Boxoffice (Oct-Dec 1963)

over or direct to the voice coil from matching transformer. To sum up, if you plan on installing new loudspeakers, we suggest that you go to a theatre that has a late-type setup and listen to the quality. Do this with several makes before you make final decision on your selection. Sometimes one can change either the low or high frequency speaker and make considerable improvement in the quality and clearness in sound reproduction, but in most cases it is recommended, from long experience in the field, to have a “matched” loudspeaker system, using care in match ADLER LETTERS ASSURE SELLING IMPACT FOR YOUR CHANGEABLE SIGNS! The only complete line of Plastic and Aluminum letters, from 4" to 31", including "Snap-Lok" Plastic Letters that won't blow off, won't fall off. All sizes of Adler Plastic Letters available in Red, Blue, Green, Opaque Black. For Free Catalog of Adler "Third Dimension" Changeable Letters — Mechanical Letter Changer — Stainless Steel Frames Glazed with Glass or Plastic — LowCost "Sectionad" Displays — Cast Aluminum "Mounties" for building identification — write: ADLER SILHOUETTE LETTER CO. 11843-A W. Olympic Blvd., Los Angeles 64, Calif. For YOUR BOXOFFICE Engraved b y our exclusive process on lucite to your specifications. LAMOLITE* ILLUMINATED PRICE ADMISSION SIGNS Our enlarged plant facilities assure OVERNIGHT service from coast to coast. Plastic Signs Engraved for the Entire Theatre Send tor Folder *Pat pend. DURA ENGRAVING CORP. LAMOLITE-BOWMAN DIVISION 133 West 20th Street New York 11, N. Y. GLASS* ssssj * HIGHEST QUALITY (LEANS * GLASS CHROME POPCORN MACHINES Spar*117*6 ciean ing impedance and the crossover for perfect distribution of the “highs” and “lows.” Servicing loudspeakers — The loudspeaker system requires an occasional cleaning and inspection of connections for tightness. The wing nuts and washers securing the cover on the back of the lowfrequency unit should be checked or you might have a rattle if they become loose. At least once every six months one should tighten the wing nuts and check the connections to the speakers. Also the speakers should be cleaned inside and out. The crossover point with many modern sound systems for theatres is around 2,000 cps. So this should be checked by an engineer, or secure this data from the manufacturer of your particular loudspeaker system. This is very, very important data and should be adhered to for high quality sound reproduction. We briefly bring to your attention this information: Back wall “slap” is probably the most difficult to clear, especially in auditoriums with high balconies or large unbroken back wall areas, as direct sound may be reflected from the back wall to the seating area. The back wall should be treated with sufficient acoustical material and the high frequency unit directed down to the center of the seating area but still be heard clearly in the back row of seats. Side wall “slap” can be helped by plugging two upper outside cells of the highfrequency horn with wool yarn, and, of course, properly treating the walls with sufficient acoustical material. Winner of Grand Prize Louis Kerasotes, left, of Kerasotes Theatres, Springfield, III., and a member of the National Ass'n of Concessionaires, was the lucky winner of the NAC Tradeshow Treasure Chest grand prize, donated by Continental-Apco, Inc. Melville B. Rapp, director of sales of Continental-Apco, made the presentation of a 1963 RCA Stereo, Hi-Fi, AM-FM set at the recent tradeshow in New York City. Use Readers' Service Bureau Coupon, Page 19. HEYWOOD WAKEFIELD COMFORT ... where it pays off! Patrons of Manhattan’s new Cinema I and Cinema II sit deep in the engineered comfort of TC-725 chairs by Hey wood -Wakefield. Coilspring seats and shaped, polyfoam padded backs. Designed to equal the elegant surroundings. For details, contact Hey wood -Wakefield, A Public Seating Division, Menominee, Mich. BOXOFFICE :: December 9, 1963 13