Congratulations on your new boat. Lots of post and threads about upgrading stereo equipment, changing and/or adding speakers, etc... Do a search in the upper right hand corner of the page. Play around with the wording of your search request. There is a lot of information and discusison threads that will be great starting points. I don’t know the electronic stereo stuff, or I’d offer more concret ideas or advice.We have an sx22 and was looking at adding 2-3 more speakers. Has anyone done this?