Instrukcja obsługi Electro-Voice EVF-1152D/99

Electro-Voice głośnik EVF-1152D/99

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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
Table of Contents
Rigging-Safety Warning 3 ...........................................................................................................................................................................................
1.0 Introduction ........................................................................................................................................................................................................4
1.1 Finishes and Colors Available 9 .........................................................................................................................................................
1.2 EVF Front-Loaded Series 9 ................................................................................................................................................................
1.3 EVH Horn-Loaded Series 9 ................................................................................................................................................................
1.4 Accessories for EVF and EVH Systems .....................................................................................................................................10
2.0 Tool List ......................................................................................................................................................................................................10
3.0 Designing an EVF/EVH Cluster 11 .................................................................................................................................................................
3.1 General Aiming and Placement Guidelines 11 ..............................................................................................................................
3.2 Choosing between the EVF Full-Range and EVH Full-Range Systems 11 ............................................................................
3.21 Directivity Break Frequency Defined 11 ........................................................................................................................
3.3 More on Coverage Patterns, Multiple Coverage Patterns, the Need for Clusters of
Loudspeakers and How Far a Single Cluster Can “Reach” into a Venue 12 .........................................................................
3.31 Basic Clustering Guidelines 12 ......................................................................................................................................
3.4 Coverage-Uniformity Target 13 .........................................................................................................................................................
3.5 Multiple-Source Interference in Clusters 14 ..................................................................................................................................
3.51 Reducing Multiple-Source Interference 16 ..................................................................................................................
4.0 Preparing EVF and EVH Systems for Installation 19 ...................................................................................................................................
4.1 Recommended Preflight Procedures 19 .........................................................................................................................................
4.2 Passive/Biamp Crossover Configuration 19 ..................................................................................................................................
4.3 Rotation of High-Frequency Waveguides (EVF Systems) 20 ....................................................................................................
4.4 Rotation of High-Frequency Waveguides and Mid-Frequency Waveguide
Contours (EVH Systems) 20 ..............................................................................................................................................................
4.5 Digital Signal Processing 21 ..............................................................................................................................................................
4.51 Full-Range Systems in Passive Mode 21 .....................................................................................................................
4.52 Using the EVF-1121S and EVF-1151S Low-Frequency Systems in Full-Range
Clusters that Operate on a Single Power-Amplifier Channel 22 ............................................................................
4.53 DSP (Digital Signal Processor) Loudspeaker Presets for Biamp Operation 22 .................................................
5.0 EVF and EVH Rigging System 23 ....................................................................................................................................................................
5.1 Introduction 23 ......................................................................................................................................................................................
5.11 The Flying EV-Innovation (EV-I) Loudspeaker System 23 ........................................................................................
5.12 Important Details that Apply to the VRK and HRK Rigging Kits 26 .......................................................................
5.2 EV-I Rigging Primer 26 ........................................................................................................................................................................
5.21 Anatomy of an EVF or EVH Flying System Using M10 Eyebolts ....................................................................... 27
5.211 Eyebolt Application Warnings ................................................................................................................. 27
5.212 Eyebolt Installation 28 .....................................................................................................................................
5.213 All-Eyebolt Clusters 29 ...................................................................................................................................
5.22 VRK Kits and Vertically Rigged Clusters 31 ................................................................................................................
5.23 HRK Kits and Horizontally Rigged Clusters 32 ..........................................................................................................
5.24 Assembly Instructions for VRK and HRK Kits 35 .......................................................................................................
6.0 Rigging-Strength Ratings and Safety Factors .........................................................................................................................................37
6.1 Working Load Limit and Safety-Factor Definitions ..................................................................................................................37
6.2 Structural-Rating Overview .......................................................................................................................................................... 38
6.3 All-Eyebolt Structural Ratings ...................................................................................................................................................... 39
6.31 Working Load Limits for Eyebolts ............................................................................................................................. 40
6.32 Suspension-Line Angles 41 .............................................................................................................................................
6.33 Left-to-Right All-Eyebolt Cluster Angles 41 ................................................................................................................
6.4 VRK Rigging Structural Ratings for Vertical Clusters 42 ............................................................................................................
