All large diameter full range drivers are going to have less than ideal response off axis, even whizzer cone and phase plug equipped models. Most designs show a rising response on axis which when averaged with 15 and 30 degrees off, becomes a fairly flat response. I commend Dayton for at least having the guts to publish off axis charts. I can only say that in my experience, Dayton's measurements are very accurate.
Cone material by itself has little to do with a speakers performance. It's the implementation of the material inot the overall design that matters most. Each material has a characteristic, nothing more.
A full range driver with accurate measurments showing off axis performance and PUBLISHED Klippel tests. Sounds like the dealer is showing the deck here instead of flipping the turn card AFTER you've paid for it......and that's a gamble. As for most of the fullrange summations and designs i've seen posted about, little to none have any measurements to back up the subjective rants that often follow.
Looking in from the multi-way side of things, it often appears that the Fullrange crowd is claiming some kind of 'Magic' in these designs cluded in mystery that must be 'heard' to understand. Why is that? Why can't i and others 'see' these claims in electro-analysis. Is there some secret property these drivers and designs exhibit that can't be measured. Are there Z particles at work here?
No, of course not. Anything shrowded in mystery is usually presented that way as it defies the scientific results and what we physically know about the propogation of sound waves.
To the fullrange guys.....you've been shown a driver with a full measurement analysis instead of smoke and mirrors. Instead of hiding the MoJo of fullrangers behind a blanket of subjective listening properties, make us multi way guys believe!...show us the measurements that these designs are that special. By looking at the Dayton data, there's room for a great design there......as much as ANY of the other, more em.....established fullrange drivers.
As an outsider, the tone of the thread was reminiscent of a playground of neighborhood kids wondering if the new kid should be allowed to play instead of CAN he play. Certainly the Dayton can play, the measurements speak to that just as a major league pitcher's stats speak for his ability.....Unless their's 'magic' rules in fullrange sports?