THey have small speakers for an IPOD if memory serves.
Put those bad boys on the spreaders and point downward, or put them on the boom pointing rearward...
That wouldnt produce enough sound to hear. I used to carry a boom box in a gear bag on the tramp, but even at max volume it was hard to hear when going over 7 knots and impossible on the wire. I currently have waterproof ipod case and earplugs, but it is a bit of a hastle with the wires around my arms and face.. plus i worry about not hearing other boats...