6.41 Working Load Limits for Eyebolts used with VRK Vertical Rigging Kits .......................................................... 44
6.42 Left-to-Right Vertical Cluster Angles 45 .......................................................................................................................
2
Electro-Voice EVF/EVH User Manual
Rigging-Safety Warning
3
This document details general rigging practices appropriate to the entertainment industry, as they would apply to the rigging
of Electro-Voice EVF and EVH loudspeaker systems. It is intended to familiarize the reader with standard rigging hardware and
techniques for suspending EVF and EVH loudspeaker systems overhead. Only persons with the knowledge of proper hardware
and safe rigging techniques should attempt to suspend any sound systems overhead. Prior to suspending any
Electro-Voice EVF and EVH loudspeaker systems overhead, it is essential that the user be familiar with the strength
ratings, rigging techniques and special safety considerations outlined in this manual. The rigging techniques and practices
recommended in this manual are, of necessity, in general terms to accommodate the many variations in loudspeaker clusters
and rigging configurations. As such, the user is expressly responsible for the safety of all specific EVF and EVH
loudspeaker cluster designs and rigging configurations as implemented in practice.
All the general rigging material contained in this manual is based on the best available engineering information concerning
materials and practices, as commonly recognized in the United States, and is believed to be accurate at the time of original
printing. As such, the information may not be directly applicable in other countries. Furthermore, the regulations and
requirements governing rigging hardware and practices may be superseded by local regulations. It is the responsibility of the
user to ensure that any Electro-Voice loudspeaker system is suspended overhead in accordance with all current federal, state
and local regulations.
All specific material concerning the strength ratings, rigging techniques and safety considerations for the EVF and EVH
loudspeaker systems is based on the best available engineering information concerning the use and limitations of the
products. Electro-Voice continually engages in testing, research and development of its loudspeaker products. As a result, the
specifications are subject to change without notice. It is the responsibility of the user to ensure that any
Electro-Voice loudspeaker system is suspended overhead in accordance with the strength ratings, rigging techniques and
safety considerations given in this document and any manual update notices. All non-Electro-Voice associated hardware items
necessary to rig a complete EVF and EVH loudspeaker cluster (chain hoists, building or tower supports and miscellaneous
mechanical components) are the responsibility of others.
Electro-Voice
June 2010
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 .................................................................................................................... 48
6.53 Symmetry for Horizontal Clusters using HRK Kits ............................................................................................... 49
6.54 Inner Connection Points ............................................................................................................................................. 50
6.55 Left-to-Right Horizontal Cluster Angles .................................................................................................................. 50
6.6 Ratings for Outdoor Applications with Wind Loading 51 ...........................................................................................................
6.7 Electro-Voice Structural-Analysis Procedures 51 .........................................................................................................................
7.0 Rigging Inspection and Precautions 52 ...........................................................................................................................................................
8.0 Installation Instructions TK150.. 53 ..................................................................................................................................................................
8.1 Transformer Ratings ....................................................................................................................................................................... 54
8.2 Approvals and Certifications ........................................................................................................................................................ 54
9.0 Refrences......................................................................................................................................................................................................... 55
9.1 Rigging (Printed) 55 .............................................................................................................................................................................
9.2 Mechanical Engineering (Printed) 55 ...............................................................................................................................................
9.3 Rigging (Websites) 55 ........................................................................................................................................................................
Electro-Voice EVF/EVH User Manual
1.0 Introduction
The Electro-Voice series is a group of compact two-way front-loaded full-range systems, available EVF
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-inch exit/3-inch dia-
phragm compression driver. Both compression drivers have neodymium magnetic structures. In general,
the premium components in the “D” versions provide lower distortion and reduced power compression.
The series is a group of larger two-way horn-loaded full-range systems. Both the “S” and “D” EVH EVH
versions use SMX low-frequency transducers. The “D” versions substitute the DH7N large-format com-
pression driver for the ND2B medium-format driver.
All full-range systems utilize high-order crossover networks that seamlessly integrate the low-frequency
transducers with the high-frequency compression drivers, providing very low distortion and excellent fre-
quency response.
