We have the original Audiovox AM/FM/cassette player in our TT. The opening in the overhead cabinet is 14-5/8" x 4-1/2", which is huge. If we were to replace it with a radio/CD/DVD player, what should ...
A common RV industry sound system is this manufacturer. It's also a vertical mount type of system, meaning, the depth of the unit is shallow. By using this type, you will gain space inside the cabinet area. Pretty much any thing you decide on will require some custom face plate creativity, as indicated by the dimensions you've given. Home Depot / Lowes does have everything you'll need.