i have two in mine under the rear seat...i believe they are panasonic 10's. they were in there when i got the boat but not hooked up.
i now have an amp dedicated to them and another amp for mids / highs.
this is the only pic i have and after i pulled it i remembered there are two 5" or 6" mids under there, too. it sounds good inside the boat but definitely wont rattle any drums outside of the boat.
it's for sale now but i dont have it listed on here yet.