l have an alpine pdx 1.1000 amp and an alpine type x subwoofer, both were working before l disconnected the batter. (the reason for disconnecting the battery was to install a CAl if that matters.) after the install, the subwoofers stopped working, l also have an alpine iva-w205 nav system, but l checked all the settings and put them back to the settings they were at before. anyone have any idea what the problem could be?

Did you reconnect the power wire that goes to your amp? Also, check your fuse. And are you running a cap?

l would check your inline power fuse first.

Good Luck!!!

when messing with your battery you should always take out your power wire fuse that could be what happened you prolly blew the fuse