The EVF/EVH systems have many threaded rigging points that can be used with the supplied eyebolt kits
or optional suspension kits to easily create a number of horizontal or vertical cluster configurations. All
enclosures in their normal orientations (long axis vertical) share the same height, just over 30 inches (762
mm), promoting attractive clusters. Six coverage patterns, all rotatable, are available in each family, as
shown in Table 1a. The EVF-1121S and EVF-1151S low-frequency systems have integral low-pass filters
that allow paralleling them with up to two full-range systems, offering a cost-effective way to augment the
low-frequency output of EVF full-range systems.
4
The model number scheme denotes the number of woofers, the diameter of the woofers, the number of
band passes in the system, the woofer series used and, following a forward slash, the coverage pattern.
An example is the EVF-1122S/96, which has a single SMX series 12-inch woofer in a two-way configura-
tion and a 90° x 60° pattern. Another example is the EVF-1181S subwoofer, which has a single EVS-18S
18-inch woofer in a “one way” configuration and without a specific coverage pattern (essentially omnidi-
rectional in the very-low-frequency range in which it is usually operated).
Table 1a:
Coverage patterns available in the EVF and EVH series (all rotatable)
Horn Pattern: 40° x 30° 60° x 40° 60° x 60° 90° x 40° 90° x 60° 90° x 90° 120° x 60°
EVF 12-inch ••••••
EVF 15-inch ••••••
EVH ••••••
Electro-Voice EVF/EVH User Manual 5
Typical EVF and EVH systems are shown in Figure 1, with key dimensions, suspension points, weights
and centers-of-gravity. Engineering data sheets for each model, containing full specifications and dimen-
sional drawings, are shipped with each loudspeaker and are downloadable from the Electro-Voice Web
site (www.electrovoice.com).
Table 1b:
Model number scheme, showing the meaning of each individual model number
Model Name
(As Shown) EVF-1122S/96 (example)
Model Name
(Separated) EVF - 1 2 S /12 96
Description
Loudspeaker
Family/Series
(EVF Series)
Number of
Woofers
(1 Woofer)
Woofer
Diameter
(12-inch)
Number of
Band Passes
(Two-Way)
Woofer
Series Used
(SMX Series)
Coverage
Pattern
(90° x 60°)
1.0 Introduction (cont.)
Figure 1a:
Key dimensions, suspension points, weight, and center-of-gravity for EVF-1122 (all coverage patterns)
Figure 1b:
Key dimensions, suspension points, weight, and center-of-gravity for EVF-1152 (all coverage patterns)
Front ViewEnd View Side View Rear View
“S” System Weight -
60.0 lb (27.2 kg)
Front ViewEnd View Side View Rear View
“S” System Weight -
70.1 lb (31.8 kg)
“D” System Weight -
65.5 lb (29.7 kg)
“D” System Weight -
75.7 lb (34.4 kg)
Electro-Voice EVF/EVH User Manual
1.0 Introduction (cont.)
Figure 1c:
Key dimensions, suspension points, weight, and center-of-gravity for EVF-1121S
Front ViewEnd View Side View Rear View
System Weight -
57.7 lb (26.2 kg)
Figure 1d:
Key dimensions, suspension points, weight, and center-of-gravity for EVF-1151S
Figure 1e:
Key dimensions, suspension points, weight, and center-of-gravity for EVF-1181S
System Weight -
62.6 lb (28.4 kg)
Front ViewEnd View Side View Rear View
System Weight -
101.2 lb (46.0 kg)
Front ViewEnd View Side View Rear View
6
Electro-Voice EVF/EVH User Manual
1.0 Introduction (cont.)
Figure 1h:
Key suspension point dimensions for EVF or EVH loudspeakers as indicated in table below
Figure 1g:
Key dimensions for washers and eyebolts included with each loudspeaker
Washer (x4) Eyebolt (x4)
End View Side View Rear View
Table 2:
Key suspension point dimensions as shown in figure above
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] 28.255” [717.68mm] 10°
EVH 3.957” [100.50mm] 13.889” [352.77mm] 23.857” [605.97mm] 26.409” [670.79mm] 10°
8
Electro-Voice EVF/EVH User Manual
2.0 Tool List
Listed below are the tools required to prepare EVF and EVH systems for installation:
1. 3/16-inch flat-blade screwdriver (for attaching signal wires to input-panel connectors).
