EAW KF740P Loudspeaker Owner’s Manual

**EAW KF740P Loudspeaker Owner’s Manual

**

READ THIS FIRST

EC STATEMENT OF CONFORMITY
This document confirms that the range of products of Eastern Acoustic Works bearing the CE
label meet all the requirements in the EMC directive 89/336/EEC laid down by the Member States
Council for adjustment of legal requirements, furthermore the products comply to the rules and regulations referring to the electromagnetic compatibility of devices from 30 August 1995.

The authorized declaration and compatibility certification resides with the manufacturer and can
be viewed upon request. The responsible manufacturer is the company:

Eastern Acoustic Works
One Main St.
Hinesville, MA 01588 USA
Tel: 508-234-6158
Fax: 508-234-8251
E-mail: [email protected]

Hinesville, MA USA

SAFETY PRECAUTIONS
The terms “Caution,” “Warning,” and “Danger” are used throughout this manual to alert the reader
to important safety considerations. If you have any questions about any aspects of precautions, contact your local dealer, distributor, or EAW. The following are the descriptions of the safety precautions.

CAUTION : describes an operating condition or user action that may expose the equipment or
user to potential damage or danger

WARNING : describes an operating condition or user action that will cause damage to the equipment or injure the user

DANGER : describes an operating condition or user action that will immediately damage the equipment or be extremely dangerous or possibly life- threatening to the user.

GENERAL PRECAUTIONS
WARNING : Some aspects of rigging and other related fields for which EAW manufactures, sells, or distributes equipment are potentially hazardous. Any people using this equipment are personally responsible for their own safety. EAW transactions are made with the assumption that the purchaser is a qualified individual or will have only qualified individuals perform work with the equipment. EAW will not be liable for any damages arising from the use of equipment sold to purchaser.

WARNING : Only persons with the knowledge of proper hardware and safe rigging techniques
should attempt to suspend EAW loudspeaker systems overhead. Failure to follow this precaution may result in damage to the equipment, injury, or death.

INTRODUCTION

The KF740 Series is a mid-sized line array system designed to bridge the gap between the popular KF760 and KF730 Series. With output capabilities resembling the KF760 and a footprint s milar to a KF730, the KF740 delivers 3-way, KF Series performance in a flexible, easy-to use system. A full KF740 array can provide uniform sound coverage from directly beneath itself out to hundreds of feet without complex signal processing

This manual provides information about the design, configuration, and operation of KF740 Line Arrays. It is intended to be used in conjunction with EAW Resolution Windows®-based array design software. Please thoroughly familiarize yourself with this manual. The more you learn and understand the KF740 Line Array the easier you will find it to use. This is not so much because of any inherent complexities, but because it is actually easier to use than most, if not all, array systems.

KF740
The KF740 is physically configured for temporary installation. Rigging information for this purpose is provided in this manual

KF740P
The KF740P is physically configured for permanent installation. Full rigging information and
instructions for the KF740P is provided with the KF740P rigging hardware kits. All non-rigging
information provided herein applies to the KF740P.

UNPACKING

CONTENTS
KF740
(1) KF740 loudspeaker
(6) Tethered quick release pins

SHIPPING DAMAGE
After unpacking, if the loudspeaker is found to have shipping damage, save the packing materials for the carrier’s inspection, notify the carrier immediately, and file a shipping damage claim.

Although EAW will help in any way possible, it is always the responsibility of the receiving party to file any shipping damage claim. The carrier will help prepare and file this claim.

RETURNING PRODUCTS TO EAW
If the loudspeaker must be returned to EAW, contact the EAW Service Department for a Return
Authorization (See Chapter 7). Use the original shipping carton and packing materials. If the
shipping carton is damaged, contact EAW for a new carton, for which there will be a small
charge. EAW will not be responsible for damage caused by inadequate packing

KF740 ARRAY DESIGN

EAW RESOLUTION
Use EAW Resolution design software when designing a KF740 array. It can be found in the Downlo ds/Software section of the EAW website (www.eaw.com). Resolution’s primary function is to determine the configuration providing the best vertical performance for a given application. Various venue dimensions are entered that allow Resolution to calculate the resultant array performance. Resolution can automatically generate a suggested array or an end user can tailor a Resolution generated array or build a unique array to view array performance

For complete instructions about operating the EAW Resolution, click on the About/Help menu
when running software

Computer Requirements
Resolution requires an IBM compatible PC with Windows ® XP, or Vista 32 bit operating systems. It is not designed to work with Macintosh® operating system

Resolution Results

• Graphical representations of the array and the venue
• Aiming splay angle between each pair of enclosures
• How to set the enclosure-to-enclosure rigging
• On-axis aiming angle for each enclosure as a difference from 0° horizontal
• Various angles and throw distances calculated from the venue’s dimensions
• Difference between the array beamwidth angle and the needed coverage angles
• Height of the array and trim height to the bottom of the array from the floor
• Pick Point on the Fly-Bar to achieve the calculated array angle when suspended
• Weight of the array

FILL COVERAGE
Up-Fill
Some applications, such as theaters and small arenas, can require up-fill coverage from the
array. In this case, the array is designed to tilt back for up-firing coverage from the topmost
enclosures

Down-Fill
Many applications require extreme down-fill coverage. In this case, the array is designed to have
enough curvature for the bottom KF740 to provide coverage almost directly beneath the array.

