Merely sick of you completely changing the topic of a thread as soon as someone mentions a db reading. Just numbers bro, no need to go getting your defences up over numbers.
hardly changing the topic, this is still the car audio section...
I was really making a point, that if someone claims some silly high number, it might be better to not listen to their car audio advice...
Circuit breakers are ok, but if Dman is running 0ga cable, you'd want at least a 200amp circuit breaker... I can't recommend one, as all my experiences with them have been bad...
The one I bought from Jaycar was fine, till I tried to use it again, and the stud the cable connected too snapped off...
If you're running a rear battery, it's only going to be a charge wire, so its not too critical, if you want to use circuit breakers, go for it!