We got my wife a new Infiniti QX50. It has an 11 speaker Bose stereo. It really sounds pretty good. I do realize it probably has amps and subs somewhere. If my boat would sound half as good as her car, I would be satisfied.

I know Im gonna get a bunch of crap for this , but , we use West Marine Pro Series house brand waterproof speakers on our commercial boats. They blast music all day ,get soaped and hosed every evening and hardly ever give up. We run them with H/P head units and they actually sound much better than you would expect ( most West Marine Stores have a test display ). Best thing is , being house brand , walk in and exchange for three years without extended warranty , no questions asked ( I dont even bring a receipt , they just look up my name ) Good Luck!!!

It won't. The car is a much more controlled closed environment. And yes there is a amp with a lot of DSP in it.

I don't know what dsp is.

https://loz.craigslist.org/bpo/5480601269.html

Lol Sorry
Digital sound processing.

Let's just say there has been a lot of time spent making that car system sound right.

Do you spend enough time in the cabin to warrant replacing them? I'm reasonably skilled in that stuff if you need a hand locally. Ask Jonsey also if you know him.