Join Date: Aug 2008
Location: OC NJ
Thanked 9 Times in 9 Posts
Rep Power: 9
I can think of two.
1. It introduces new equipment and potential failures for your VHF comms.
2. It would probably be annoying as hell to have your music interrupted!
I'm no expert, but one concern I've read about cockpit speakers is that they are big holes in the watertight integrity of your boat (depending on the type). Depending where you sail this could be an issue, i.e. a blue water cruiser wouldn't want them, but it wouldn't matter to a lake sailor.