MBM4.24V – 4-Channel Digital Amplifier – Ultra-Compact Design – Cinch & balanced Speaker Inputs – 400 Watt RMS/800 Watt max. – 24 Volt Operating Voltage for Truck/Bus/RV – Illuminated AMPIRE Logo Specification: Power Supply Power supply voltage: 20 – 32 VDC Remote voltage: 8 – 28 VDC Idling current: 0, 51A Idling current when off: 0, 4mA Amplifier Stage Output power (RMS) @ 28, 8V / 4 Ohm: 70 Watt x 4 Output power (RMS) @ 28, 8V / 2 Ohm: 100 Watt x 4 Output power (RMS) @ 28, 8V / 4 Ohm: 200 Watt x 2 (bridged) Output power (max.) @ 28, 8V / 4 Ohm: 140 Watt x 4 Output power (max.) @ 28, 8V / 2 Ohm: 200 Watt x 4 Output power (max.) @ 28, 8V / 4 Ohm: 400 Watt x 2 (bridged) Distortion (THD): 0, 5% S/N Ratio: 90dB Channel separation: 65dB Input sensitivity: 200mV – 6, 0V Filters Low pass filter/slope: 50Hz – 250Hz / 12dB High pass filter/slope: 50Hz – 250Hz / 12dB Bass Boost/Frequency: 0 – 12dB @ 50Hz Subsonic Filter: 25Hz. Other Functions Fuse: 20A x 1 Max size (LxWxH): 251 x 141 x 50mm Weight: 1, 85Kg Inputs: RCA x4, High Level x4 (High Level Auto Turn On) Special version for use in buses, trucks and recreational vehicles with 24 volt power supply..