Related Manuals for Electro-Voice EVA-2082S/906
Summary of Contents for Electro-Voice EVA-2082S/906
-
Page 1: User Manual
EVA Series User Manual EVA-2082S/906 EVA-2082S/920 EVA-2082S/126 EVA-2082S/1220 Electro-Voice® EVA Series User Manual... -
Page 2: Table Of Contents
Table of Contents Rigging-Safety Warning ..............................3 1.0 Introduction ..................................4 2.0 Tool List ..................................7 3.0 Designing an EVA Array ............................7 3.1 Applications for which EVA Arrays are Most Appropriate ..............7 3.2 Typical Number of Arrays ..........................7 3.3 Determining EVA Array Configuration with EVADA (EVA Design Assistant) Software .....8 3.4 Other Design Examples .......................... -
Page 3: Rigging-Safety Warning
Rigging-Safety Warning This document details general rigging practices appropriate to the entertainment industry, as they would apply to the rigging of Electro-Voice EVA loudspeaker systems. It is intended to familiarize the reader with standard rigging hardware and techniques for suspending EVA loudspeaker systems overhead. Only per- sons with the knowledge of proper hardware and safe rigging techniques should attempt to suspend any sound systems overhead. -
Page 4: Introduction
Figure 1. Each EVA module contains two separate, vertically stacked line-array elements. EVA-2082S/906: two-way, LF/HF line-array module with a 90° horizontal x 6° vertical coverage pattern (for long throws) and passive crossover/HF-shading/EQ network. The enclosure is trapezoidal in the verti- cal plane with a 6°... - Page 5 CDG dual-gland-nut input-panel cover. The PI versions, e.g., EVA-2082S/906-PI, are rated for indirect outdoor exposure only in protected areas, such as under a roof overhang, and feature a stainless-steel hy- drophobic grille and CDG dual-gland-nut input-panel cover on an enclosure finished in standard EVCoat.
- Page 6 Spreader Bar Attach Holes Top View Left View Front View Rear View Right View Bottom View Figure 1a: EVA-2082S/906 or EVA-2082S/126 dimensioned views Spreader Bar Attach Holes Top View Left View Front View Rear View Right View Bottom View Figure 1b: EVA-2082S/920 or EVA-2082S/1220 dimensioned views Electro-Voice®...
-
Page 7: Tool List
2.0 Tool List Listed below are the tools required to assemble an EVA array: Phillips #2 screwdriver (for attaching cosmetic end panels). 6-mm Allen (hex) wrench (for attaching tie plates and assembling grids). 3/16-inch flat-blade screwdriver (for attaching signal wires to input-panel connectors). 3.0 Designing an EVA Array 3.1 Applications for Which EVA Arrays Are Most Appropriate The total included vertical angles of the EVA modules in side view (6°... -
Page 8: Determining Eva Array Configuration With Evada
3.0 Designing an EVA Array (cont’) 3.3 Determining EVA Array Configuration with EVADA™ (EVA Design Assistant) Software EVADA™ is Excel-spreadsheet-based software for determining optimum array configurations for a given venue and trim heights. The latest version of EVADA is downloadable from the Electro-Voice Web site (www.electrovoice.com). - Page 9 3.0 Designing an EVA Array (cont’) Figure 4 shows the EVADA Main tab, where the array is built and its performance evaluated in the three frequency bands mentioned above. This tab is full of information and things to enter: In the top middle of the view is where the number of suspension points (one or two, front to back), array trim height and distance downstage from front of rig are chosen.
- Page 10 3.0 Designing an EVA Array (cont’) Producing the most uniform front-to-back coverage is an iterative process. In general, it will be found that: The top-most module will be aimed above the last-row heads. This may appear to aim ar- ray output at the back wall, which if reflective could produce audible delayed signals in the front of the room.
- Page 11 3.0 Designing an EVA Array (cont’) Figure 5 shows the Picture tab of the EVADA spreadsheet, with a side view of the array and its suspen- sion. The array is drawn to scale, in feet or meters as selected in the Units tab on the Venue page (English or metric, respectively).
- Page 12 3.0 Designing an EVA Array (cont’) Figure 6 shows the Report tab of the EVADA spreadsheet, showing such details as hang points (in this example, pinholes 18 and 0 on the extended grid), type of hang point (main or pullback), load (lb), mod- ules in the array and their vertical aiming angles (note that the module inclination angle is the rear panel of the module).
