Originally posted by futureownerSVT:
OK I'll take the bait from the peanut gallery...

"a fountain of mis-information" is comical... lets look at why an oval speaker cannot move in a truely linear fashion:

the voice coil on all tradional dynamic(cone) speakers is round. in a mid-range/high frequency application, the actual xmax (movement one way forward or back) is very small (high frequnecy "hZ").. so the actual time inside the magnetic gap where the electrical transfer occurs is very short & very fast. Any miss-alignment or off kilter situation will dramatically affect/effect both electrical transfer...Compared to a Subwoofer where the time in the gap is longer (lower frequency "hZ")

the oval cone & surround (so wonderfully called a "rubber ring by the experts here) cannot move in a linear fashion. the outer edges (at the pointsof the oval) will peakthe surround well befor the sides closested the center of the driver/cone which travel more closely to the round voice coil...

oh hell who cares... My Engineering degree, MECP certification, & 20+ years in the business are worthless...

Enjoy your land based Satelite radios & your 6x9's.. oh & the fart cans rock too...

Rob W




i find it interesting that your initial post stated that it was actually low frequency repsonse that necessitated a round driver for best accuracy, yet in this post, you now change that stance to mid/high freq. apps as being that case. i'd be interested if you could explain to us how, given the same amount of surround material around the entire cone surface, an oval design, as those used in a 6x9 application, will run out of excursion at the "corners" before any other areas. even if this was the case, it would do so at all corners, and as such, would retain VC alignment. thus it would only limit spl output, which would be nominal at best.

the only possible argument that i can see as being plausibly for this "round is better" argument is that the actual response time from voice coil excitement to cone movement at the futher points on the cone may be slower than those at the closer points. but in this small of an application (the difference being what, 1 1/2"?) and a reasonably rigid cone (as most current quality drivers enjoy), this difference is not only negligible, it's completely inaudible.

i'm not sure how land based satellite repeaters factor into this concept, nor tuner-style exhausts for that matter. i'd dare say your attempts at ad-hominem/circumstantial attacks may be malicious. if you are, in fact, leaving us here in the audio section of ceg (as your other post in the satellite thread implied) then i wish you luck in your endeavors. and if you intend to purport nonsense about non-round shaped speakers, you may want to know that there is a national champion sq vehicle that uses non-round drivers in it (hint... he's a member here at ceg, and i remember it was either granger or eldridge who was using boston acoustics 5x7 components in his escape as well) for whatever that's worth....

good day.

02 Mustang GT... Tuned by Nelsons. Low 12's, anyone? .....______ ___|______\_____ |/-\_________/-\_| .\_/...............\_/