EAW KF750, KF755, KF940, KF750F Technical Specifications

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TECHNICAL SPECIFICATIONS KF750F

DESCRIPTION

The KF750F 3-way triamplified full range system contains
many new EA W technologi es that make it a powerful con cert
touring sound reinf or cem en t tool. I ts A cousti c Sin gularity™
design align s the three subsystems alon g a single axis so the
KF750 acts as a true point source , greatly red ucin g temporal
smearing of staccato events and improving overall clarity
and impact.

Since the large mid frequency horn contains both the high
and low frequency subsystem s, the overall pack age is just 31
in. high. Still, the KF750F provi des consistent wi deband pat­tern control in both the vertical and horizontal planes.

The LF subsystem includ es two vented 12-in woofers mounted
in the MF horns upper and lower walls as a Dipolar Array™.
This Dipolar Array extends vertical directivity well into the
LF passband to minimize midbass build up below the array.

The large MF horn loads a speci ally d esigned 10-in mi dr ang e
cone whose geometry exactly matches the rear of its phase
plug assembly . By developing th e driver an d phase plug as a
single unit, pathlength discontinuities within the MF
passband have been eliminated without compromising the
directional qu alities o f the sour ce as all previ ous phase plug
designs have.

The 2-in exit/100mm voice coil HF compression driver is
mounted on a 35 x 35 constant directivity horn mounted
coaxially within the MF horn flare.

The KF750F’s 15°-per-side trapezoidal enclosur e features eight
4-position flytracks (four each front and rear) that accept
industry-standard flyclips.

APPLICATIONS

The KF750F is design ed to create arr ays with optimized cov­erage in both the horizontal and vertical planes to cover
audience areas ranging from 200 to 80,000 people.

At just 31-in tall and 190 lb . per m odule, KF750F arrays will
be smaller , lighter , m ore efficient and, th er ef or e , m or e pow­erful than those built with other systems. These smaller,
lighter arrays are easier to fly, require less truck space and
permit more open sight lines to cover any given venue.

The KF750F works with a companion downfill module, the
KF755F to provide full range nearfield coverage below the
array. When KF755’s are either not available or not desired,
the KF750F’s smooth power response produces remarkably
even SPL levels throughout the cover age area, allowin g it to
be used for nearfield coverage when necessary.

Applications include:

Concert Tours
Performing Arts Centers
Theaters

DESCRIPTIVE DATA

Configuration 3-Way, Full Range

Powering Triamplified (MX8600 Processor)

LF Subsystem 2x 12-in Cones,

Dipolar Array, Vented

MF Subsystem 10-in Cone, Radial Phase Plug,

Horn-Loaded

HF Subsystem 2-in Exit/100mm Voice Coil

Compression Driver on CD Horn

Cabinet Type (shape) Trapezoidal

Enclosure Materials Baltic Birch Plywood

Finish Black Polyurethane

Connectors 2x Neutrik NL8 Speakon

Suspension Hardware 8x 4-Position Flytrack

(4 each front and rear)

Grill Powder Coated Perforated Steel,

Foam Backed

Dimensions inches millimeters

Height 31.00 787

Width (Front) 27.00 686

Width (Rear) 8.78 233

Depth 34.00 864

Trapezoid Angle 15 degrees per side

Weights pounds kilograms

Net Weight 190 86.5

Shipping Weight 200 91.0

Companion Systems

Sub Bass SB850R/SB1000e/KF940

Full Range Downfill KF755F

Options KF700 Series Caster Pallet

EASTERN ACOUSTIC WORKS

One Main Street, Whitinsville, MA 01588 • (508) 234 - 6158 • FAX (508) 234 - 8251 • Email [e-mail] • Web http://www.eaw.com
EAW products are continually improved. All specifications are therefore subject to change without notice. • PUB# KF750F-888048 (A)/2 pp/1/29/99 • Printed In USA

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TECHNICAL SPECIFICATIONS KF750F

DIMENSIONAL DRAWING

KF750F

NOTES:

1. SYMB OL INDICA TES CENTER OF
BALANCE. TBD

2. SYMB OL INDICA TES FLY TRA CK

MOUNTING POINTS.