Horizontal Coverage and Side-Fill Arrays
Regardless of the length of the array, a KF740 array has a horizontal beamwidth (-6 dB points) of approximately 90°, with pattern control maintained to a very low frequency

KF740 Series as Side-fill Arrays
KF740 side fill arrays can be hung adjacent to the mains, extending the coverage 180° for side audience coverage

GROUND STACKING
Normally, a ground-stacked KF740 main array is used where suspension is not possible, too difficult, or too time consuming. Additional uses are as stage side fills and audience front fill.

Two (2) units are recommended for a minimum ground stack not to exceed six (6) units.

WARNING: Ground-stacked arrays, especially the maximum recommended arrays, requires
assembly by personnel qualified to ensure adequate stability from tip over for the particular
application. See Section 6 for correct array assembly. Mechanical assistance will be required to
lift and position enclosures for arrays taller than approximately 5 feet.

SUB WOOFERS
General Considerations
Although the impressive low frequency performance of KF740 Series arrays allows them to be
used without subwoofers for some events, subwoofers will normally be used for live musical
performances. The recommended subwoofer is EAW’s SB1001/1002.

A general recommendation is to use KF740 loudspeakers and SB1001/1002 sub woofers in a
ratio of two KF740 loudspeakers to one SB1001/1002 sub woofer

NOTE : Bass performance is often highly program or venue-dependent, as well as subjective as to quantity and quality. For this reason the type, quantity, and disposition of subwoofers may vary considerably with the application. The quantity recommendations below are for general purposes, providing a balanced system for most music applications. Quantities may need to be adjusted up or down for specific situations.

Other Sub woofers
Other sub woofers, such as the Raw’s SB1001, SB1002, or BH760 can also be used with KF740s. Recommended quantities of KF740 for each sub woofer are:

Signal Delay on Subwoofers
Because subs are not flown in the same array as the KF740 it will usually be necessary to
determine the signal delay settings by measurement.

ARRAY OPERATION

OVERVIEW
The operation of a KF740 Series system involves:

1. Understanding the principles on which it operates.
2. How to electronically configure it for a specific task.

ENGINEERING DESIGN
How a KF740 Array works: Divergence Shading
In almost any venue, there are significant differences in distance from the loudspeaker array to
the nearest and farthest audience members. The idea is to turn up the output level of the array
aimed towards the farthest audience members, and then progressively turn it down for audience
members closer to the array. These differences in distance are accompanied by changes in the
array’s vertical aiming angle

Rather than use amplifier input levels, the volume controls for a KF740 array is a combination of the shape of its curvature and the quantity of KF740 units that make up the array. A shallow curve means more loudspeakers are facing a given direction, putting more energy within a given vertical angle. A more radical curvature for the same number of loudspeakers spreads the energy over a wider vertical angle, reducing the energy at any particular point. Simply put, less curvature turns the volume up and more curvature turns the volume down.

If you understand this point, you understand how a KF740 array works. Specifically:

1. More splay at the rear of the enclosures turns the volume up (adds less curvature to the
   array)

2. Less splay at the rear of the enclosures turns the volume down (adds more curvature to the array).

3. More enclosures provide a greater vertical coverage angle.

4. Fewer enclosures provide less vertical coverage angle

RAW Resolution’s the above variables to determine the quantity of enclosures and the variation in curvature along the length of the array that will optimize coverage for the audience distances and angles the array must address.

SIGNAL DIAGRAM
The signal diagram shows the signal flow for a single KF740. An  RAW UX8800 processor is required to provide proper signal processing to drive each section of the loudspeaker.

SIGNAL PROCESSING
Use the EAW UX8800 digital signal processor with the KF740. Each system of KF740 used will require three outputs of a single UX8800. For more information on the UX8800 including EAWPilot software used to control and program the UX8800 from a PC and Grey box per-programmed settings visit www.eaw.com/products/ux8800.html.

WARNING : The KF740 has been optimized for use with the EAW UX8800 processor only. KF740 array performance, in terms of frequency response, beamwidth consistency, output level capability, and wavefront coherency is dependent on the EAW engineered Greybox settings used by the UX8800.

