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1948-49 Theatre Catalog, 7th Edition, Page 426 (413)

1948-49 Theatre Catalog, 7th Edition
1948-49 Theatre Catalog
1948-49 Theatre Catalog, 7th Edition, Page 426
Page 426

1948-49 Theatre Catalog, 7th Edition, Page 426

Motiograph Sound Equipment Panels for large Drive-in Theatres. On Left lTopl is 55-7555 Switching Panel. Controlling Ramp Sound Feed and Lighting Feed Circuits. lMiddIel 55-7520 Power Unit. {Below} Two 55-7558 Ramp Switching Panels. Center panel contains Two 25 Watt MA-7505A Driving Amplifiers (Above and Belowl, with Motlograph built Turntable designed both for new Long Playing and other t pes of Records. On Right are Two 250 Watt Power Amplifiers Above and Below) each with squicient power for 1,000 In-Car Speakers, with AM and FM Radio for incidental music.



Inc" 4431 W. LAKE ST., CHICAGO 24, ILL.



Motiograph offers two basic sound systemsethe 20 watt Model M-9-B and the 40 watt M-911 Dual, for theatres of 1,000 and 2,000 seats. The power output of these basic systems may be brought up to serve theatres up to 6,000 seats by the addition of one or more power amplifiers.

Motiograph also offers sound systems for drive-ins including in-car speaker systems with power output of 100, 150, 250 and 500 watts, the largest of which will serve more than 1000 cars, and has emergency provision permitting operation at 50, 250 or 500 watts. Central loudspeaker systems with power output of 75 and 150 watts also are available.

With your choice of any model Altec-Lansinngoice of the Theatre" or Motiograph loudspeaker equipment, Model M-9-B is available with five sizes of loudspeaker systems and Model M-911 Dual with three sizes, while there is choice of three large loudspeaker systems in the higher powered sound system models.

The Motiograph SH-7500 sound reproducer is based on designs of Electrical Research Products Division of Western Electric Company.

Main amplifiers are all power-rated at two per cent distortion. First quality sound reproducers and DC. excitation are offered in every model. In all dual models two or more main amplifiers are furnished, so that in an emergency sufiicient amplifier power is available. Switching panels are furnished to afford facilities for operating either amplifier alone.

Motiograph sound systems have been designed for quick, easy servicing in the held.

For literature and complete information write


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1948-49 Theatre Catalog, 7th Edition, Page 426