I've got four 6x9 kenwoods, one on top of each rear fenderwell and one between each fenderwell and door like pinenuts....the PO put them in these lacations and installed them in wood boxes with outdoor carpet wrapped around the boxes, looks nice, but the wood absorbs a lot of water and mud since I run without doors and just a full bikini top. Sometime soon I will be making some fiberglass boxes and then will just gel coat the boxes for more of an outdoor type environment protection.
Rob