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Complete Line PA Equipment
S-M High Quality-Lowest Prices
Silver-Marshall now offers a complete line of the highest quality PA equipment covering new achievements in the field of sound engineering. Based on the time-proven utility, economy and serviceability of rack-and-panel equipment, S-M presents a number of flexible, high-quality units, many of them available for the first time at a popular price. These unit panels may be assembled into a complete sound system for any desired type of service from centralized distribution for schools, hotels and similar institutions, to the more general type of installation for coverage of large indoor and outdoor audiences. It is possible to start out with a few units and expand the system from time to time at a minimum of cost. Added advantages of this type of equipment are accessibility for changes and maintenance, convenience in operation and small floor space requirements. Power outputs from 15 to 100 watts or more may be utilized. Input equipment for voice, radio and record reproduction is available, together with several extremely flexible input control panels, thus allowing wide variety in the mode of operation of the system.
A typical school rack is illustrated with panels, from top to bottom, described below.
PA-72A SUPERHETERODYNE TUNER PANEL A six-tube Super with power supply, uses 3-'51 vario-mu tubes, has eleven tuned circuits, gives better than 1 Okc selectivity. Includes jack for monitoring speaker or phones. Output impedance 200 ohms.
PA-53B INPUT CONTROL PANEL Has control for microphone, radio, and record pick-up inputs, with one-stage amplifier for microphone, allows super-imposing of microphone on either radio or record pick-up. Incorporates meter for adjusting filament on amplifier tube or current on microphone. Input impedances all 200 ohms. Also available for 19-inch relay racks.
PA-60B VOLUME INDICATOR PANEL A precision power-level indicating-instrument,
with rectifier-type meter calibrated directly in
db( range— 8 to 48 db), is invaluable for maintaining correct levels in centralized systems, indicating overload, etc. Also available fo1 9-inch relay racks.
PA-45A RECORD REPRODUCER
PANEL
Contains a constant-speed synchronous motor
and high grade pick-up. Output impedance 200
ohms. Also available for 1 9-inch relay racks.
PA-81 A DISTRIBUTING PANEL Designed to distribute output of main amplifiers to twenty 200 ohm speaker lines, all feeding the same type of speaker. Also available for 19-inch relay racks.
692R PANEL Contains standard 692 fifteen watt three-stage amplifier with panel for rack mounting.
Write to Mr. Gray for prices, details and the new November Catalog
SILVER-MARSHALL, Inc.
6401 West 65th Street, Chicago
Canadian Division: 75 Sherbourne St., Toronto
Export Division: 41 Water St., New York City, U. S. A.