Quantum 5

Introduced: 1977
Dimensions:  67 x 38 x 30 cm
Bass: 1 x 30 cm double coil
Mids: 1 x 3,8 cm
Highs: 1 x EMIT
Suggested for amplifiers with: 30-250 Watts per channel
Frequency range: 38 Hz - 32 kHz
Crossover frequencies: 600 Hz, 4000 Hz
Suggested price (pair):  730 $

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

You can view a brochure of the Quantum 5 here.
page 1, page 2

A technical sheet with crossover schematics can be seen here.