AMPLIFIER GAIN SETTINGS
In order for Divergence Shading to work properly, all amplifiers for all passbands must be set to
the same voltage gain, regardless of their power output ratings. Among other things, equal
amplifier gains are required to maintain array coherence throughout the venue.

NOTE : This does NOT mean the same input sensitivity, but the same input to outputting. Consult your amplifier manufacturer if this cannot be readily determined. Do not selectively boost or attenuate loudspeaker levels at the amplifiers in order to achieve consistent SPL at various distances. This is achieved by adjusting the array curvature as described above

USER ADJUSTMENTS
Equalization
EAW recommends that 1/3 octave or careful use of parametric equalization be used to modify
performance to accommodate a particular program, venue characteristics, or personal taste

Array Measurements
It is recommended to use a multi-channel measurement software platform to investigate the interaction between an array and the acoustical characteristics of a venue. This is a fast, yet sophisticated, process that will indicate problem areas due to particular venue characteristics. Usually it is a matter of applying small amounts of 1/3 octave or parametric equalization to adjust significant anomalies.

AMPLIFIER POWER REQUIREMENTS
As is true of all professional loudspeaker systems, the performance of the KF740 depends on amplifiers delivering an adequate supply of clean power. Determining the appropriate power amplifier wattage for a given loudspeaker and application is a subject of some debate. In fact, there are three distinct issues regarding amplifier power as discussed in the next sections: “Power Ratings,” “Selecting an Appropriate Amplifier Size,” and “Operating Limits.”

For more information on selecting amplifiers, please consult the Frequently Asked Questions
(FAQ) portion of the EAW web site, EAW’s Technical Paper on Amplifier Power also available on the EAW web site; or contact EAW Applications Support Group.

Power Ratings
The KF740 is a Tri or Quad amplified loudspeaker depending on the end users preference, requiring power for two LF, one MF, and one HF amplifier channel. LF sections can be connected in parallel to a single amplifier channel or each can be connected to a separate amplifier channel. The following tables list the rms voltage limits for the KF740.

NOTE : The rms Voltage Limit listed for each sub-system (LF, MF, or HF) is the same for any
enclosure quantity. The wattages are calculated using the Voltage Limits and the overall nominal impedance for the each listed quantity of KF740 loudspeakers.

CAUTION : The rms voltage limits listed above are related to the thermal limits determined from Raw’s standard power test. In this test, transducers are “exercised” to a point of damage or
failure. The test signal has a 6 dB crest factor (peak to average ratio). A maximum continuous
voltage limit for the loudspeaker is then determined based on the test results and on the
transducer’s application in the loudspeaker. The powers listed in the table are calculated as the
square of the rms voltage limit divided by the sub-system’s nominal impedance (Z) in ohms

Selecting an Appropriate Amplifier Size
The wattages listed in the above charts are intended primarily as points of comparison with the
power ratings of other loudspeakers. For this purpose, each wattage listed should be considered
as a +/-1 dB range = 0.8 to 1.25 times the wattage listed. For example, 700 W should be
considered as a range from approximately 550 W to 900 W.

In many applications, the wattages listed will NOT correspond to the best amplifier sizes for optimizing loudspeaker reliability and performance. Proper amplifier selection requires a considered analysis for the particular application. Amplifiers should be sized according to both the sound levels required and the type of audio signals that will be reproduced. If you are unsure of how to determine these parameters, consult a qualified professional or contact EAW’s placation  Support Group

Selecting an Appropriate Amplifier Size Rule Of Thumb
If a KF740 Line Array is used for professionally operated concert applications, a rule of thumb can be applied. Where the full output capabilities of the loudspeakers may be needed to achieve appropriate acoustic output levels, EAW recommends amplifiers with power ratings up to twice the wattages listed in the above charts. This provides a peak voltage capability of 6 dB above the
specified rms voltage limit. This assumes the audio signals will have a peak to average ratio in ex ess of 6 dB, which is usually, but not always, true. Under this condition, the thermal limits are unlikely to be exceeded. While this rule of thumb is consistent with the EAW’s tetrameters, it does NOT guarantee trouble-free operation. That is discussed under “Operating Limits.”

WARNING : The power amplifier sizes recommended by the above rule of thumb are capable of
continuous output levels that can cause damage to or failure of the transducers. Exercise caution
in operation to avoid exceeding the specified maximum rms voltage limits.

In some cases, applying this rule of thumb to the power ratings listed in Section 5.7.1, would
indicate impractical amplifier sizes. In such cases, multiple amplifier channels each powering
fewer KF740s would be more practical.

Operating Limits
It is the responsibility of the audio system operator to operate the loudspeakers within their
capabilities. This is the only way to ensure that loudspeakers are not stressed beyond their limits
to the point of damage or failure.

