After looking at it i think you could take the subwoofer out of the bracket and install a 4x6 not in the same area but right where the hole is behind the grill. sure its not ment to go there but it would make a nice encloser for it and would mount in the right location. only problem i see is you might have to cover the hole with carpet since 4x6 normally do not come with grills. or at least kickers dont and i hate mis matching speaker brands