I love car stereo. I'm sure I can adapt it to boats. I can make it sound (almost)like you are at a classical concert, using minimal speakers. I can also integrate computers and monitors into mobile applications, such as boats. I've done it with RVs and cars already.
The key is to place the speakers perfectly and also to aim them perfectly. Yes it truly is an art, and I've been doing it for 20 years. From there, I tune the equalizer and adjust the gains and crossover points. I am a stickler for good sound, even when using not so good equipment; I can make it good and interesting to listen to!