I just installed a complete system in my 28 footer (finished last night to be exact)
I ended up putting 6.5" pioneer car speakers in the foot of a storage
compartment. I cut the holes out with a saber saw (jig saw) for flush mounting. Once the lid was on the compartment and the cushions
replaced, the amount of bass was far more then I could have hoped for.
P.S. I put Alpine M600 6.5" Marine
speakers in the cockpit
and they also sounded far better than I would have thought for outside.
Sublime sounded great with my boat still on the cradle
"Lifes too short, so love the one ya got
Cause you might get runover or you might get shot"
R.I.P. Bradley Nowell