Originally Posted by Pikey Dave
Even inside a "dry" cabin, they are still in the marine environment & will rot like buggery if they aren't up to the job. I'd still use proper marine speakers even inside.
Maybe aye, maybe no... I've used car accessory speakers and they've been there since 2003 and still fine. The two larger ones are Sony and the front smaller ones are Aiwa. I suspect any reasonable quality ones will be fine. It'll mostly depend where and how they will be mounted then you can choose a suitable size. However, underway, what with the sizzle of the water and the roaring of the motor, you do require a lot of volume and, for me, that total noise level quickly becomes tiring. A good sound when you're relaxing is very worth having though.