I prefer the
tuffy lockboxes These fit standard 6"ers and it adds a place to store stuff. I'm using these with infinty speakers. But whatever you use, and I say this all the time, make sure that it's secured tightly. Use lockwashers and make sure you put something between the speaker box and the metal of the wheel well. The place that did mine, when someone else owned the Jeep, only used a strip of weather stripping. I took them off and used some thin foam like drawer or cabinet liner. [addsig]