PCO6 - I get it, all that work and effort to craft something awesome and she prefers the off the shelf trailer. Brutal, but I get it.
Yeah, the audio is terrible. I'll have to do my research and find the best speakers for the application. The mounting depth is very shallow so the upgrade may not have a tremendous amount of impact. The big impact is having audio outside. I had a 1976 Jaco Jay Cardinal that I did audio in. I had a pair of speakers inside, similar to the Clipper but I added a pair of Kenwood 6x9 in carpeted boxes that I stored in the cargo area. I had them on 20 feet of speaker wire so I could either open the cargo area and point them out or pull them way out and aim them. The best part was with them playing while locked up in the storage area they added a ton of bass to the interior. I'd have to fade them to the interior speakers only at night to be sure not disturb other sites.
Back to the Clipper. I added magnetic door hold opens. One for the storage pass through and one on the entry door. What a difference.