2. Phillips #2 screwdriver (for grille removal to rotate waveguides, removal of high-frequency
waveguides for rotation, and removal of input panel to install the optional TK-150
70.7/100-volt transformer).
3. 4-mm Allen (hex) wrench (for removal and reorientation of the EVH hard foam
mid-frequency waveguide contours to rotate the mid-frequency coverage pattern).
4. 6-mm Allen (hex) wrench (for working with all rigging points).
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 a
quick-disconnect alternative to the standard Phoenix screw-terminal input connectors.
HRK and VRK: a series of horizontal (HRK) and vertical (VRK) rigging kits that accommodate a number
of horizontal and vertical system aiming angles. See section 5.0 EVF and EVH Rigging System for details.
TK-150: optional 70.7/100-volt transformer kit mounts on the inside of the EVF and EVH input panels,
offering 37.5, 75 and 150 watts at 70.7 volts and 75 and 150 watts at 100 volts. Installation instructions
come with the TK-150.
EVF-UB: optional U-bracket kit for mounting single EVF full-range and low-frequency (not subwoofer)
systems to a wall or ceiling. Installation instructions come with the EVF-UB.
EVI-M10K: optional eyebolt kit, consisting of four M10 shoulder eyebolts and four fender washers, used
when additional eyebolts are needed to suspend loudspeakers. See section 6.3 for details. One EVI-
M10K eyebolt kit is supplied with each loudspeaker system.
EVI-AC: optional access card which allows diagnostic access to the transducers and protection circuitry
inside the enclosure. Use of this accessory does not require any disassembly or disconnections beyond
removal of the plug-in switch card.
10
Electro-Voice EVF/EVH User Manual 15
Figure 5:
Typical response off the array axis of the two loudspeakers shown in Figure 4,
showing cancellations due to arrival-time differences
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 rst several
interference 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 lter” response, after the visual appearance of the
response.
3.0 Designing an EVF/EVH Cluster (cont.)
If one of the null frequencies is chosen and the horizontal polar response is measured, the result is shaped
like the blue polar response in the center lower graph of Figure 6. In this view, the cluster axis points up
(+X). Full output is achieved on this axis, since both signals arrive at the same time. But there are off-axis
problems. While the overall coverage of the cluster is about 120° (6 dB down), two deep nulls occur at
about 20° on either side of the cluster axis.
Figure 6:
Horizontal polar response (blue center
plot) of two closely clustered 60° x 40°
loudspeakers aimed 60° apart, showing
the off-axis nulls at 1,250 Hz caused by
multiple-source interference
(see text for more details)
NORMALIZED
Electro-Voice EVF/EVH User Manual16
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.
3.51 Reducing Multiple-Source Interference
Multiple-source interference cannot be eliminated but it can be substantially reduced. Systems which
have radiating devices large enough to hold their rated coverage angles down to relatively low frequen-
cies, such as the horn-loaded EVH series that hold their coverage angles down to 500 Hz, will exhibit
less interference in clusters. Also, doubling the distance between the two systems of Figure 8 produces
multiple interference nulls which are more densely packed than those of Figure 6, reducing the audibility of
the interference.
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)
3.0 Designing an EVF/EVH Cluster (cont.)
Figure 8:
Horizontal polar response (blue cen-
ter plot) of two 60° x 40° loudspeakers
aimed 60° apart but with double the
distance between grille centers compared
to Figures 6 and 7, showing the more
densely packed 1,250-Hz off-axis nulls
caused by multiple-source interference
(see text for more details)
Electro-Voice EVF/EVH User Manual18
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, showing the smoothing of multiple-source interference caused by a 3-ms delay to one loudspeaker
3.0 Designing an EVF/EVH Cluster (cont.)
In clusters with more than two systems, adjacent boxes are usually delayed. While the effect can be
predicted with appropriate software (such as EASE 4.2), the actual delays are typically established in the
field during system setup and commissioning, by ear and measurements.
