Nice looking loudspeakers. I have used MB Quart 25mm and 20mm titanium tweeters in my DIY projects in the past. Excellent manufacturer.
A snippet from audioholics..........
"All In-Room Alexxa's are offered in three different cabinet finishes;
Cherry Maple, Satin Black, and Piano-Finish White. MB Quart's top-line
floor standing tower model, the S-One, is $899.95 each MSRP. The matching
Alexxa center-channel loudspeaker, the C-One, is $599.95 MSRP. The Alexxa
Series small bookshelf-sized effects speaker, model B-One, has an MSRP of
"Adding to the German engineered and designed new Alexxa product line-up
are two powered subwoofer systems. The largest, the SW-12 is a 12-inch
acoustical suspension design, powered by a 350-WRMS integral amplifier,
while the 10-inch version the SW-10 is powered by an integral 250-Watt RMS
amplifier. The SW-12 powered subwoofer has an MSRP of $999.95 and the
SW-10 retails for $899.95 MSRP."
Those are some reasonable prices.