3. WEIGHT APPROX: 200 LBS.

4. SHIPPING WEIGHTAPPROX: 220 LBS.

27.00

31.00

GRILL PARTIALLY
SHOWN

FRONT

510741 (B)
exp 11/17/98 jfs

7.28

10.87

34.00

27.80

4.50

6.44

VIEW A-A

DIMENSIONS APPLY

TO BOTH SIDES

(8.78)

DIMENSIONS APPLY

TO TOP AND BOTTOM

3.00

INPUT

30°

TOP

7.75

C

L

3.63

A

C

L

BACK

NOMINAL DATA

Frequency Response (1 Watt @ 1m)

±3 db 48 Hz to 18 kHz

-10 dB 30 Hz

Axial Sensitivity (dB SPL, 1 Watt @ 1m)

LF 103
MF 109
HF 116

Impedance (Ohms)

LF 2x 8
MF 8
HF 8

Power Handling, AES Standard (Watts)

LF 1200
MF 400
HF 200

Calculated Maximum Output (dB SPL @ 1m)

LF Peak/Long Term 139.8/133.8
MF Peak/Long Term 141.0/135.0
HF Peak/Long Term 145.0/139.0

Nominal Coverage Angles, -6 dB points (degrees)

Horizontal 35

Vertical 35

Recommended High-Pass Frequency (24 dB/Octave)

35 Hz

4.00

ARCHITECTURAL SPECIFICATIONS

The three-way full ran g e lou dspeak er system s shall incorpo­rate 2x 12-in LF transd ucers, a 10-in MF con e transd ucer and
a 2-in exit/100mm voice coil compression driver HF trans­ducer.

The LF drivers shall be moun ted in a vented enclosur e tuned
for optimum low frequency response and separated verti­cally to produce off-axis cancellation at a tuned frequency.
The MF driver shall be mounted on a large-format horn and

A

shall be coupled to a phase plug whose geometry exactly
matches that of th e d river. Th e HF driver shall be loaded on
a constant directivity h orn with a nomin al cover ag e pattern
of 35° (h) x 35° (v).

System frequency response shall vary no more than ±3 dB
from 48 Hz to 18 kHz measured on axis. The loudspeaker’s
subsystems (LF/MF/HF) shall produce Sound Pressure Level

6.63

(SPL) of 103/109/116 dB SPL on axis at 1 meter with a
power input of 1 Watt, and shall be capable of producing a
peak output of 139.8/141.0/145.0 dB SPL on axis at 1 meter .
The subsystems (LF/MF/HF) shall handle 1200/400/200 W atts
of amplifier power (AES Standard) and shall have nominal
impedances of 2x 8/8/8 Ohms.

The loudspeaker enclosure shall be trapezoidal in shape. It
shall be constructed of 15mm thi ckness void-free cr oss-grain­laminated Baltic Birch plywood and shall employ extensive
internal bracin g. It shall be finished in black catalyzed poly­urethane. Input connector shall be a Neutrik NL8 with an
additional NL8 provided for connect through. A total of
eight 4-position flytracks (4 each front and rear) shall be
provided . The fr ont of th e loudspeak er shall be cover ed with
a powdercoated perforated steel grill.

The three-way full range loudspeaker systems shall be the
EAW model KF750F.

