ページ1に含まれる内容の要旨
EVF/EVH
User Manual
EVF-1121S
EVF-1151S
EVF-1181S
EVF-2121S
EVF-2151D
EVF-1122S (All Patterns)
EVF-1122D (All Patterns)
EVF-1152S (All Patterns)
EVF-1152D (All Patterns)
EVH-1152S (All Patterns)
EVH-1152D (All Patterns)
Electro-Voice EVF/EVH User Manual
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Table of Contents Rigging-Safety Warning ...........................................................................................................................................................................................3 1.0 Introduction ........................................................................................................................................................................................................4 1.1 Finishes and Colors Available .............
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Table of Contents (cont’) 6.5 HRK Rigging Structural Ratings for Horizontal Clusters ...................................................................................................... 46 6.51 Using Tie Plates as Main Load-Bearing Suspension ............................................................................................47 6.52 Suspension-Line Angles for HRK Kits ...............................................................................................................
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1.0 Introduction The Electro-Voice EVF series is a group of compact two-way front-loaded full-range systems, available with 12- or 15-inch woofers, augmented by low-frequency and subwoofer systems. EVF full-range sys- tems are available in two versions. The “S” versions employ 400-watt SMX low-frequency transducers and the ND2B medium-format, 1.4-inch exit/2-inch diaphragm compression driver. The “D” versions em- ploy 500-watt DVX-A low-frequency transducers and the DH7N large-format, 1.4-inc
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1.0 Introduction (cont’) Model Name EVF-1122S/96 (example) (As Shown) Model Name EVF - 1 12 2 S / 96 (Separated) Loudspeaker Number of Woofer Number of Woofer Coverage Description Family/Series Woofers Diameter Band Passes Series Used Pattern (EVF Series) (1 Woofer) (12-inch) (Two-Way) (SMX Series) (90° x 60°) Table 1b: Model number scheme, showing the meaning of each individual model number Typical EVF and EVH systems are shown in Figure 1, with key dimensions, suspension points, weights and
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1.0 Introduction (cont’) System Weight - 57.7 lb (26.2 kg) End View Front View Side View Rear View Figure 1c: Key dimensions, suspension points, weight, and center-of-gravity for EVF-1121S System Weight - 62.6 lb (28.4 kg) End View Front View Side View Rear View Figure 1d: Key dimensions, suspension points, weight, and center-of-gravity for EVF-1151S System Weight - 101.2 lb (46.0 kg) End View Front View Side View Rear View Figure 1e: Key dimensions, suspension points, weight, and center-of-gra
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1.0 Introduction (cont’) System Weight - 82.4 lb (37.4 kg) End View Front View Side View Rear View Figure 1f: Key dimensions, suspension points, weight, and center-of-gravity for EVF-2121S System Weight - 117.0 lb (53.1 kg) End View Front View Side View Rear View Figure 1g: Key dimensions, suspension points, weight, and center-of-gravity for EVF-2151D “S” System Weight - “D” System Weight - 143.0 lb (64.9 kg) 145.5 lb (66.1 kg) End View Front View Side View Rear View Figure 1h: Key dimensions,
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1.0 Introduction (cont’) Washer (x4) Eyebolt (x4) Figure 1g: Key dimensions for washers and eyebolts included with each loudspeaker End View Side View Rear View Figure 1h: Key suspension point dimensions for EVF or EVH loudspeakers as indicated in table below Dimension: A B C D E° EVF 12-inch 4.176” [106.07mm] 14.301” [363.24mm] N/A 16.129” [409.67mm] 15° EVF 15-inch 4.176” [106.07mm] 14.301” [363.24mm] N/A 18.353” [466.16mm] 15° EVF Subs 3.957” [100.50mm] 13.889” [352.77mm] 23.857” [605.97mm]
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1.0 Introduction (cont’) 1.1 Finishes and Colors Available The standard EVF/EVH indoor versions are finished in tough EVCoat™. In addition, all models are available in two levels of weather resistance, indicated by letters following the coverage-pattern numbers. The FG versions, e.g., EVF-1152S/64-FGB, are designed for full weather exposure and feature a fiberglass-fin- ished enclosure, stainless-steel hydrophobic grille and the CDG dual-gland-nut input-panel cover. The PI versions, e.g., EV
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1.0 Introduction (cont’) 1.4 Accessories for EVF and EVH Systems Note that some accessories are supplied with certain system versions, as noted. CDG: optional dual-gland-nut input-panel cover to protect the input connections from water. Note that this cover is supplied with the weather-resistant versions. CSG: optional single-gland-nut input-panel cover to protect the input connections from water. ® CDNL4: optional input-panel cover equipped with dual Neutrik Speakon NL4M connectors, providing