Operation beyond their capabilities usually includes, but is not limited to, one or more of the
following conditions:

Amplifier clipping
Voltage input in excess of the specified rms voltage limit
Peak voltage input in excess of twice the specified voltage limit
Noticeable distortion
Mechanical noise (such as cones bottoming out)

A suitable means for determining these conditions is highly recommended. At a minimum, the
operator should have a meter display calibrated to indicate when the maximum rms voltage limits will be exceeded. This assumes amplifiers are not being driven into clipping at those limits.

INPUT CONNECTIONS
KF740 Input Connections
There are two Neutrik NL8 connectors on the rear of each KF740. These connections are wired in parallel inside of the unit. Use one input to power a system of KF740 loudspeakers and the other to loop through to other units in the system, it does not matter which input is used for either purpose

KF740 INPUT NL8 (each of two)

+ LF Side
PIN 2 +/-| – FL Front
+ FL Front
PIN 3 +/1| – MF
+ MF
PIN 4 +/-| – HF
+HF

KF740P Input Connections
There are two 8-terminal barrier strip connectors on the rear of each KF740P. The connectors are wired in parallel so that the second connector can be used to loop signals to additional KF740s. The connectors accept stripped wire ends or wire lug

RIGGING

KF740  eries arrays can be suspended or ground-stacked. When suspended, the KF740 can be
used in  onjunction with the KF730, KF737, KF760, and KF761 with the use of adapter bars.
This cha ter details how to physically configure KF740 Series arrays. The following are the
recomme ded methods for most situations. Specific situations may require other methods. It is
the user’s  esponsibility to determine the viability and safety for alternate methods and implement them accordingly.

KF740P : The procedures to suspend and ground-stack permanently installed KF740Ps and are
detailed in instructions provided with the KF740P instillation hardware kits. Use those instructions for rigging any KF740P products and their accessories.

NOTE : The ‘P’ version of the KF740 will not mate to ‘P’ versions of any other product.

RIGGING WARNINGS
WARNING : Suspending anything, especially overhead of people, should be done with extreme caution. Always engage the services of a certified professional who is qualified to determine the requirements for and to implement overhead rigging. Only persons with the knowledge of proper hardware and safe rigging techniques should attempt to suspend KF740 Series arrays overhead. Failure to follow these precautions may result in damage to the equipment, injury, or death.

DANGER : When suspending or stacking KF740 loudspeakers, avoid placing any parts of the
body between enclosures, enclosures and Fly-bar, and enclosures and Adaptor- bars. Always use the integral handles to lift or position enclosures. Failure to follow this precaution may result in damage to the equipment, injury, or death.

CAUTION : A KF740 weighs approximately 107 lb / 49 kg. Always use two people or mechanical
assistance to lift a KF740.

IMPORTANT RIGGING NOTE : Each Quick Release Pin, used to attach enclosures together, can be inserted into one of several holes in both the Hinges and Hinge Tubes integral to closures. The particular holes used set the splay angle between the enclosures and thus their aiming. Use the correct holes as determined by Resolution software or as desired by the user.

IMPORTANT TRANSPORTATION NOTE : To avoid damage to the Quick Release Pin handles when transporting, always insert the pins from the inside of the Hinge Tubes. This keeps the Quick Release Pin handles from extending beyond the footprint of the enclosures or Fly-Bar.

SUSPENSION LOAD RATING – WORKING LOAD LIMIT (WLL)
The Fly-Bar has a WLL for suspending a maximum under-hang of sixteen (16) Loudspeakers. The design factor for this rating is 10:1

CAUTION : Different combinations of loudspeakers allowing for a variety of splay angles between units combined with multiple possible Fly-bar hang positions creates unique loading of stresses on structural members in any given array. Some array configurations may not allow for a 10:1 dies n factor for sixteen (16) units. Consult Resolution for specific WLL information for any given array configuration. Always consult Resolution for WLL information when combining the KF740 with KF730 or KF737 and KF760 or KF761 loudspeakers.

FLY-BAR RIGGING RECOMMENDATIONS
WARNING : It is the responsibility of the user to ensure the attachment to the Fly-Bar, the rigging method, and attachment to structure are determined by a certified professional who is qualified to determine the requirements for and to implement overhead rigging.

attachment to the Fly-Bar
The KF740 Fly-Bar design permits several methods of attachment.

1. Center Holes:
   • Use one of these holes for single point attachment, the particular hole being dictated by Resolution to result in the correct array tilt angle.
   • Use one hole in the rear and one in the front for bridling to a single point.
   • Use one hole in the rear and one in the front to attach two chain motors.
2. Side Hoisting Points:
   • Use each side-to-side pair to bridle to a single point or for attaching two chain motors.

Rigging Methods
The two recommended rigging methods are:

1. Employ one chain motor by attaching to a particular Center Hole dictated by Resolution, or two
   chain motors on the side components of the fly-bar in the holes dictated.

