speaker

After 20 years of inadvertant foot contact, my plastic speaker covers (under the helm seat) are starting to look ugly. I'd like to replace these grills over 6 ½ inch Jessen speakers, I have already checked auto-audio stores, auto catalogues, the internet, and even my local West Marine dealer...

My 1988 E28 has two sets of loose ended speaker wire, originating at the straboard electrical panel. One pair terminates starboard behind the cupboard in the head, and the second terminates port in the clothes locker. Is this a part of the Ericson original installation? I've tried to trace...