I pressume it's the Unifield Model 1 from VSA :
MAIN DRIVER:
The 7” TPX cone was developed by the British Broadcast Corporation (BBC) for use in their radio and television broadcast studios. This cone has exceptional clarity in both the deep bass area and the midrange frequency band where clarity of the vocal range is paramount. The 7” TPX woofer is loaded into a triple chamber transmission line for extremely tight bass and fast transient response.
COAXIAL TWEETER MOUNTING
In order for the bass, midrange, and treble sound waves to arrive at the ear in a synchronized and coherent pattern, we placed the tweeter in the center of the bass/midrange unit. The 1” coated fabric tweeter uses a Low Distortion Neodymium Motor with advanced engineering features to provide world-class clarity and detail, without harshness or blurring of conventional dome tweeters.
TRIPLE-WALL CABINET
To eliminate the coloration of conventional wood cabinets, we have designed a laminated wall structure consisting of a molded resin/wood powder exterior, an artificial stone inner liner, and a rubberized felt damping barrier. These three materials, 75mm thick, have opposing "Q" factors, which cancel each other’s resonant patterns, enabling the UniField Model One to sound “cabinet-less.” In fact, this Triple-Wall laminate will outperform 5” thick plywood or MDF.
SPECIFICATIONS
Bass / Midrange: 170mm TPX polycone, made in Norway, licensed by the BBC. Tweeter: 25mm silk dome, mounted inside of the midrange, licensed by the BBC. Crossover: Global Axis Integration network with 180-degree dispersion @ 2kHz. Frequency Response: 40Hz to 25kHz +/- 2dB; (bass roll-off -6dB @ 32Hz). Impedance: 8 ohms nominal (5 ohms min). Sensitivity: 87dB @ 1watt/1meter Power Rating: minimum 20 watts, 200 watts maximum Size: 14” H x 9” W x 13” D. Weight is approximately 23 lbs each.
Wow, that's one heavyweight pair!