Electro-Voice EVF/EVH User Manual 21
4.0 Preparing EVF and EVH Systems for Installation (cont.)
Figure 12:
An EVH hard foam waveguide contour
being removed for reorientation
4.5 Digital Signal Processing
4.51 Full-Range Systems in Passive Mode
For full-range systems in the passive mode, the internal crossover/equalizer network sends low
frequencies to the woofer and high frequencies to the compression-driver/waveguide combination. In
addition, the network tailors the frequency response and levels of each individual driver so that the overall
frequency response of the loudspeaker is essentially flat over its design operating range.
Once a cluster of EVF and/or EVH systems is installed in a venue, a digital signal processor (DSP) will
typically be used to adjust the in-room frequency response, based on the specifics of the situation. In
addition, the DSP should be used to provide the high-pass filters recommended to protect EVF and EVH
systems against overdrive at frequencies below their operating range. Failure to do so could damage the
low-frequency drivers if fed high-level signals below the system’s operating range. Table 3 shows the
recommend high-pass filter frequencies for infrasonic protection of EVF and EVH systems. Different
high-pass filter frequencies are recommended for some fiberglass versions based on changes in operation
range due to the effects of having a sealed enclosure.
Table 3:
Recommended high-pass frequencies for infrasonic protection of EVF and EVH systems
Model(s) Recommended High-Pass Frequency (minimum)
EVF-1122/XX 65 Hz
EVF-1152/XX 45 Hz (55 Hz for Fiberglass Versions)
EVF-1121S 50 Hz (55 Hz for Fiberglass Versions)
EVF-1151S 35 Hz (45 Hz for Fiberglass Versions)
EVF-1181S 33 Hz
EVF-2121S 45 Hz
EVF-2151D 35 Hz
EVH-1152/XX 60 Hz
Electro-Voice EVF/EVH User Manual26
5.12 Important Details that Apply to the VRK and HRK Rigging Kits
Both the VRK and HRK kits include all necessary mounting hardware (as shown in Figures 14 and 15).
Additionally, the VRK kits include a set of low-profile stabilizer bars to both simplify alignment of the enclo-
sures during the rigging process and keep the front edges of the systems neatly aligned. Additional hard-
ware is included in the VRK kits to mount these stabilizer bars. The stabilizer bars mount to the insides of
the vertical rigging plates for a clean appearance. Stabilizer bars can be seen in Figure 14 and, installed,
in Figure 21.
The HRK horizontal rigging kits have a tie plate that is welded to the center of the rigging plate. This tie
plate is for suspending the top systems in a cluster and for suspending lower systems below (with user-
supplied hardware). It has six holes that fit a standard 5/8-inch shackle (user supplied). Tie plates can be
seen in Figure 15 and, installed, in Figure 22.
Both the VRK and the HRK rigging plates use arrow designators and a series of letters by each of the
mounting holes to ensure that the desired angle is achieved. Refer to Tables 5, 6, and 7 for a description
of the appropriate arrow direction and letter.
All rigging plates except the EVF-to-EVF-subwoofer rigging plates are symmetrical, meaning that the
mounting-hole layouts are the same from the left to the right sides of the rigging plate. The EVF-to-EVF-
subwoofer rigging plates are asymmetrical, meaning that one side is for subwoofers, labeled “Sub,” and
the other side is for EVF’s, labeled “EVF.” This rigging plate must be flipped over depending on which side
the subwoofer is on. This asymmetry is shown in Figure 15b.
All user-supplied hardware must be overhead load-rated (using applicable safety factors) for the specific
cluster. See section 6.0 for additional details on load limits and safety factors.
5.2 EV-I Rigging Primer
The following sections describe the clustering of EVF and EVH systems using one of the following three
approaches:
1. EVI-M10K eyebolt kits supplied with each system (used in conjunction with other user-sup-
plied hardware).
2. Optional VRK vertical rigging kits, in conjunction with the supplied eyebolt kits and user-
supplied hardware.
3. Optional HRK horizontal rigging kits, in conjunction with the supplied eyebolt kits and user-
supplied hardware.
In all cases, note that the weight of the cluster can be substantial and the building structure must be ca-
pable of supporting the weight. (System weights are given in Figure 1.)