   • This will automatically result in the correct array tilt angle when all enclosures are flown.
   • One motor may be easier to deploy than two.

2. Employ two chain motors, one attached to the front of the Fly-Bar and the second to the rear.

   • The attachment can be to the Center Holes

   • The array will be easier to assemble because it allows tilting the enclosures already
     suspended to better match the angle of the next enclosure to be attached.

   • Once assembled, the overall tilt angle for the array can be easily adjusted.

ATTACHING ENCLOSURES TO THE FLY-BAR
Splay Angles
The splay angles required between each enclosure to achieve the desired array curvature are set
by the integral rigging hardware. The hardware consists of square Hinge Tubes each with a
sliding Hinge on each corner of the enclosure.

Quick Release Pins
Each KF740 is supplied with six tethered Quick Release Pins. Four are used for attaching enclosures together or to the Fly-Bar. Two are used as locking pins for the rear Hinges. See “Locking Pins” Section 6.4.5.

Hinge and Hinge Tube Holes
DANGER : Ensure each Quick Release Pin used in assembling an array is fully inserted and engaged into the Hinge Tubes and Hinge holes. Only use the Quick Release Pins supplied or equal. Pins of different lengths, diameter, or materials will compromise the structural integrity of the rigging system and may result in damage to the equipment, injury, or death

The Hinges and Hinge Tubes,  located on four corners of each enclosure, have several holes for inserting the Quick Release Pins to attach enclosures together or to the Fly-Bar. The particular holes used will determine the splay angles between the loudspeaker aiming axes. The rear splays required for these splay angles and the Hinge and Hinge Tube Holes to use to achieve them are designated by Resolution

KF740 to Fly-Bar

Rear Hinge Hole| Rear Hinge Tube Hole| Front Hinge Hole| Front Hinge Tube Hole
0°| 2B| 1A| Upper
3.0°| 2A| 1A| Upper
6.0°| 3A| 1A| Upper
KF740 to KF740 1| |
Front Splay Angle| Rear Hinge Hole| Rear Hinge Tube Hole| Front Hinge Hole
1.5°| 1| A| 2
3.0°| 2| B| 2
6.0°| 2| A| 2
9.0°| 3| A| 2
12.0°| 4| B| 2
18.0° 2| 4| B| 1

NOTES :

1. The front splay angle is the between the aiming axes, not the top/bottom enclosure surfaces.
2. A front splay angle of 18.0° requires two additional Quick Release Pins not supplied with the KF740. Please contact an EAW dealer to obtain additional Pins.

KF740 FLY-BAR HINGE TUBE HOLES

KF740 HINGE AND HINGE TUBE HOLES

Locking Pins
WARNING : Due to the center of gravity with a suspended curved array, any open splays
between enclosures may close up unexpectedly either during array assembly or disassembly. To
prevent this occurrence and possible injury that may result, always use locking pins in the rear
Hinges and Hinge Tubes on each enclosure. When ground stacking, creating splays between
enclosures REQUIRES the use of locking pins to create rear splays

Each KF740 is supplied with six 1.5 in Quick Release Pins. Two of these Pins are intended for use as locking pins. Certain array configurations and array tilts can cause the collapse of any open splays between KF740 enclosures. This is more likely to occur the more the array is curved relative to its length. Locking pins can prevent the occurrence of splay collapse.

Locking pins are inserted in the Hinge Tubes through the hole in the  part of the Hinge that is captive to that Hinge Tube and below the Hinge knuckle. This prevents the Hinge from receding into its own Hinge Tube, which is what happens when the splay between two enclosures collapses.

SUSPENSION PROCEDURES

• It is recommended when rigging an array of KF740 loudspeakers to attach one enclosure at a time.

• Information on rigging KF740 arrays to other EAW line array products can be found in
  section 6.6 of this manual and with the instructions for individual adapter- bars.

• Reverse each procedure to disassemble an array.

DANGER : Ensure each Quick Release Pin used in assembling an array is fully inserted and engaged. Use only the 1.5 inch Quick Release Pins supplied or equal. Quick Release Pins of different lengths or diameter will compromise the structural integrity of the enclosure and Fly Bar rigging system and may result in damage to the equipment, injury, or deat

CAUTION : When attaching Hinges to Hinge Tubes, use the correct holes as determined by the EAW Resolution or by the user-desired angles to achieve the desired splay angle. Failure to follow this instruction can result in poor acoustical performance.

