Usher does not use Scan speaker drivers, they make their own Usher drivers and thats what they use. It is true that they used to make drop in replacements for some of the more popular scan speak lines, however they have some "advancements" with their symm-motion, etc. In any case, if you look at the model numbers, you will find that they follow the scanspeaker drivers in terms of which ones they are compatible with. There are designers who use some of the Ushers instead of the scanspeaks and havent found much of a difference. Klaus of Odyssey will do this if you buy a base version of the Lorelei. So the same design with Symphonic Line can use a high end driver (forget the brand), or a scan speak, the Odyssey range can use the Scan speak or the Usher drivers. You cant really make out the difference between these two.
@Dr_bass - hearing a scan speak driver and hearing an usher driver (even though they can be used as replacements) is not at all the same when you hear them in different designs - you cant judge anything from that. The hard to drive does not come from the woofer alone, its based on the speaker design, after all if you look at 2 drivers and their characterisitcs measure the same, no reason why one should be harder to drive than the other. Instead, its based on the speaker design as a whole, the size of the inductor coils the amp sees, etc the mini-dancers use the same drivers but are easier to drive.
The relative "compression" that one hears in the Be-718 which is very minimal in the MD-1 version (with the same driver) is not a function of the driver but of the entire design.
As to why Usher went with a DMD, I think this is obvious, if you have followed some of the postings on the net that started about a year back. I also agree that improvements may have been possible to the Be-718 instead of going to the DMD line. However, keep in mind that worldwife the be-718 has been a runaway success, from the company point of view, is there a reason to change it...probably, probably not
@ROC the pricing on the DMD line will not be 30% more, it will be a challenge but we will keep the pricing to a very minimal price rise, lets see....watch this space in a few weeks.
cheers
Sridhar