Electro-Voice EVID Use of Subwoofers, Reverberant Rooms High Ceilings, SPL Requirements How Loud?

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Appendix B — System Design Guide

age while maintaining a competitive edge in price quotes in installations that do not need the extended performance of the larger models.

Reverberant Rooms

and High Ceilings

Situations arise, however, in which controlled coverage is more desirable than broad disper- sion.Very large live spaces such as gymnasi- ums, convention centers, shopping mall atri- ums, and the like all benefit from more con- trolled sound projection. In such installations, the EVID 8.2HC is the best choice. Its 75- degree coverage pattern above 1kHz provides more intelligibility in large, acoustically live spaces. It also has a high 93dB sensitivity rating for optimum efficiency.

SPL Requirements: How Loud?

The EVID C8.2 is a great speaker to use when higher SPL is required.The fidelity and band- width of the unit is substantial and is ideal for applications requiring high quality foreground music reproduction.The C8.2 has substantial low frequency energy down below 60Hz.This is more than sufficient for most applications.

Use of Subwoofers

The C10.1 subwoofer can add considerable low-frequency performance to any EVID instal- lation. It is important to note that the C10.1 subwoofer depends on the ceiling and walls to properly load itself and to reinforce its bass out- put. Correct positioning is important to get maximum impact.

In smaller rooms when a single C10.1 is used, a center or near-center position is best. This gives the most even coverage. For larger rooms where more than one C10.1 are employed, the added effect of the room’s walls can be used. In such a space, position the sub- woofers evenly throughout the room and a few feet from the wall or corners.The added load- ing of the walls will enhance the response in these larger areas.

Layout: How Many?

The chart below shows the effective coverage diameter of the EVID models assuming a 4-foot listening plane height. Using these figures you can lay out a coverage pattern for the job after deciding the overlap criteria described earlier on page 10.

Coverage Diameter by Ceiling Height

Model

8'

12'

20'

24'

C4.2

17'

34'

68'

85'

C8.2

11.5'

23'

45'

57'

C8.2HC

6.5'

12'

24'

30'

C10.1

180° coverage

 

 

EVID™ Ceiling Series Installation and Operation Manual

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Contents Evid Table of Contents Important Features Welcome/Important FeaturesWelcome Packing List Figure Model Summary/Packing ListEvid C4.2 Evid C10.1Product Feature Identification Product Feature IdentificationEvid Series Ceiling Mount Speaker Accessories Evid Ceiling Series Systems sold in pairsInstallation Note USE of Optional ROUGH-IN Accessories Installation and WiringInstallation Note Controlling Vibration RR Series Mounting PlatesAttach Wiring to the Terminal Connector Figure Install C-Ring and/or Tile Rails FigureInstallation Note Tile Rails and C-RING Installation Note ConnectorInstallation Note Subwoofer Polarity Wiring GuidelinesSecure the Cable to the Speaker Figure Installation Note Ceiling Tile Caution Installation Note Alternate Conduit FittingsMount the Speaker Into the Ceiling Figure Installation Note Mounting Tabs Adjust Tap Selector FigureInstallation Note Grille Safety Feature Connect an Auxiliary Support Line FigurePainting Process Appendix a Painting the SpeakerSelecting and Positioning Ceiling Loudspeakers Appendix B System Design GuideCeiling Systems Size vs Coverage Reverberant Rooms High Ceilings Use of SubwoofersSPL Requirements How Loud? Layout How Many?Troubleshooting Table Appendix C Troubleshooting TableUniform Limited Warranty Appendix D WarrantyProduct Specifications Evid C4.2 Evid C8.2 Evid C8.2LP Evid C8.2HC Page Page Telex Communications, Inc /2003 Part Number Rev. D
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