Look carefully at a brochure
I looked very carefully at the Catalina brochure and installed similar speakers in the same locations as shown.It was very handy that the factory installed the wiring to each location - especially up through the aft stainless tubing to the underseat location.I used the NavPod SP100 speakers (see link) for under the seats - from Dave's Marine (www.brokenlegdave.com) and paid about half what Catalina or Ocean wanted. These mount very nicely under the seats and work fabulous. I did drill a small drain hole in each so that if any water did enter the "pod" enclosure - and it will - that it had a place to drain. The actual speaker (Polyplanar - and included in the SP100 package) is waterproof.Inside, I used Polyplanar 6x9 box speakers on a gimbal bracket mount. Again, from Dave's. I put the port side speaker on the aft side of the shower bulkhead. The material was not quite what I expected - I drilled pilot holes and then had a heck of a time running screws into it. It seemed to be a thin wood veneer and then a thick glass/resin - maybe the pilot holes should have been closer to the screw size. Anyway, the attachment is firm and the wires are right there.Starboard side, I mounted the other speaker on the Fwd face of the Galley cabinet - again, the wires are stowed right there and the brochure shows the speakers installed in these locations.I bought a hardwired remote system AM/FM/CD system from Clarion (via Boaters World on the internet). I haven't yet installed the remote out to the console, but the wire run should be straightforward - once I get the guts to open up the Edson pedestal/instrument panel and figure out where to drill the 2" hole, and how to route the cable down from the panel through the pedestal. Looks like there should be plenty of room inside the diamond pedestal, but I won't know 'till I look.Tim"April IV" C350 #68Seattle