VIFA P21WO-20-08

I personally chose this driver because I own and have listened long to the P13WH woofer, with the same cone and resultant smoothness. I have to say that all of the vifa mineral-filled poly. drivers are "timbre-matched" and therefore suitable for home-theater use together. This is important in the design since I will be designing a center speaker for movies. It will use the P17SJ woofers and Morel DMS-30 tweeter in a horizontal D'Appoltio arrangement. Now I have long been told that for midrange, drivers 6.5" or less should be used. I have always asked myself why. I know that midrange dispersion becomes an issue in larger drivers. Example, I'm using the P21WO up to it's 30 degree roll-off point in this design. However, I personally feel that with a stiff enough cone, an eight-inch driver is fine. Pro systems routinely use 8,12 and even 15" cones for midrange why? because they need not move far to produce astounding volumes in the midrange frequencies. So, I see this choice as a trade off, more cone-breakup but since the 8" woofer does not move as far, it will have better IM distortion figures. Trading FM for IM I guess? Anyway, both should be lower at any given volume since less cone motion is needed. (maybe IM will be higher, but not significantly over a 6.5" driver anyway.)