On my bayliner, I have 2 crappy 5-1/4 speaker that are only like for real 4" inside. Only 8 watts and sound so bad, a stadiums PA system would sound better.
So on my boat the holes cut from the factory are like 4-1/4 or so. I want to cut them, bigger so I can put 6-1/2 in there, but I cannot...