Introduced: 1978
Dimensions:  46 x 30x 24 cm
Bass: 1 x 16 cm
Highs: 1 x EMIT
Suggested for amplifiers with: 20-75 Watts per channel
Frequency range: 50 Hz - 32 kHz
Crossover frequencies: 4500
Suggested price (pair):  260 $

A technical sheet with crossover schematics can be seen here.
Note that some technical specifications in the pdf file are not accurate such as size, woofer size, frequency response and suggested power. But the specifications on this site are accurate.