Originally Posted by
davef
Yep - we use a shallow slope on the mid crossed to the woofers, and a steep slope on the woofers crossed to this mid. Plus that SVS Ultra tower has (2) mids, that automatically cuts the excursion requirements in half, plus they are larger woofers which increases efficiency - further reducing excursion requirements at the same volume levels.
Pogre, you really can't compare one speaker to another with regard to excursion, unless it is a subwoofer with the same size woofer and similar tuning, similar filtering and EQ. It gets complicated. Our Towers were not designed as SPL beasts but I have run ours in our demo room at 110dB for hours at a time, at a listening distance of about - 9 feet in a very well damped room. We have had customers turn up the volume to insane levels at times, often prompting me in the factory area to knock on the door and ask them to turn it down a bit. We have had these same towers in our demo room, which have been seriously abused and with many thousands of hours of listening time on them for close to ten years now. We have yet to have to swap out a woofer or the RAAL 70-20xr. In fact, I believe in an early demo of the towers - I believe Curtis and some other people accidentally bottomed the hell out of the woofers when Mike (I believe it might have been Mike but I could be wrong) played an insane Linkin Park track, full range at about 110dB.