User manual ELECTRO-VOICE EVID CEILING SPEAKER

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[. . . ] 6 Layout ­ How Many?. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 THE "HIGH CEILING" SOLUTION - A REPLACEMENT FOR THE 920-8B . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 FAQ'S FOR EVID CEILING SYSTEMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 SYSTEM DESIGN QUESTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] The C8. 2HC also is designed for higher power, high SPL applications with a 60watt 70/100v transformer standard. No other ceiling speaker available offers this unique solution. The EVID 4. 2 and 8. 2 ­ Full Range Models with Punch The EVID C4. 2 Perfect for conventional rooms. It has excellent bandwidth in an esthetically very unobtrusive installation profile. It's 4" woofer and waveguide coupled titanium coated dome tweeter give smooth, wide frequency response. The enclosure is ported and tuned to provide surprising bass response in such a compact package. The C4. 2 would be ideal for most office spaces along with smaller restaurants and retail space where lower volume levels are used. It fits in close spaces and has a wide 130degree dispersion pattern for efficient coverage. The EVID C8. 2 is also unique in providing extremely high fidelity in a flush mount ceiling speaker. The secret is the optimally tuned enclosure coupled to a large 8" coaxial driver. The large enclosure ensures a full bottom end while the waveguide coupled tweeter gives uniform coverage for the high frequencies. The 10. 1 - Finally a Compact True Ceiling Subwoofer So often ceiling systems had to rely on expensive surface mount subwoofers or inadequate ceiling/flush mount options. In designing the 10. 1 we started with a mass optimized 10" woofer and a dual ported and tuned enclosure. The internal damping provides resonance free performance down to 45Hz. The Basics Selecting & Positioning Ceiling Loudspeakers Several key criteria determine the type and quantity of ceiling speakers to employ in a job. · · · · Room size Coverage density desired Ceiling height Type of audio program material being played There are specific EVID ceiling models for the job depending on the specifics of these criteria. In the traditional approach to overhead-distributed systems, loudspeakers are located in a grid arrangement whose dimensions are dictated by the room height and the directivity of the speaker elements. Two basic placement patterns prevail: square spacing, and hexagonal (or crisscross) spacing. In addition to the spacing pattern, the designer must choose between three density types, designated respectively as edge-to-edge, minimum overlap and center-to-center. The greater the overlap, the more uniform the coverage -- and the higher the cost. Budgetary constraints tend to favor sacrificing density, so the optimum center-to-center configuration is, in practice, the least common of the three. The illustration below shows these various layout patterns. Ceiling Systems ­ Size vs. Coverage In the past system designers usually specified 8-inch cone loudspeakers for distributed overhead systems, at least in part because they represented the traditional choice. In many cases, you can achieve excellent results -- at a significant savings -- by using 4-inch elements. This is true in jobs that do not require extended low-end response or high SPL levels. [. . . ] C8. 2HC and the C10. 1: The power taps are 60w, 30w, 15w and 7. 5w at both 70. 7v and 100v. A rotary switch on the baffle selects the taps for all models. The switch is marked showing the positions to use for the settings at 70v and 100v. What equalization should I use for EVID ceiling systems? The proper equalization settings depend on many factors, such as the quantity of speakers, the room characteristics, the typical operating level, the residual background noise in the venue, and the type of audience. The wide frequency response and high power handling of EVID systems lets you use a wide variety of equalization settings. EVID Ceiling Speaker System Designs What are some typical systems designs incorporating EVID series speakers? The EVID series of ceiling speaker systems are especially well suited to working with the MA series mixer amps or the CPS-1, CPS-2 and CPS2T power amplifiers. In the following section there are a number of suggested installation examples for a variety of environments incorporating EV amplification products. [. . . ]

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