so today the fuse on my amp melted so i decided to replace my sub and amp for something new. got myself a fli active 12 (1000w) which is pre amped ,after fitting i turned ignition on and i heard a loud pop when the stereo powers up from the speakers and i have no sound coming from the front but still have sound coming from rear speakers speakers i unplugged amp and box and still the same ,do you think its the head thats gone or speakers blown ? or a component within the head unit ? either way its hacking me off now

im in the process of testing with a different head unit to determine the cause of the problem ..

Thanks any help gratefully recieved