I just added a 10 inch Infinity reference sub and a JBL amp to my mach 460, and it sounds great. It now has me wondering if swapping the front tweeters for some aftermarkets would clean up the highs that I want. I read on another mustang forum that the tweeters can be replaced with aftermarkets and it is just a plug and play but I would have to make a bracket to mount them in the 2.5" hole, which is no big deal. Can anyone verify that this is true?