Acoustic Performance Partnership Eastern Acoustic Works KF750F

One Main Street, Whitinsville MA, 0158 8 USA • Phone [phone] • Toll Fr ee 800/992-5013 • Fax [phone] • Web http://www.eaw.com • email [e-mail]

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FREQUENCY RESPONSE

0

0

)

PERFORMANCE SPECIFICATIONS KF750F

120

KF750F Axial Response

100

dB SPL

80

B

K

60

50 100 1000 10000 2000

Frequency (Hz

INPUT IMPEDANCE

KF750F Input Impedance (Magnitude)

20

15

10

Ohms

5

B

K

0

20 100 1000 10000 2000

Acoustic Performance Partnership Eastern Acoustic Works KF750F

One Main Street, Whitinsville MA, 0158 8 USA • Phone [phone] • Toll Fr ee 800/992-5013 • Fax [phone] • Web http://www.eaw.com • email [e-mail]

HF Tri-Amp Input Impedance (Magnitude)
MF Tri-Amp Input Impedance (Magnitude)

LF Tri-Amp Input Impedance (Magnitude)

Frequency (Hz)

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BEAMWIDTH

0

y

360

PERFORMANCE SPECIFICATIONS KF750F

KF750F Beamwidth vs Frequency

330
300

Horizontal Beamwidth (1/3 Octave)
Vertical Beamwidth (1/3 Octave)

270
240
210
180

Degrees

150
120

90
60

B

30

K

0

200 1000 1000

Frequency (Hz)

Q & DIRECTIVITY INDEX (DI)

100

10

Q

B

K

1

200 1000 10000

Acoustic Performance Partnership Eastern Acoustic Works KF750F

One Main Street, Whitinsville MA, 0158 8 USA • Phone [phone] • Toll Fr ee 800/992-5013 • Fax [phone] • Web http://www.eaw.com • email [e-mail]

KF750F Q and Directivity

Horizontal Q and Directivity (1/3 Octave)
Vertical Q and Directivity (1/3 Octave)
Total Q and Directivity (1/3 Octave)

Frequency (Hz)

100

Index

10

Directivit

1

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POWER RESPONSE

0

)

120

100

dB SPL

80

PERFORMANCE SPECIFICATIONS KF750F

KF750F Beamwidth Delimited Power Response

B

K

60

200 1000 10000 2000

Frequency (Hz

Acoustic Performance Partnership Eastern Acoustic Works KF750F

One Main Street, Whitinsville MA, 0158 8 USA • Phone [phone] • Toll Fr ee 800/992-5013 • Fax [phone] • Web http://www.eaw.com • email [e-mail]

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PERFORMANCE SPECIFICATIONS KF750F

Q & DIRECTIVITY & BEAMWIDTH BY FREQUENCY

Frequency Hor Beamwidth Ver Beam width Hor Q & Dir Ver Q & Dir Tot Q & Dir

100 239 172 2.3 2.8 2.4
125 226 179 2.4 2.7 2.5
160 213 179 2.6 2.9 2.7
200 177 158 3.1 3.3 3.2
250 124 120 4.6 4.6 4.6
315 100 93 7.4 8.4 7.9
400 79 72 10.2 12.5 11.2
500 68 61 14.3 16.1 15.1
630 53 43 20.1 16.4 18.1
800 45 43 23.5 14.8 18.1
1000 39 40 28.4 20.4 23.7
1250 44 60 24.7 18.5 21.1
1600 45 46 25.5 23.2 24.3
2000 42 41 25.9 24.4 25.1
2500 32 29 36.2 35.6 35.9
3150 28 30 40.7 36.6 38.5
4000 33 35 38.3 39.2 38.7
5000 34 34 41.6 42.2 41.9
6300 31 32 47.7 38.4 42.6
8000 28 31 55.7 39.9 46.6
10000 38 41 26.5 38.1 31.1
12500 37 33 41.4 43.8 42.6
16000 30 35 52.6 39 44.8
20000 35 35 46.9 45.1 46.00

Acoustic Performance Partnership Eastern Acoustic Works KF750F

One Main Street, Whitinsville MA, 0158 8 USA • Phone [phone] • Toll Fr ee 800/992-5013 • Fax [phone] • Web http://www.eaw.com • email [e-mail]