My brother in law has them on his offshore fishing catamaran.
They sound good and hold up well.
I have Poly Planer speakers in my saltwater fishing boat and my Chris Craft.
They are tough and sound good, but not as good as the Fusion's.
I have had one pair of Poly Planer's in my offshore fishing Proline for 14 years with no issues.
They get wet, get washed, and still sound the same. Just not as good as the Fusion.
But my brother in law's Fusion radio system is a lot higher cost and output than the Poly Planer.
I have no booster/amp. Just radio and speakers.