I have experience with VMPS Subwoofers and the new modern massive 40lb high excursion motors, but have not married the two together. I am really impressed and happy with the modern drivers in a SVS SB-4000 subwoofer I recently purchased. That said, if I did not require another subwoofer I would have stuck with my VMPS Sub in the my home theater environment. It worked well enough for the application. Brian did an exceptional job on his subs with large enclosures, and passive driver to smooth out edges. So he got a lot of performance and refinement out of a moderately priced driver. The newer large motor dives deep, effortlessly, and sounds exceptionally natural. Definitely goes lower than VMPS with no break up at high SPL’s, so ideal for home theater. So my experience with modern drivers is very positive, but it is in a subwoofer designed for its use. I would not foresee any integration issues, and one would expect deeper more controlled lowest frequencies, but you will not really know until you do it.
If you go for it, please post how it comes out. I have two VMPS subwoofers I use in my two channel setup (require two due to low end limits of VMPS RM-V60 speakers) and would consider upgrading to the large motor driver. Really never thought about it until you posted so thanks.
