unexplained loss of spl

same vehicle, same alternator, same amp, same woofer, same box, same wire, same locations, same battery.   im starting to think i just need a total overhaul.  thanks everybody for your input. im not too worried about it because my system is more about sound quality anyway but i guess im not entering it into any more competitions

id rather buy a new sub than re-cone it.  and i didn't mean i was going to buy a whole new system, i just need to fix all of the small problems that i was always just too lazy to address. i know i have always had a voltage drop when i really turn the sub up so i need to do the big three and maybe get a new alternator, check my grounds to make sure they are still good, just minor stuff like that should get me at leats back into the high 140's