CAUTION : To help prevent personal injury, clear all pallets as soon as they are empty from the
immediate work area

KF740 loudspeakers On KF740 Pallet

1. Move a KF740 Pallet to the rigging location.
2. Slide a KF740 forward on the pallet until the front rigging of the loudspeaker is resting on the lip of the pallet

Attaching a KF740 to the Fly-Bar

1. Rig the FB174 fly-bar to a chain motor(s) using the designated holes on the fly-bar as determined by Resolution.
2. Remove the Quick Release Pins from the top of the enclosure’s Hinge Tubes and lock the rear hinges as described in 6.4.5.
3. Lower the fly-bar onto the rear hinges of a KF740 and pin them.
4. Fully lower the fly-bar onto the KF740 until the front of the fly-bar is resting on the KF740.
5. Extend the front hinges into the Fly-bar and pin them.
6. Lift the array to the working height needed for the next applicable procedure in the following sections.

Attaching KF740 loudspeaker to a KF740 Already Suspended
CAUTION : When attaching Hinges to Hinge Tubes in steps 5 and 10, use the correct holes as determined by Resolution or by the user-desired angles to achieve the desired splay angle. Failure to follow this instruction can result in poor acoustical performance

1. Move a KF740 Pallet so the top rear Hinges of a KF740 are below the rear Hinge Tubes of the bottom KF740 in the array.

2. Remove the Quick Release Pins from the rear of the KF740 on the pallet.

3. Extend the rear hinges of the KF740 on the pallet into the rear hinge tubes in the flown KF740 and lock them with the Quick Release Pins.

4. Lower the array until the rear Hinge Tubes of the bottom suspended KF740 are even with the top of the rear Hinge Tubes of the KF740 on the pallet.

5. Place the Hinges of the KF740 on the pallet into the suspended KF740’s Hinge Tubes.
   NOTE : Bump the array slightly as needed to line up the enclosures so the Hinges slide easily into the Hinge Tubes

6. Lower the array of KF740 loudspeakers slightly until the reaer pin holes are aligned as dictated by Resolution

7. Attach each Hinge to the Hinge Tube by inserting a Quick Release Pin (removed in Step 2) through both.

8. Lift the Array, with the KF740 attached only by its rear Hinges, to a comfortable working height for the next step.
   NOTE : The following two steps require two people

9. The first of two people required to complete the attaching process lifts the front of the
   KF740, rotating it on the attached rear Hinges.

10. The second person slides the KF740’s front Hinges into the suspended KF740’s Hinge
    Tubes.
    CAUTION : When attaching the front Hinges, the normal configuration is tight packing the enclosure fronts unless otherwise indicated by Resolution.
    NOTE : It will usually be necessary to nudge the KF740 enclosure being attached to line up its Hinges with the Hinge Tubes on the suspended enclosure above.

11. Attach each Hinge to the Hinge Tube by inserting a Quick Release Pin (removed in step 7) through both.

12. Repeat Steps 1 to 10 for additional KF740 loudspeakers.

Setting the Tilt Angle for the Entire Array
Normally, the easiest method is to use a chronometer, such as a simple, bubble type angle finder (pictured). More sophisticated, albeit more expensive, electronic cyclometers can also be used.

Place the angle finder against one of the rigging tubes on the face of the uppermost enclosure in the array that can be physically reached. Adjust the angle of the entire array so that the face of this enclosure is set at its prescribed aiming angle listed in Resolution.

ADAPTER BARS
KF740 arrays can be mounted under an array of KF760 or KF761 and above an array of KF730 or KF737 loudspeakers with specially designed adapter-bars available from EAW.

Consult Resolution when designing a mixed KF array to obtain proper splay angles and hardware configurations. Information on building arrays of KF760 and KF761 loudspeakers can be found in the KF760 rigging guide. Information on building arrays of KF730 and KF737 loudspeakers can be found in the KF730/SB730 manual. These documents along with detailed instructions for each adapter bar can be found on the downloads portion of the EAW web site at http://eaw.com/downloads/

taching a KF740 to an AB7674-73
It is recommended to begin the process by attaching the adapter-bar to a KF740 prior to the
KF760 or KF761. Follow steps one (1) through five (5) of section 6.5.2 Attaching a KF740 to the
Fly-Bar.

NOTE : Note that in this application the top portion of the rear hinge will be pinned twice. Pin hole 1 in the AB and hole 4 through the top of the hinge tube

Then mount the AB7674-73 to an array of KF760 or KF761 as though it were a KF760 or KF761
by pinning the adapter-bar into the bottom KF760/761 unit in the array using the four (4) pins
supplied with the adapter bar.

CAUTION : Consult the KF760 rigging guide for all proper safety procedures when rigging an
array of KF760 or KF761 loudspeakers. Rigging a KF760 array and attaching an AB7674-73
adapter-bar with KF740 attached requires at least two people. Improper handling of products or
rigging procedures can cause damage to the product, personal injury, or death.

