My wife's convertible came from the factory with the mach 460 system. Previous owner replaced the head unit and front speakers but left the rest. I upgraded the stereo properly with amps, speakers and a sub. I replaced the mach speakers in the rear Mach 460 speaker boxes with some aftermarket 6.5" speakers. I have another vert parts car that is not a mach 460 car and it has 4x6's mounted on a metal bracket where the box goes. Has someone swapped between the two styles. If so, which one sounds better? Just curious.