Green Mountain Audio Calypso Floorstanding Speakers - SWEET!

The Calypso is constructed of Q-stone; a composite concoction of fine marble dust suspended in a polymer that results in a speaker cabinet with a very low Q i.e. a material's tendency to vibrate. As with all GMA loudspeakers, the Calypso is a time-coherent design. In conjunction with a 1st order crossover, the unusual cabinet shape time-aligns the acoustic center of each driver to produce a coherent waveform i.e. the output of each driver will reach the listener's ear simultaneously and not staggered across time as with other multi-driver speaker designs.

GMA designer Roy Johnson fired me off a brief technical description: 
"The Calypso uses an 8-inch woofer with a cone made of non-woven Nomex fibers and a cast-aluminum frame having an aerodynamic profile. The woofer's suspension has unusually high compliance, using a thin synthetic SBR rubber surround and a fully-vented, large-diameter flat spider. For low distortion, shorting rings surround the vented 33mm-diameter Kapton voice coil." 
 
"The midrange driver is a 4.5-inch unit with a sandwich-cone of epoxy-laminated Kevlar skins over a honeycomb core of Nomex, and has a carbon-fiber/ABS chassis with a vented, high-power voice coil. This driver is mounted into a Q-Stone enclosure of multiple layers, inside of which lies an 18-inch long, felt-and-fiberglass labyrinth."
 
"The tweeter is a compact double-neodymium-magnet design made in the USA. It has a 28mm linen dome, hand-coated with polymer and backed with a large rear chamber. The voice coil is wound with hex-profile copper-clad aluminum wire onto a high-strength aluminum-alloy former. It is ferrofluid-cooled with a moving mass of just 0.46 grams. The unit is encased in a cast marble chamber and mechanically damped. Under the grille foam, small strips of wool felt are embedded in the Q-Stone to prevent diffraction from the edges of its enclosure and to cast an acoustic shadow down onto the mid driver and woofer." 
 
"The crossovers are, of course, 1st-order designs electrically and acoustically, at 350 and 3000Hz. Sensitivity is 89dB and impedance is 4.75 Ohms, +/- 0.75 Ohms, from 150Hz to 20 kHz. Phase shift is +/- 2 degrees from 200Hz to 8 kHz. The Calypso is 51 inches high and 11.25 inches square on the column. The base itself is 13.5 inches square. Due to Q-Stone's density, a Calypso weighs in at 110 lbs. The outer finish is a black Texture-Kote with solid-hardwood panels providing additional damping. The wood finish is a hand-dyed lacquered cherry. Speaker cable connection is via a pair of direct-gold-plated, oxygen-free copper binding posts on the bottom of the cabinet. Four adjustable point cone feet are included." 
 
MSRP: $11,995 / pr Condition is excellent!  The grills are not pictured but are included. I don't care for them, so I don't use them. The Calypso HD's are now $14,999/pr!

Pick up in San Diego preferred. If you want them shipped, I can have custom crates made at buyers expense.