|The 312B-4 Speaker Console integrates the 75S receivers,
32S transmitters, 30S-1 and accessories into an operating system. The
KWM-2 and 30S-1 can also be integrated into an operating system by the 312B-4.
A speaker, RF directional wattmeter with 200 and 2000 watt scales,
and a phone patch are included in the console. Size 10" wide, 7 3/4"
high, 12 3/4" depth. Weight 8 1/2 lbs.
Information from Collins Amateur
Radio Equipment Catalog No. 32