Originally Posted by
MLA
Kicker's KXM800.5 Class-D marine amp is only a little more then its automotive counterpart, then KX800.5. Even a marine electronics can go up in smoke due to direct water intrusion, so where its installed is key.
Subs - You'll find many "automotive" subs that have a composite cone and rubber surround. With the sub located under the helm, direct sunlight is minimal, so a high level of UV inhibitors is not has crucial as it is with a tower or in-boat speaker. If using a ported enclosure, then look for a sub with an aluminum or composite basket over a stamped/painted steel.
So, is marine a must....no, but it can offer some advantages from one install to the next.