Have you tried this Bluetooth Outdoor Speaker w/LED Light

With all due respect to the OP and I am sure they are nice folks, but in my view ALL forms of outdoor speakers on RV's should be banned, torn off the wall, made dysfunctional or otherwise destroyed.

The LAST thing I want to do at a campground or RV PARK (or even a WalMart)is listen to your choice of music. Generally speaking if you can hear it your neighbors can hear it.