Attaching a KF730 or KF737 to an array of KF740 loudspeakers
It is recommended to begin the process by attaching the AB7473 adapter-bar to a KF730 or KF737 prior to an array of KF740 loudspeakers. Follow steps one (1) through five (5) of section 6.7.3 in the KF730/SB730 manual to attach a KF730 or KF737 to the AB7473. Follow steps one (1) through five (5) from this manual in section 6.5.2 Attaching a KF740 to the Fly-Bar to attach the AB7473 with KF730 or KF7373 attached to an array of KF740 loudspeakers.

NOTE : Note that in this application the top portion of the rear hinge will be pinned twice. Pin hole 1 in the AB and hole 4 through the top of the hinge tube.

CAUTION : Consult the KF730 manual for all proper safety procedures when rigging an array of KF730 or KF737 loudspeakers. Improper handling of products or rigging procedures can cause damage to the product, personal injury, or death.

GROUND STACKING PROCEDURES
Up to six KF740 loudspeakers may be ground-stacked. Always stack KF740s using the KF740Fly-Bar as a base for the stack.

DANGER : A ground stack of more than six KF740 enclosures may shift the center of gravity making the stack unstable. Failure to follow this warning may result in damage to the equipment damage, injury, or death.

Stacking With the Fly-Bar as the Base
IMPORTANT NOTE : If using the Fly-Bar as the base, all KF740 enclosures and the fly-bar are
stacked upside down.

Use the KF760 Ground Stack kit with the KF740 flybar.

1. Attach KF760 Ground Stack Kit to KF740 fly-bar with hardware included in kit. Kit will
   include four (4) height adjustable legs with feet to be mounted to the front and back of the fly-bar oriented in the opposite direction of loudspeakers when attached to the fly-bar.
   CAUTION : Be sure to consult the directions included with the Ground Stack Kit. Improper handling of products or rigging procedures can cause damage to the product, personal injury, or death.

2. At the desired stacking location, position the KF740 Fly-Bar with Ground Stack Kit on the floor so it is resting on its leveling feet. This will be upside down from its normal orientation for suspension, oriented with the corner hinge Tubes towards the audience.

3. Adjust the leveling feet on the Fly-Bar so the Fly-Bar sits level or at the desired angle. Firmly tighten the nut on each leveling foot against the Fly-Bar pad. Firmly tighten the

Stacking the First Enclosure (Fly-Bar as the base)
CAUTION : When attaching Hinges to Hinge Tubes in step 4, use the correct holes determined by the Resolution or by the user-desired angles to achieve the desired aiming angle. Failure to follow this instruction can result in poor acoustical performance.

1. Lift a KF740 from its pallet and turn it upside down, so the Hinges on the enclosure are
   on the bottom. Position it onto the Fly-Bar so its Hinges line up the Fly-Bar Hinge Tubes.

2. Remove the four or six Quick Release Pins from the Hinges.

3. If they do not drop from gravity, slide the four Hinges of the enclosure down into the
   Hinge Tubes on the Fly-Bar.

4. Attach each Hinge to the Hinge Tube by inserting a Quick Release Pin (removed in Step
   2). Use holes 1-A in the front and 2-B in the rear.

5. Use the handles on the loudspeaker to lift the rear of the enclosure as far as possible and
   insert a Quick Release Pin (removed in step 2) into each of the enclosure’s rear Hinge Tubes as a locking pin.

Stacking Additional Enclosures (Fly-Bar as the base)
CAUTION : When attaching Hinges to Hinge Tubes in step 5, use the correct holes as determined by Resolution or by the user-desired angles to achieve the desired splay angle. Failure to follow this instruction can result in poor acoustical performance

1. Lift a KF740 from its pallet and turn it upside down, so the Hinges on the enclosure are
   on the bottom.

2. Lift the enclosure onto the stack mating the alignment pads and recesses between them.

3. Remove the four Quick Release Pins from the Hinges of the upper enclosure and the
   spare two pins in the lower enclosure.

4. If they do not drop from gravity, slide the four Hinges on the upper enclosure down into
   the Hinge Tubes on the enclosure below it.

5. Attach each Hinge to the Hinge Tube by inserting a Quick Release Pin (removed in Step

9. through both.

6. Use the loudspeakers handles to lift the rear of the enclosure as far as possible and insert a Quick Release Pin (removed in step 2) into each of the enclosure’s rear Hinge Tubes as a locking pin.
7. Repeat steps 1 to 6 for additional enclosures.

