I just received the center channel that matches my Legacy Focus SE L/R Speakers. It mentions "speed" in their advertising also. Here’s part of their Ad
Legacy’s best center channel speaker has been updated to the Marquis XD. Featuring our 4" AMT ribbon, as found in the Legacy Dual Air Motion Tweeter system, and the 8" Italian crafted titanium encrusted midrange as utilized in the Aeris system, Marquis XD is on par with the speed of our best towers. These high precision drivers, a new crossover, and the incredible dual 12" ultra-linear bass drivers with 15 lb motors make it the best center speaker at any price. The dual 12" woofers of the Marquis XD deliver uprecedented linear output with snap and definition with rich upper bass and clean transition to the lower midrange.
Marquis XD can be placed above or below a 60” monitor, or behind a perforated projection screen in your home theater.