I had 5 year old (came out of last boat) Kicker speakers, and 2 year old Kicker tower's decided to upgrade them all w/ Polk DB651's.
here we go:
Bow Before:
after:
Tower befores:
Tower Afters:
Polks in the cab:
sounds similar but polks def pick up the lows ALOT better, they are just a lil bit more clear.