Bridged Power @ 4ohm: 200W x 2CH + 230W x1CH THD @ 4ohm: <0.5% S/N (A-weighted): >90dB Input Sensitivity: 0.25 - 6V Frequence Response: 20Hz - 40kHz Dimension (WxLxD): 300x400x58mm ARE5.1: 6 Channel (5.1CH) True Mosfet Car Power Amplifier RMS Power @ 4ohm: 70W x 4CH + 70W(Center) + 230W(Sub) Bridged Power @ 4ohm: 200 x 2CH + 70W(Center) + 230W(Sub) THD @ 4ohm: <0.5% S/N (A-weighted): >90dB Input Sensitivity: 0.25 - 6V Frequence Response: 20Hz - 40kHz Dimension(WxLxD): 300x450x58mm