Qe

Introduced: 1978
Dimensions:  46 x 31 x 25 cm
Bass: 1 x 20 cm
Highs: 1 x EMIT
Suggested for amplifiers with: 10-100 Watts per channel
Frequency range: 47 Hz - 32 kHz
Crossover frequencies: 2500 Hz
Suggested price (pair):  254 $

You can view a brochure of the Qe here.

A technical sheet with crossover schematics can be seen here.