Title: Cinema Loudspeakers (Кинотеатральные громкоговорители)
Author: I. M. Bolotnikov
Publisher: State Publishing House "Iskusstvo" (Art), Moscow, 1957
Title page information:
    Library of the Cinema Mechanic series
    Revised and enlarged edition of the 1952 book "Loudspeakers for Sound Cinema"
    1957
Physical specifications:
    Softcover
    Format: 84 x 108 1/32
    Printed sheets: 6.6 (conventional 10.8)
    Authorized sheets: 9.9
    Print run: 10,000 copies
    Catalog number: Sh05783
    Price: 4 rubles 50 kopecks
Contents (chapter titles):
    From the Author (p. 3)
    Chapter I – General Information on Loudspeakers (p. 5)
    Chapter II – Direct-Radiator Electrodynamic Loudspeakers (p. 26)
    Chapter III – Horn-Type Electrodynamic Loudspeakers (p. 60)
    Chapter IV – Two-Way Loudspeakers (p. 84)
    Chapter V – Operation of Loudspeakers (p. 110)
    Chapter VI – Repair of Loudspeakers (p. 144)
Notable technical content:
    Includes a description of the thermionic high-frequency loudspeaker (ionophone) by Telefunken (West Germany) with a frequency range of 1–20 kHz
    Features a schematic with a Tesla transformer
    Covers multi-channel stereo systems for widescreen cinema
Condition: (to be added by seller)

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Don't miss the chance to own this timeless, rigorous classic—a textbook that shaped the minds of countless physicists. A definitive volume for study, reference, and collection!