Why not upgrade to the MX with the super-BAM? It is true that the bass will not go any lower, the cutoff/filter/whatever is still at the same frequency, but the MX with the Super-BAM produces much more, and much better bass, than the old Milleniums with the old BAM. If you listen to pipe organ music or electronica or anything with 20 cycle bass, then going to the MX won't work, but otherwise it will be an improvement. In my room, with my system, it almost sounds like there IS a well-integrated sub in the system. Bass weight, clarity, and articulation improved dramatically with the MX ( i had the Milleniums too before going to the MX) and even more so with the super-BAM.
Again, though, if what you're looking for is LOWER bass than 28 cycles, you'd have to go elsewhere.
Again, though, if what you're looking for is LOWER bass than 28 cycles, you'd have to go elsewhere.