User manual ELECTRO-VOICE 637S DATASHEET

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ELECTRO-VOICE 637S DATASHEET: Download the complete user guide (604 Ko)

Manual abstract: user guide ELECTRO-VOICE 637SDATASHEET

Detailed instructions for use are in the User's Guide.

[. . . ] 7 Can I paint the EVID speakers to match the environment?. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Can I use the C10. 1ceiling subwoofer with an external crossover and separate power amp channel?. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] Using premium quality audio systems can help increase sales through improved customer perceptions of the business's products or services. It has now been well established that the quality of music in commercial spaces greatly impacts the customer's perceptions of the products or services of the establishment. High quality music also increases the friendliness and job satisfaction of the employees. A Unique Solution to an Age Old Problem High ceilings and reverberant rooms have long been the downfall of many ceiling based distributed sound installations. The inherent desire for wide dispersion in smaller acoustically dead spaces works against the use of ceiling speakers in larger rooms with reverberant characteristics and higher ceilings. Until now there has not been a cost effective solution that combines good quality full range audio with useful pattern control. Some ceiling products attempted to have pattern control at the high frequencies but this proved largely ineffective at the critical voice spectrum of the audio range. The result was a speaker that had the same poor intelligibility problems when used in reverberant room as conventional ceiling speakers. The real solution to the problem requires that directionality must exist for the critical mid frequencies as well as the upper end of the spectrum. For this to happen a new approach is needed. The EVID Solution ­ Why is it Different? The EVID C8. 2HC ­ Wide spectrum Pattern Control in a Compact Package The EVID C8. 2HC is designed to provide directionality through the critical voice spectrum by employing a unique (patent pending) ported waveguide to the entire 8" driver. The resultant package is one that is compact, easy to install and provides far more intelligibility in reverberant or high ceiling environments than any other competitive model. The C8. 2HC also is designed for higher power, high SPL applications with a 60watt 70/100v transformer standard. For example, due to its smaller cone diameter, the C4. 2 exhibits significantly wider dispersion (130 degrees) than the C8. 2 (110 degrees) at the -6 dB points. The effect of this characteristic on an overhead system is indicated in the illustration below. In replacement applications where existing speaker positions are used, the C4. 2 (shown in angle "A") offers greater overlap and, thus, more uniform coverage than an older conventional 8-inch unit (shown in angle "B". When specifying a new system, you can take advantage of the C4. 2's wider dispersion to decrease the number of speakers required to cover a given area. The C4. 2 will also have slightly reduced low-frequency capabilities below 90 Hz. Neither of these factors is a significant problem in many distributed systems, however. The C4. 2 is conservatively rated to handle 50 watts of continuous power equal to or greater than most other brands of 8-inch units so its continuous SPL output will be more than adequate. Moreover, its reduced output below 90 Hz can easily be overcome with the addition of the C10. 1 subwoofer. For these reasons, the C4. 2 represents a great way for you to maintain good audio coverage while maintaining a competitive edge in price quotes in installations that do not need the extended performance of the larger models. SPL Requirements ­ How Loud? The EVID C8. 2 is a great speaker to employ when higher SPL are required. The fidelity and bandwidth of the unit is substantial and is ideal for applications requiring high quality foreground music reproduction. This is more than sufficient for most applications. Layout ­ How Many? As we indicated earlier the number of speakers required to cover the job will vary depending on three factors: · · · Coverage angle specification of the speaker Ceiling height Degree of overlap desired The chart below shows the effective coverage diameter of the EVID models assuming a 4-foot listening plane height. [. . . ] This circuit gives full-range protection including the woofer and tweeter. The protection circuit operates in all modes. What are the characteristics of the matching transformers in the EVID models? EVID ceiling speakers incorporate high performance transformers that are very stable at all frequencies in their range and exhibit very little low-frequency saturation. The matching transformers in all the EVID units are designed to provide full rated output down to the low frequency limit in its specification with virtually no saturation. This results in less heat generation, higher power transfer and more speaker efficiency. Do the EVID ceiling speakers work with both 70v and 100v systems? Yes all ceiling speaker models work on both 100v and 70. 7v lines. What are the power taps for the various EVID "t" models"? · · C4. 2 and the C8. 2: The power taps are 30w, 15w, 7. 5w, 3. 75w and 1. 88w both 70. 7v and 100v. [. . . ]

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