Hey guys, lemme shine a bit of light on this design...
It a rather basic dual coil / gap woofer....
instead of most drivers, which ultilize a motor topography which direct flux into the pole / topplate where a single coil is centered, this driver has a rather lossy flux field, which is directed into what could be considerd dual topplates.. in each, a coil is centered...
here's a pic I made up...
advantages to this design? none actually...
instead of having one well focused flux field... you're trying to make two, and there doesn't appear to be enough metal in that motor to do it sucessfully..
it is a quad terminal woofer, which will cause a higher mms over a single coil.. of course the former is going to be twice as long now too..
no gain in excursion, or efficiency.. although the dual altered spiders will control deflection some, if the former wasn't that long, it wouldn't be needed..
also worth noting that the flux losses from that style motor wouldn't be pretty at all..
these designs pop up at CES every year.... its basically a show off style woofer, that has no usuable advantage over a common single gap woofer.. The suppliers are simply looking to attract business by saying.. look at this..
I go up, push around on it... wave to the nice people behind the boothe, and walk on
Loyd L.
Hey guys, lemme shine a bit of light on this design...
It a rather basic dual coil / gap woofer....
instead of most drivers, which ultilize a motor topography which direct flux into the pole / topplate where a single coil is centered, this driver has a rather lossy flux field, which is directed into what could be considerd dual topplates.. in each, a coil is centered...
here's a pic I made up...
[img]http://www.frontiernet.net/~bigbassman/Dual%20Coil%20Gap%20Motor.JPG[/img]
advantages to this design? none actually...
instead of having one well focused flux field... you're trying to make two, and there doesn't appear to be enough metal in that motor to do it sucessfully..
it is a quad terminal woofer, which will cause a higher mms over a single coil.. of course the former is going to be twice as long now too..
no gain in excursion, or efficiency.. although the dual altered spiders will control deflection some, if the former wasn't that long, it wouldn't be needed..
also worth noting that the flux losses from that style motor wouldn't be pretty at all..
these designs pop up at CES every year.... its basically a show off style woofer, that has no usuable advantage over a common single gap woofer.. The suppliers are simply looking to attract business by saying.. look at this..
I go up, push around on it... wave to the nice people behind the boothe, and walk on
Loyd L.