SERVICE AND MAINTENANCE

GENERAL SERVICE
For any faults that cannot be field-repaired as noted below, contact the EAW Interdepartmental listed in Chapter 7 to determine the appropriate action. This applies to both warranty and non warranty faults

RIGGING SERVICE
Because of the potential for serious consequences and liabilities due to faulty rigging, contact
EAW to determine the appropriate service solution for any rigging hardware problems

BASIC FIELD TROUBLESHOOTING
Each KF740 has an input panel, internal components and wiring, transducers, and an enclosure.
Troubleshooting for various performance problems usually involves isolating the problem to one
of these areas:

1. Transducers
2. Input panel, internal components, and wiring
3. Enclosure and integral hardware

If no problems can be traced to any of these items, look for problems with external electronics or
cabling. Troubleshooting these items is beyond the scope of this manual.

Transducers
A faulty transducer will usually cause readily audible distortions or other unwanted noises. In
other cases, they may stop functioning. Use your ears and test signals or other sound source to
determine which one is at fault. Normally a faulty transducer requires service or replacement by
EAW.

Input panel, Internal Components and Wiring
Faults with these items will usually cause transducers to stop working or possibly be intermittent. Check that audio signals pass from the input jacks to the transducer terminals. Many faults with this area can be field-repaired.

Enclosures
Enclosure problems, such as loose hardware, faulty joints, or other structural problems, will usually be heard as distinct buzzes, rattles, or other unwanted noises. To test for enclosure problems, use a sine wave signal manually swept on the LF sub-system. The input level should be no more than 6 dB below rated power (equals no more than 1/2 rated voltage). It may be possible to field- repair some enclosure problems.

INSPECTION
In-Use Inspection
Visually inspect all rigging parts and enclosures each time they are used for wear, deformation,
cracks, corrosion, damage, and any other condition that may affect load handling capability.

DANGER : If there is any question about the integrity or capability of any rigging part to perform its intended function, immediately remove it from service for repair or replacement.

Periodic Inspection
Perform complete and thorough inspections on a routine, periodic basis. The interval between
inspections and scope of the inspections will depend on the frequency of system usage and the
conditions of use. This interval must not exceed 1 year.

DANGER : Should any of the below listed types of damage exist, immediately remove the
affected part from service for repair or replacement.

Complete Inspection
A complete inspection should include, but not be limited to, looking for the types of damage or
failures listed in each group:

Rigging Components

1. Bends
2. Breaks
3. Broken parts
4. Corrosion
5. Cracks
6. Cracks in welded joints
7. Deformation
8. Denting
9. Wear
10. Loose parts or fasteners
11. Missing parts or fasteners
12. Binding Hinges, Hinge joints or Hinge Tubes

Loudspeaker Enclosures

1. Cracks or breaks in the wood
2. Cracks or bends in the covers

Fly-Bar

1. Bends
2. Cracks
3. Cracked welds
4. Worn spots

Connecting Pins

1. Out-of-roundness
2. Plunger binding or other improper operation
3. Loss of plunger spring action
4. Missing ball bearings

Caster Pallets

1. Cracks or breaks in the wood
2. Bent wheels
3. Wheels that bind when swiveled or rolled
4. Damaged tire

MAINTENANCE
Performance Testing
Listening tests and/or formal measurements should be done periodically. The interval between such tests will depend on the frequency of system usage and the conditions of use. Transducers should be tested for functionality and proper performance. A sine wave sweep at approximately 10% of rated power will usually reveal transducer and/or enclosure problems in the form of distortion, buzzes, or rattles.

Cleaning
Clean the exterior surfaces of the enclosures as required, using a damp cloth to remove any dust
or dirt. After cleaning, use a clean dry cloth to remove any excess moisture.

CAUTION : To avoid damaging the exterior finishes do not use cleaning solvents or abrasives.

Cosmetic Field Repairs
While the enclosure paint finish and wood is of high quality and durability, mars, marks, and other blemishes will likely appear from normal use. For touch up paint and procedures, contact the Application and Support Group for a Sherwin Williams part number for paint needed and instructions for its application. Otherwise, use the closest match to this paint from a local Sherwin-Williams dealer. For cosmetically damaged wood, use common woodworking methods and materials as appropriate for the damage.

CONTACTING EAW

We have tried to answer any questions you may have about the KF740 in this manual. Should
you need further assistance, please do not hesitate to contact us. You can contact us in several
different ways

OPERATING QUESTIONS AND SERVCICE INFORMATION
For questions about configuring or operating the loudspeakers, contact: EAW Applications Support Group

Tel 508-234-6158
Tel 800-992-5013 (USA only)
Fax 508-234-8251
e-mail [email protected]

GENERAL
For all other information:
Mail Eastern Acoustic Works
One Main Street
Whitinsville, MA 01588 USA
Tel 508-234-6158
Tel 800-992-5013 (USA only)
Fax 508-234-8251
Web Site http://www.eaw.com
e-mail [email protected]

References

• Documentation - EAW: Eastern Acoustic Works
• EAW: Eastern Acoustic Works | High-performance, professional loudspeaker system design and manufacturer
• Manual-Hub.com – Free PDF manuals!

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