RATED VOLTAGE: 10-16 DVC BIGGEST CURRENT: 13 A OUTPUT IMPEDANLE: 150W/6 Ohm AUDIO FREQUENCY: 675Hz - 1633Hz AUDIO OUTPUT: 50WATTS 13.6VDC OUTPUT POWER: 150WATTS RMS MAX (15.0 VDC - SINGLE 150W SPEAKER) POLARITY: NEGATIVE GROUND POLARITY PROTECTION: DIODE/FUSE used in fitting together with the warning light