You're probably not going to get great sound quality just by switching mounting devices. I would recommend you pick up some sound deadening and seal off your doors, or at least put some behind the speaker. That will give you much better midbass response. I would also recommend, if you have the tools, fabricate a better mounting bracket... it seems to me you kind of ghetto rigged them to stay in there. Just get some mdf and make some mounting rings... there are numerous diy sites that show how to do it.