Published by Universal Microphone Company, Inglewood California, 1930
Pamphlet. Condition: Used - Very Good. 16 pages. Illustrated: microphones, amplifiers, mounts, stands, transformers, potentiometer, cables. 5.75 x 3.5", printed wrapper. Wrap color offsetting to facing pages, else VG.
Published by Universal Microphone Co., Ltd., Inglewood, CA, 1937
Seller: Book Booth, Berea, OH, U.S.A.
Paperback. Condition: Good. Revised edition. Pages clean; binding tight; 1.5" crease to back cover lower left corner, else minor wear to covers. 30 pages. Illustrated. Explains how sound recordings are made on discs. Scarce. Size: 3.5" x 6.5".