Magico's Q5 loudspeaker is composed entirely of one-half inch thick aluminum, and while the speaker isn't very larga as high-end floor-standers go, each one weighs 400 lbs. There are two 9" woofers, one 9" mid-woofer, one 6A" midrange, and a beryllium tweeter. The latter is new for a for Magico; the other drivers are similar in design to the drivers in other Magico speakers. $54,000 a pair, if you have to ask! For five channels, that's...never mind.