You stated the Kenwood 768 is a 200 watt unit. Crutchfield says :
built-in MOSFET amplifier (22 watts RMS/50 peak x 4 channels)
So you are figuring the 50 peak times 4 ?
I'm not sure that means peak watts per channel, or total of 50 peak watts for all 4 channels combined.
I find it hard to believe that a 200 watt device can function on a 15 amp fuse ....... ( 15 amps X 12 volts = 180 watts )
Mark ?