Ultra rare!!! Very little information on the internet. They are huge. 4-way, 18" woofers. As you can see, the cabinets are made in two parts. The bottom is only for 18" woofer. They are loud like hell. Dimensions: 39"H x 20"W x 11.5"D. Will consider trades for vintage stereo stuff, like turntables (old Dual, Thorens, Garrard, etc.), vintage speakers, amps, preamps, etc. -working or not! Also willing to buy high quality vintage stereo stuff, including tube gear.