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3.0 Designing an EVF/EVH Cluster 3.1 General Aiming and Placement Guidelines Loudspeakers should be “pointed at the people” and away from reflective room surfaces. Since people are excellent absorbers of sound and room surfaces are often not, this practice insures not only that the audience will receive the high frequencies necessary for good voice intelligibility and musical clarity but also that the reflective surfaces do not energize the room with intelligibility-robbing reverberation. Lo
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3.0 Designing an EVF/EVH Cluster (cont’) 3.3 More on Coverage Patterns, Multiple Coverage Patterns, the Need for Clusters of Loud- speakers and How Far a Single Cluster Can “Reach” into a Venue The coverage patterns or angles mentioned previously are defined where loudspeaker output is 6 dB down from maximum, usually on-axis level. In order to help cover only the absorptive audience with sound, given different trim heights and the wide variety of venue shapes, the EVF and EVH series are offer
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3.0 Designing an EVF/EVH Cluster (cont’) Figure 2: Typical “reach” of a single loudspeaker into a venue (D ) in order to maintain I the desired ±3 dB coverage is about two times the distance to the closest seats (D ) S Adding a long-throw device will typically extend this reach to about three times the closest distance. See Figure 3. Figure 3: Adding a long-throw device extends the reach to about three times the distance to the closest seat For reaches beyond this, loudspeakers can be su
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3.0 Designing an EVF/EVH Cluster (cont’) 3.5 Multiple-Source Interference in Clusters Whenever two or more sources serve a single venue, some seats will receive strong signals from multiple sources. Consider two EVF-1122S/64 60° x 40° systems clustered side by side with their axes 60° apart to form a 120° x 40° cluster. If these systems maintained their rated coverage patterns into the low- frequency range, there would be essentially no interference. But the 12-inch-square waveguides used in
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3.0 Designing an EVF/EVH Cluster (cont’) This effect is shown in the frequency-response of Figure 5. Given the dimensions of the typical compact loudspeaker systems and when they are clustered in close proximity to one another, the first several in- terference nulls occur right in the middle of the vocal range. A frequency response with these ever-more- closely spaced nulls is known as a “comb filter” response, after the visual appearance of the response. Figure 5: Typical response off the arr
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3.0 Designing an EVF/EVH Cluster (cont’) At higher frequencies, the interference patterns become more densely packed, which essentially elimi- nates their audibility. Figure 7 shows this effect at 8,000 Hz. Figure 7: Horizontal polar response (blue center plot) of two closely clustered 60° x 40° loudspeakers aimed 60° apart, showing multiple, densely packed off-axis nulls at 8,000 Hz caused by multiple-source interference (see text for more details) 3.51 Reducing Multiple-Source Interferen
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3.0 Designing an EVF/EVH Cluster (cont’) One clustering technique that accomplishes this separation without putting a physical space between two full-range systems is putting a low-frequency or subwoofer system between two full-range systems. Such a cluster is shown in Figure 9, assembled with the optional HRK rigging kits. HRK-2 Kit (Sold Separately) HRK-2 Kit (Sold Separately) EVF Full-Range System EVF Subwoofer Note: Loudspeakers are non-specific and EVF Full-Range shown as an example. Sy
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3.0 Designing an EVF/EVH Cluster (cont’) Finally, another way to reduce interference is to apply signal delay of up to 8 milliseconds to one of the two systems. This requires a separate DSP (digital signal processor) drive to the delayed system. Figure 10 shows the dramatic smoothing achieved at 1,250 Hz. Note that the systems are still close together as in Figure 6. Figure 10: Horizontal polar response (blue center plot) of two closely clustered 60° x 40° loudspeakers aimed 60° apart, show
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4.0 Preparing EVF and EVH Systems 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 cluster performance: 1. Unpack all loudspeakers in the shop. 2. Check for proper model numbers. 3. Check the overall condition of the loudspeakers. 4. Check for continuity at the loudspeaker inputs. It is a good idea, once on site
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4.0 Preparing EVF and EVH Systems for Installation (cont’) To configure for biamp operation, 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. To facilitate this operation, there is a small recess in the edge of the input panel adjacent to the hole in switch card.) Reinsert the switch c
