[motornut]

i wired my head unit to the batt,avoided using the ign.wires for power.used small/low power switches, one to turn on/trigger the head unit,crossover,mid and highs amps.second switch turned on the 10 inch subs.i don't know the wire colours (for kenwood)but i have used one switch for stock radios for friends,no key needed to be left in.Newer radio units turn off when the voltage drops to low ,your unit might be turning off and on again,when you start up