- Page 13 3.0 Designing an EVA Array (cont’) The Cable Loss tab allows the user to enter the combined impedance of an EVA array and the length and gauge (AWG) of the wire feeding it, in order to calculate the level lost (dB) in the cable feeding the array. See Figure 7.
-
Page 14: Other Design Examples
3.0 Designing an EVA Array (cont’) 3.4 Other Design Examples 3.41 Dealing with the Relatively High Low-Frequency Variation of Short Arrays The example of Figure 4 is a three-module array addressing a flat floor from a trim height of 23 ft, with the first row 10 ft away from the array and the last row 80 ft away. -
Page 15: A Five-Module Array Example
3.0 Designing an EVA Array (cont’) 3.42 A Five-Module Array Example Figure 9 shows another, five-module array in an 80-ft-deep venue with the front row five ft from the ar- ray and whose floor begins to rise about halfway back. The three frequencies not only track very well but nearly all of the venue is within ±3 dB front to back. -
Page 16: An Eight-Module Array Example
3.0 Designing an EVA Array (cont’) 3.43 An Eight-Module Example Figure 10 shows an eight-module array in a large theater with two balconies. Note that this array cannot be driven from one amplifier channel because only one of the modules uses the optional EVA-AM attenu- ation module. -
Page 17: Preparing Eva Modules For Installation
4.0 Preparing EVA Modules for Installation 4.1 Recommended Preflight Procedures For any installed sound system, certain checks made at the installer’s place of business can prevent ex- pensive on-site delays. A short-list follows, and sets the stage for proper array performance: Unpack all loudspeakers in the shop. - Page 18 4.0 Preparing EVA Modules for Installation (cont’) To attenuate the top HF element, remove the switch card by drawing it toward you using the central finger hole. (The switch can also be removed with the end of a flat-blade screwdriver, by placing the blade end in the switch hole and using the adjacent edge of the input panel as a fulcrum.
- Page 19 4.0 Preparing EVA Modules for Installation (cont’) Figure 12: EVA input panel removed, showing green PC board and the four bosses to which the optional EVA-AM attenuation module will be attached Figure 13: EVA input panel with EVA-AM installed showing connector plug-in Electro-Voice®...
-
Page 20: Eva Rigging System
The vertical aiming angle between the two mod- ules is fixed by their vertical draft angles. The draft angle is 3° for the EVA-2082S/906 and EVA-2082- S/126 long-throw modules and 10° for the EVA-2082S/920 and EVA-2082S/1220 short-throw modules, producing 6°, 13°... -
Page 21: Deciding Which Grid Configuration To Use With An Eva Array
5.0 EVA Rigging System (cont’) While 80-90% of EVA applications will be accommodated with arrays of three or four modules. Up to eight EVA modules may be suspended together up to a combined maximum loudspeaker column weight of 720 lbs. 5.2 Deciding Which Grid Configuration to Use with an EVA Array 5.21 Standard Grid with or without Second Spreader Bar The EVA-SG standard grid is shown in Figure 15. -
Page 22: Extended Grid With Or Without Second Spreader Bar
5.0 EVA Rigging System (cont’) A second spreader bar, EVA-GXB, is available. The second spreader bar is used when two front-to-back pickup points are desired/required. Figure 16 shows an EVA-SG grid with a second spreader bar. When two spreader bars are used, one is attached to the extreme front hole positions in the side arms and the other is attached to the extreme rear position. -
Page 23: Use Of Two Standard Grids
5.0 EVA Rigging System (cont’) 5.23 Use of Two Standard Grids Two EVA-SG standard grids may also be used with an EVA array, one attached to the upper module and the other attached to the lower module, acting as a pull-up grid. This is a way to achieve extreme down angles, such as might be encountered in a distributed arena system. -
Page 24: Assembling And Flying An Eva Array