The optional VRK and HRK rigging kits are the most convenient way to assemble EVF and EVH clusters,
offering a great deal of flexibility in box aiming angles. Using the supplied eyebolt kits with additional user-
supplied hardware is more difficult, but does allow the most flexibility, since not only can box aiming angles
be determined but also the boxes can be rotated about their aiming axes, which can improve coverage
uniformity in certain venue shapes (EASE 4.2 allows this option).
5.0 EVF and EVH Rigging System (cont.)
Electro-Voice EVF/EVH User Manual 29
5.213 All-Eyebolt Clusters
A basic two-cabinet ying system is shown in Figures 19 and 20, illustrating the components necessary
to make a typical two-system horizontal or vertical cluster using M10 eyebolts. Secure cabinets to the
building structure with user-supplied hardware. All user-supplied hardware, shackles, wire rope, bolt
connectors, etc., must be rated for overhead lifting. Refer to section 1 for suspension point locations.
A second enclosure may be suspended from the rst by using the same M10 rigging points on the second
enclosure. Connection between the two enclosures through the M10 eyebolts requires hardware supplied
by the end user. All user-supplied hardware must be rated for overhead lifting. The angle between the
two enclosures as well as the angle between the rst enclosure and the structure can be controlled by
the length of the user-supplied hardware. If the desired angle cannot be achieved by varying the length of
this hardware, then pull-back points can be used. It is recommended that both the top and the second box
use a pull back. The pull back can be achieved with the use of additional M10 eyebolts at the back of the
enclosures. The hardware used to achieve the pull back is supplied by the end user.
A MAXIMUM OF TWO ENCLOSURES IS ALLOWED WITH ALLEYEBOLT CLUSTERS.
A MINIMUM OF TWO EYEBOLTS ARE REQUIRED FOR SUSPENSION OF ALLEYEBOLT
CLUSTERS.
Figure 19a:
A two-system vertical cluster
using the eyebolt kit supplied with
each system plus user-supplied
hardware (not shown), using a
moderate trim angle
5.0 EVF and EVH Rigging System (cont.)
Figure 19b:
A two-system vertical cluster
using the eyebolt kit supplied with
each system plus user-supplied
hardware (not shown), using a
more extreme trim angle
Figure 19c:
A two-system vertical cluster
using the eyebolt kit supplied with
each system plus user-supplied
hardware (not shown), using an
extreme trim angle
U-Bracket
Point Only,
Not for
Eyebolt
Suspension!
Electro-Voice EVF/EVH User Manual32
5.0 EVF and EVH Rigging System (cont.)
5.23 HRK Kits and Horizontally Rigged Clusters
The main difference between the HRK and the VRK rigging kits is the addition of a tie plate in the center
of the rigging plate. Tie plates are identied in Figure 22.
MAIN SUSPENSION LINES AND PULL BACKS MUST BE TIED TO THE TIE PLATES.
Enclosures may be suspended below using the HRK rigging kits. Connection between the enclosures
through the tie plates within the HRK kits requires hardware supplied by the end user. All user-supplied
hardware must be rated for overhead lifting. The angle between the two enclosures as well as the angle
between the rst enclosure and the structure can be controlled by the length of the user-supplied hard-
ware. If the desired angle cannot be achieved by varying the length of this hardware, then pull-back points
can be used. It is recommended that both the top and the second box use a pull back. A pull back can be
achieved through the use of attachment to the tie plates. Stabilization can be achieved through the use of
M10 eyebolts at the back of the enclosures. The hardware used to achieve the pull back is supplied by the
end user.
A basic two-over-two cluster is shown in Figure 22.
NOTE THAT THE HRK KITS ARE DESIGNED TO MAKE WEIGHTSYMMETRICAL CLUS
TERS, I.E., THOSE WHOSE LEFTTORIGHT CENTER OF GRAVITY IS IN THE CENTER OF
THE CLUSTER.
