Yo. Got it started. Typical UTV radio install but I thought I would post my progress in case anyone was interested. Kind of slow going since I was playing PIG with my kids so I only worked in between shots
Ran the wire up the roll bar. Was going to fish through the bar but the 4 conductor heavy duty wire I am using is too thick for that. Some velco straps and wire loom made it look better
Found a neat little rugged 2 channel amp. The amp simply receives bluetooth and powers speakers. Its super rugged looking. 100 bucks shipped.
Ran power and ground to battery. That was a quick run. Put the power and ground through vinyl tubing like Yamaha does.
Here is the 4 conductor automotive wire I am using for the speakers. Probably overkill but I won't have to worry about rocks or branches screwing it up.
Ran the speaker wire down through where the roll bar goes through the hood panel and zip tied it behind the frame right above the glove box.
Soldered and heat shrinked the connections. I also taped them afterwords. The amp will be in the dash cubby behind a switch panel I am making. The amp power and switched power are both wired to a switch as to not introduce any battery draw when not running.
Some wake board speakers mounted by each persons head should be loud enough.