I think we need to get a spot early at slamfest see how many ppl are going to be there and rope off some spots for DB unit. Maybe right next to shop 87s spots.
Is the speaker still hooked up to the sub? try unhooking sub and rcas. if it still does not turn on chech the voltage on the positive and the voltage to the remote.
He is right it just takes practice. Go pull some pannels from a junk yard some spray adhesive some tweed and just experiment. oh yeah and lots of razors.
If it is not legal there is an easy solution a rear viev cammera wired to be on when driving. Like the ones in license plate covers and a small screan up front or one of the new screans that are built into the rear view mirror.