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1945 Theatre Catalog, 4th Edition, Page 337 (313)

1945 Theatre Catalog, 4th Edition
1945 Theatre Catalog
1945 Theatre Catalog, 4th Edition, Page 337
Page 337

1945 Theatre Catalog, 4th Edition, Page 337

Notes on Sound and loudspeaker Equipment

Survey of Makers' Opinion on What Is Best And What They Offer to Achieve Those Ends

To provide vital, living sound entertainment; to recreate the tenseness of drama, the natural realism of dialogue, the thrill of full fortissimo, the crash of angry thunder, the faint rustle of leaves, the excited whisper*and yet throughout assure very patron of comfortable listening pleasure-eshould be the goal toward which every exhibitor should set himself.

Dramatic effects, full orchestra, and vocal climaxes require acoustic power in very large amounts. This means that adequate amplifier power and high efficiency of the loudspeaker system are needed to produce the power needed to give the theatre de luxe presentation regardless of its size

While to achieve this end all elements of a sound system should be the best that can be afforded, it is of the performance of the loudspeaker system that the patron is most acutely aware. Accordingly, the speaker system for the desired de luxe presentation must have high power capacity to stand up under the strain without failure and without distortion. Recording studios are now extending the dynamic range of recording, and these developments will place new demands on the power delivered by the speaker system.

Excellence of dialogue presentation requires that the speaker system have a broad frequency range, with the voice overtones properly balanced against the fundamentals, with all frequencies handled smoothly and without improper emphasis of some and absence of others. De luxe presentation of music requires still broader frequency range, from deep bass to the highest overtones, and here the necessity of proper balance assumes an added importance.

De luxe precentation requires that the speaker system have uniform distribution to carry the full frequency range to all the seats of the theatre. Seats with poor sound coverage should now be considered a thing of the past. The speaker system mutt have the correct physical proportion for the particular auditorium in which it is installed. It has been proved that a speaker system, suitable for a 600-seat theatre, fails to provide top performance for one of 800 seats, delivers a noticeably poor one for 1,200 seats, and is wholly inadequate for a 2,000-seat theatre.

Accordingly, to secure de luxe presentation in theatres of all sizes and types a large number of combinations of horns, high- and low-frequenCy speakers, must be available.

Wartime improvements in materials and new achievements in design have produced greatly increased efficiency in sound systems and speakers. Greater utilization of available amplifier power and its transfer to acoustical power in a Wider frequency range has resulted



All material presented under the name of a, mmzufacturer has been received from the particular company involved. Presentation of

this material in theSe columns does

not necessarily signify the endorsement, by the THEATRE CATALOG or its Editors and staff, of the opinions expressed or of the equipment described.

in extending the bass range and improvement of definition in sounds which occur throughout the range. Intimate and more natural screen presence, higher intelligibility, more perfect balance between high and low frequencies, realism, and elimination of backstage reverberation and hangover are available in the newer equipments.

That the reader may have a better understanding of sound equipmenteand some of the equipment that is now or presently will be availableethe manufacturers have been given a chance to talk about their products.

While the various companies, naturally, have their own very good reasons for doing things as they do, all of them still have but one major objective in View: To create mechanisms and machinery which will give your theatre patrons the best possible sound.

For the material that follows, acknowledgment and thanks are expressed to L. W. Davee and the Century Projector Company; C. H. Roloff and the DeVry Corporation; A. J. Lindsley and the National Theatre Supply Division of National-Simplex-Bludworth, Inc., (for the International Projector Corporation); Fred C. Matthews and Motiograph; Homer B. Snook and the Radio Corporation of America; and C. L. Stong and the Westrex Corporation.


The Voice of the Theatre brings to the screen living, breathing characters, sound effects which are natural, and music which is authentically reproduced. Every seat in the theatre is equally reached by the wide frequency range of the Voice of the Theatre, assuring high intelligibility along with easy, comfortable listening for every patron. They en AlTEC-lANSING'S MODEL A-l VOICE OF THE THEATRE
1945 Theatre Catalog, 4th Edition, Page 337