As displayed by Ken Blecher at InfoComm 2013 in this exclusive video for FRONT of HOUSE magazine's FOH-TV, Powersoft unveiled its M-Force system, a revolutionary drive system for subwoofers that uses fixed coils and moving magnets (rather than the traditional moving voice coil and stationary magnet structure). Intended for high-performance professional sound reinforcement applications, the technology will be offered to other companies as an OEM system and can be used with various types and materials of woofer cones -- a 30-inch is shown and up to 40-inch is supported.
They have been working on this for 5 years if not longer...Yes the stationary coil moving magnet system is not new by any means. However they are doing some more advanced things in this design that haven't been done to my knowledge. Multiple gaps, magnetic centering, magnetic limiting, etc. I dont think we will see this on anything that isn't a finished system costing VERY big money for quite some time. Hopefully I am wrong.
I dont think we will see this on anything that isn't a finished system costing VERY big money for quite some time.
Chances are it will never be seen on anything smaller than an 18 either. Even if the magnet is a 10oz neo that's a lot of weight added to the MMS of a typical driver. It would have to be insignificant to be worthwhile, thus using it now in a 30 incher. Even then it's going to cost a fair bit of sensitivity, but that's overcome by not having to keep the coil gauge small, allowing a lot more power than a moving coil driver. It looks like they're heat-sinking the coil too, allowing even more juice. As for price, chances are these will be mainly pro-touring sound oriented, where paying $5k and more per sub isn't blinked at, and the space savings offered compared to other options can save in diesel fuel in one season what they pay for the speakers.