5.0 EVA Rigging System (cont’) 5.3 Assembling and Flying an EVA Array On each end of an EVA module are a pair of upper and lower connection points that accept the supplied M10 flathead bolts to either (1) attach the side arms of an EVA-SG standard grid or an EVA-EG extended grid to the top of the upper array module (or bottom of the lower array module as well) or (2) attach the tie plates supplied with each module so that the modules can be attached to each other. -
Page 25: Rigging-Strength Ratings And Safety Factors
6.0 Rigging-Strength Ratings and Safety Factors 6.1 Working-Load Limit and Safety Factor Definitions The structural ratings for all of the EVA rigging components and complete loudspeaker systems are based on test results in which parts were stressed to failure. Manufacturers typically present the structural- strength ratings of mechanical components or systems as either the working-load limit (WLL) or the ulti- mate-break strength. -
Page 26: Structural-Rating Overview
6.0 Rigging-Strength Ratings and Safety Factors (cont’) 6.2 Structural Rating Overview Designing a safe structural array is ordinarily a very complex process best left to experienced profession- als. To make EVA systems both safe and easy to use, Electro-Voice engineers have chosen to treat EVA arrays as a single unified structure rather than individual components. -
Page 27: Simplified Structural-Rating Guidelines
Total weight of all enclosures in the array plus accessories, cabling and rigging. Angled forces acting on rigging components and enclosures. The resulting analysis has shown that any combination of EVA 6° vertical modules (EVA-2082S/906 and EVA-2082S/126) and EVA 20° vertical modules (EVA-2082S/920 and EVA-2082S/1220) may be rigged... - Page 28 6.0 Rigging-Strength Ratings and Safety Factors (cont’) WHEN APPLYING THE STRUCTURAL RATING GUIDELINES TO ANY EVA LOUDSPEAKER SYSTEM SUSPENDED OVERHEAD, THE USER MUST OBEY THE FOLLOWING RULES: Never exceed 720 lb (327 kg) total column weight of suspended loudspeakers, accesso- ries and cabling.
- Page 29 6.0 Rigging-Strength Ratings and Safety Factors (cont’) Figure 21: Side-to-side angular pull structural-rating guidelines for EVA spreader bars Figure 22: Front-to-back angular pull structural-rating guidelines for EVA spreader bars Electro-Voice® EVA Series User Manual...
-
Page 30: Electro-Voice Structural-Analysis Procedures
6.0 Rigging-Strength Ratings and Safety Factors (cont’) 6.4 Electro-Voice Structural-Analysis Procedures Electro-Voice maintains a structural pull-test facility in Burnsville, Minnesota USA which includes load cells with digital-electronic display and recording. The load cells are calibrated annually by an independent laboratory to a standard traceable to the United States National Bureau of Standards. This pull-test facility is capable of pulling to destruction both individual rigging components and complete loudspeaker sys- tems. -
Page 31: Rigging Inspection And Precautions
7.0 Rigging Inspections and Precautions Electro-Voice EVA Loudspeaker Systems: Prior to each use, inspect the enclosures for any cracks, deformations or missing or damaged components that could reduce enclosure strength. Inspect the tie plates between enclosures for cracks, corrosion or other deformations that could reduce their strength and integrity. -
Page 32: References
8.0 References 8.1 Rigging (printed) [1] W.E. Rossnagel, L.R. Higgins & J.A. MacDonald, Handbook of Rigging for Construction and Industrial Operations, McGraw-Hill Book Company, New York, NY, USA (1988). [2] H. Donovan, Entertainment Rigging, http://www.riggingbooksandprograms.com, Rigging Seminars, Seattle, WA, USA (2002) [3] J.O. -
Page 33: Rigging (Websites)
8.0 References (cont’) 8.3 Rigging (Web sites) [1] http://www.rigging.net [2] http://www.cmworks.com/ [3] http://catalog.thecrosbygroup.com/maininterface.htm Electro-Voice® EVA Series User Manual... -
Page 34: Notes
Notes Electro-Voice® EVA Series User Manual... - Page 35 Notes Electro-Voice® EVA Series User Manual...
- Page 36 Electro-Voice ® U.S.A. and Canada only. For customer orders, contact Customer Service at: 800/392-3497 Fax: 800/955-6831 Europe, Africa, and Middle East only. For customer orders, contact Customer Service at: 12000 Portland Avenue South, Burnsville, MN 55337 + 49 9421-706 0 Fax: + 49 9421-706 265 Phone: 952/884-4051, Fax: 952/884-0043 Other Internatonal locations.