The following components are needed to achieve this cluster:
1. Two HRK-1 horizontal rigging kits for EVF to EVF.
2. User-supplied hardware to link the upper cluster to the lower cluster.
Electro-Voice EVF/EVH User Manual 35
5.0 EVF and EVH Rigging System (cont.)
5.24 Assembly Instructions for VRK and HRK kits
Both the VRK and HRK rigging kits share the same mounting hole positions and letter designations.
Tables 5, 6, and 7 apply to both the VRK and HRK kits. The only difference between the kits is the HRK
rigging plates have an integral tie plate and the VRK kits use a stabilizing bar.
1. Refer to Tables 5, 6, or 7 to determine which lettered hole position to use. Follow the
directions in these tables for arrow direction and positioning on the cabinet. Note that
“Front” will always refer to the front of the enclosure (i.e., the grille).
2. HRK kits skip to step 3. For VRK kits, preassemble them using the supplied hardware by
attaching the stabilizer bar to both the large and small rigging plates. Attach the stabilizer
bars to the back side of the plates, using a #2 Phillips screwdriver, the eight M5 pan-head
machine screws and M5 split-lock washers supplied with the hardware kit. You are now
ready to attach the VRK kits to the loudspeakers.
3. Referring to Tables 5, 6 or 7 (depending on which systems are being connected), find which
rigging-plate letter will give you the desired angle. Also pay attention to the arrow direction
as listed in the table.
4. With a 6-mm Allen (hex) wrench, remove the M10 flathead bolts that were installed by the
factory. Remove only those bolts that are going to be replaced by rigging hardware, in order
to remain safe and avoid audible enclosure leaks.
5. Using the appropriately lettered rigging-plate holes, attach the VRK or HRK kits to the
enclosure sides using the eight supplied M10 button-head bolts and split-lock washers.
Use a 6-mm Allen (hex) wrench.
6. Install any M10 eyebolts that are needed for suspension, pull back, or stabilization at this
time.
7. Ensure that all M10 bolt points in the enclosure have an M10 flathead bolt, an M10 eyebolt
or an M10 button-head bolt where the rigging plates attach. Do not hang any cluster with
missing M10 bolts!
8. Check all M10 and M5 fasteners and eyebolts to ensure they are tight.
9. You are now ready to hoist the cluster and make the final attachments to the building
structure.
Electro-Voice EVF/EVH User Manual38
6.0 Rigging-Strength Ratings and Safety Factors (cont.)
6.2 Structural Rating Overview
Designing a safe structural cluster is usually a very complex process best left to experienced profession-
als. Since the EVH and EVF rigging options allow the user to configure a wide variety of clusters, the
following guidelines have been broken into three sections: eyebolts, vertical rigging and horizontal rigging.
Each section will give the end user guidelines for maximum weight and height of clusters. At the end of
each section, typical clusters will be recommended. The following is a short synopsis of the consider-
ations involved.
There are three independent strength ratings that, together with listed maximums, give a complete de-
scription of the overall structural capabilities of the loudspeaker cluster.
1. The strength of each M10-1.5 threaded attachment point in each of the individual enclo-
sures. This is the strength of the M10 corner bracket and the enclosure.
2. The strength of the rigging plates included in the VRK and HRK rigging kits described in
section 5.0 EVF and EVH Rigging System.
3. The strength of the M10-1.5 eyebolts.
Using the three strength ratings listed above, maximum cluster heights and weights will be recommended
so that the cluster maintains an 8:1 safety factor.
In any cluster, the forces acting on each loudspeaker (on each individual rigging point and on the enclo-
sure) and the forces acting on each point of the rigging accessory (M10-1.5 eyebolts, rigging plates and
tie plates) will vary with each cluster configuration. Determining those forces throughout a cluster requires
complex mathematical calculations. Electro-Voice engineers have therefore defined a set of simplified
structural-rating guidelines for both vertical and horizontal clusters that eliminates the need for complex
calculations. The interaction of complex forces throughout EVF and EVH clusters was analyzed using a
combination of destructive testing and computer modeling to develop this set of conservative guidelines,
presented below, to enable a rigger to immediately determine on site whether or not a cluster is safe with-
out having to make weight-distribution calculations.

Specyfikacje produktu

Marka: Electro-Voice
Kategoria: głośnik
Model: EVF-1152D/99

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