So I built my own portable bluetooth speaker out of an Ammo Can. Its a 50 cal SAW box. It uses a Dayton 50w x 2 channel amp with bluetooth and aux in. Speakers are 4" JL Audio C1. Grills are custom made from computer cooling fan grills. I lined the front and back of the box with 3/4" plywood and then used car sound deadening material to coat the entire inside. Sounds awesome!