Cutting a hole in boat?

A jig saw with a fine tooth metal blade and tape the area on top and cut through the tape. Plus check the panel where you want to mount it for:1. obstacles behind the panel like wiring harness and tubing or items mounted behind the deck, 2. as well as clearance. 3. routing of wires 4. access for the speaker install5. go slow

MEASURE TWICE CUT ONCE !!First hole is the hardest (mentally)After that, its easy

I recommed YOU do it yourself vs letting a FRIEND help.*This leads into another shame story*A few years ago a good friend of mine, Bill Leroy, was helping his buddy John work on Johns jet boat. Bill had a circular saw and was cutting the wood floor out.This boat had a bow mounted tank and we were moving it to the rear. Metal flake orange Glastron. I dont remember the model but it was pretty rare. No factory windshield. Hugh big block and Berkley jet.We were sitting in lawn chairs in Johns shop talking motorcycles eating chicken, not paying attention to what Bill was doing.The saw stops, Bill pops his head up with trash hanging on his glasses and a big smile on his face.Thats when John dropped his chicken, jump out of his chair running toward his boat with panic in his voice; ” ARE YOU SUPPOSED TO SEE DAYLIGHT THERE ?? ” Yep, Thats right, Bill cut clear thru the hull, all the way down the side.Beware of helpers.