Reference Standard 1.5

Introduced: 1980
Dimensions:  67 x 38 x 28 cm
Bass: 1 x 30 cm Dual-Voice-Coil Watkins
Mids: 1 x 12 cm
Highs: 1 x EMIT
Suggested for amplifiers with: 60-250 Watts per channel
Frequency range: 38 Hz - 32 kHz
Crossover frequencies: 250 Hz, 5000 Hz
Suggested price (pair):  900 $

For the manual click below.
page 1, page 2, page 3, page 4, page 5, page 6, page 7, page 8, page 9, page 10, page 11

Here you can get the crossover schematics of revision A-F and G&H.

View a brochure of the RS series here.

A technical sheet with crossover schematics can be seen here.