I've got the bigger Yamaha outdoor speakers on the yacht. One pair on the deck, one pair down below. I bought them because they didn't take much power to drive and put out better bass than the smaller speakers. The only caveat is that they have a little bass "hump" somewhere just below a bass voice. You have to eq it out or they sound a little boomy. The upside is that if you eq it out they sound very very good. We tend to range Stan Kenton, AC/DC, Willie/Waylon so it's a mighty mixed bag and the speakers really never disappoint. They easily drown out the diesel, wind, waves, and an occassional angry tugboat pilot honking at., could it be us?

They'd make wonderful pool speakers and Fry's and Best Buy often have them on sale for $99/pair. Plus you can say "Someone from the yacht club recommended them to me, Pip Pip!"

Link to said speakers at Amazon