Kenwood KAC-M1814 Compact 4ch AmplifierKenwood KAC M1814 Compact 4ch Amplifier Features: Compact 4 Channel Digital Amplifier MAX Power: 400W RMS Power: 45W x 4 4 RMS Power: 45W x 4 2 RMS Power: 90W x 2 Bridged RCA Inputs with Gain Control Speaker Level Inputs RCA Signal Sensing Turn On Conformal Coated 2 Ohm Capable Bridgeable S N Ratio: 95dB into 4 at 14. 4V Variable Selectable HPF LPF High Level Input Sensitivity: 4V 12V Low Level Input Sensitivity: 200mV 5V 145mm x 45mm x 100mm Compact