I'm having a little problem. When I installed my amplifier, I could never find a fuse that turns off when my ignition isen't on. I went to my fuse block by the engine and tried every spot almost (accesory, wipers, radio, etc.). I was forced to put a fused switch that I hate. I have to turn the system on and off with it, and sometimes I forget to turn it off. Is there any other spot I can put it without taking out my HU so it turns off with my ignition?
Did you try the fuse for your radio? it should turn off when the ignition is off. And that fuse is usually (but not always) inside the car somewhere, not by the engine.