Reference Standard 9 (b)

Introduced: 1982
Dimensions: 45 x 30 x 25 cm
Bass: 1 x 16 cm
Highs: 1 x Polycell
Suggested for amplifiers with: 20-75 Watts per channel
Frequency range: 48 Hz - 22 kHz
Crossover frequencies: 3000 Hz
Suggested price (pair): 196 $

A technical sheet with crossover schematics of the RS 9 can be seen here.