Qa

Introduced: 1978
Dimensions:  63,5 x 35,5 x 30,5 cm
Bass: 1 x 25 cm
Highs: 1 x EMIT
Suggested for amplifiers with: 15-150 Watts per channel
Frequency range: 42 Hz - 32 kHz
Crossover frequencies: 2500 Hz
Suggested price (pair):  330 $

Click below for the owners manual.
page1, page 2, page3

You can read a review of the Qa here.
page 1, page2

A technical sheet with crossover schematics can be seen here.