my amplifier seems to have trouble turning on. i turn the key for radio and the amp doesnt turn on, if i turn on my engine it will start sometimes and other times start driving or rev my engine and itll turn on. is this a problem with batt, alt, or just a cold start problem? also when i drive it goes out sometimes and i hear a really loud pop every time it does. the built in fan is always on in the amp btw. amp is a 1000watt cadence w/ a fi q.