User manual ELECTRO-VOICE DX34

[. . . ] Should zone controls be located at the rack, or is local control required?The answers to questions like these will determine major aspects of the system design. Talking to individual users of the proposed system will help to flesh out important design details. Is the maitre d'hotel's station located directly under a speaker? [. . . ] If so, then an independent local volume control should be provided for that speaker, so that it can be adjusted to allow conversation Speaker Systems for Background Music and Paging page 2 with patrons. Will the person issuing pages be sitting under or near a speaker?If so, then consider equalization, or a separate muting circuit, to avoid feedback. Is light-switch height a comfortable location for zone volume controls, or does the user have another preference?Getting this kind of information at the beginning will help to avoid confusion and delays at the installation stage. Just as important as the human factors are the construction details of the site. How are the walls and ceilings constructed?What kinds of mounting surfaces will be encountered?Is the drop ceiling a lay-in type, or tongueand-groove?Where must cabling be routed, and how accessible are those spaces?Do partition walls or bearing members extend above the drop ceiling, where they may obstruct cable runs?For equivalent motor assemblies, the difference is on the order of 3 dB. The 4-inch will also have slightly reduced low-frequency capabilities. Read more about EV® ceiling speakers. Ceiling speakers data sheets: 205 Series 4" 405 Series 4" EP405 Series 4" EP407 Series 6. 5" PRO-8A Series 8" 209 Series 8" 309 Series 8" 409 Series 8" EP 309 Series 8" Expect The Unexpected The distributed sound system market is highly competitive and margins are small. It makes good sense to do everything you can to avoid problems at the installation stage and to be ready to handle callbacks or last minute changes smoothly. One way to do this is to anticipate problems before they occur and build contingency plans into your operation. For example, you should always have some inexpensive "fixes" at the ready. Say that the customer decides to change his floor plan at the last minute, Electro-Voice Installed Sound Technical Guide ©2002 Telex Communications, Inc. Speaker Systems for Background Music and Paging page 4 requiring you to add another zone to the system. Electro-Voice offers the MA/MR series of rack-mount or shelf-mount mixer/amplifiers, receivers and power amplifiers that enable you to offer a painless quote for the requested change, and come out a hero. You can even avoid the additional cost of installing a volume control in the new zone by putting the amplifier on a shelf in the zone. Similarly, it may make sense to pull a couple of extra cable pairs (both speaker lines and mike lines) when making your home runs. That way, if there's a base that wasn't covered in the specification, you can make it up onsite. [. . . ] Similarly, it may make sense to pull a couple of extra cable pairs (both speaker lines and mike lines) when making your home runs. That way, if there's a base that wasn't covered in the specification, you can make it up onsite. The practice also facilitates expanding the system at a later date. Be sure that the floor plans you use are up-to-date, and keep communications open with the client. [. . . ]