Eaw KF740, KF740P User Manual

KF740 LOUDSPEAKER

OWNER’S MANUAL

Including KF740P

Page 2 of 22 KF740 OWNER’S MANUAL

TABLE OF CONTENTS

READ THIS FIRST................................................................................................................4

1.

1.1 EC Statement Of Conformity.............................................................................................4

1.2 Saftey Precautions ............................................................................................................4

1.3 General Precautions..........................................................................................................4

2. INTRODUCTION...................................................................................................................5

2.1 KF740................................................................................................................................5

2.2 KF740P..............................................................................................................................5

3. UNPACKING.........................................................................................................................5

3.1 Contents ............................................................................................................................5

3.2 Shipping Damage..............................................................................................................5

3.3 Returning Products to EAW...............................................................................................5

4. KF740 ARRAY DESIGN .......................................................................................................6

4.1 EAW Resolution.................................................................................................................6

4.2 Fill Coverage......................................................................................................................6

4.3 Ground Stacking................................................................................................................6

4.4 Subwoofers........................................................................................................................7

5. ARRAY OPERATION............................................................................................................8

5.1 Overview............................................................................................................................8

5.2 Engineering Design...........................................................................................................8

5.3 Signal Diagram..................................................................................................................8

5.4 Signmal Processing...........................................................................................................8

5.5 Amplifier Gain Settings......................................................................................................9

5.6 User Adjustments ..............................................................................................................9

5.7 Amplifier Power Requirements..........................................................................................9

5.8 Input Connections............................................................................................................11

6. RIGGING.............................................................................................................................12

6.1 Rigging Warnings............................................................................................................12

6.2 Suspension Load Rating – Working Load Limits (WLL)..................................................12

6.3 Fly-bar Rigging Recomedations......................................................................................12

6.4 Attaching Enclosures to the Fly-Bar................................................................................13

6.5 Suspension Procedures ..................................................................................................16

6.6 Adaptor Bars....................................................................................................................17

6.7 Ground Stacking Procedures ..........................................................................................18

7. SERVICE AND MAINTENANCE.........................................................................................20

7.1 General Service...............................................................................................................20

7.2 Rigging Service................................................................................................................20

7.3 Basic Field Troubleshooting............................................................................................20

7.4 Inspection ........................................................................................................................20

7.5 Maintenance........................................................................................................................21

CONTACTING EAW ...........................................................................................................22

8.

8.1 Operating Questions and Service Information ................................................................22

8.2 General............................................................................................................................22

Page 3 of 22 KF740 OWNER’S MANUAL

1. READ THIS FIRST

1.1 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.
Whitinsville, MA 01588 USA
Tel: [phone]
Fax: [phone]
E-mail: [e-mail]

Whitinsville, MA USA

1.2 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 these
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.

1.3 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.

Page 4 of 22 KF740 OWNER’S MANUAL

2. 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
similar 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.

2.1 KF740

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

2.2 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.

3. UNPACKING

3.1 CONTENTS

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

3.2 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.

3.3 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 OWNER’S MANUAL Page 5 of 22

4. KF740 ARRAY DESIGN

4.1 EAW RESOLUTION

Use EAW Resolution design software when designing a KF740 array. It can be found in the
Downloads/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.

4.1.1 Computer Requirements

solution requires an IBM compatible PC with Windows ® XP, or Vista 32 bit operating systems.

Re
It is not designed to work with Macintosh® operating systems.

4.1.2 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 enclosu re as a difference from 0° horizontal
 Various angles and throw distan ces calculated from the venue’s dimensions
 Difference between the array beamwidth angle a nd 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

4.2 FILL COVERAGE

4.2.1 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.

4.2.2 Down-Fill

Many appli
enough curvature for the bottom KF740 to provide coverage almost directly beneath the array.

4.2.3 Horizontal Coverage and Side-Fill Arrays

ardless of the length of the array, a KF740 array has a horizontal beamwidth (-6 dB points) of

Reg
approximately 90°, with pattern control maintained to a very low frequency.

4.2.4 KF740 Series as Side-fill Arrays

KF740 si
audience coverage.

cations require extreme down-fill coverage. In this case, the array is designed to have

de fill arrays can be hung adjacent to the mains, extending the coverage 180° for side

4.3 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.

Page 6 of 22 KF740 OWNER’S MANUAL

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.

4.4 SUBWOOFERS

4.4.1 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 subwoofers in a
ratio of two KF740 loudspeakers to one SB1001/1002 subwoofer.

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.

4.4.2 Other Subwoofers

Other
KF740s. Recommended quantities of KF740 for each subwoofer are:

4.4.3 Signal Delay on Subwoofers

Because subs are
determine the signal delay settings by measurement.

subwoofers, such as the EAW’s SB1001, SB1002, or BH760 can also be used with

Model Subwoofer KF740

SB1001/1002 1 2

BH760 1 3

not flown in the same array as the KF740 it will usually be necessary to

KF740 OWNER’S MANUAL Page 7 of 22