EAW KF850EF Technical Specifications

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TECHNICAL SPECIFICATIONS KF850EF

DESCRIPTION

A 3-way triamplified full range system in a trapezoidal en­closure. In clud es a 15-in woofer in a wave guid e cavity with
ARC™ device , a horn-load ed 10-in mid ran ge con e and a 2-in
exit compression d river mounted coaxially in th e wave guide
cavity on a 55 x 40 constant directivity horn..

APPLICATIONS

The KF850 Virtual Array loudspeaker is the world touring
standard, accepted in more technical riders than any other
loudspeaker. True 3-way design dramatically improves the
quality of vocal repr oduction while the con e-driven midr ange
horn and horn-loaded woofer extend pattern control to the
lowest octaves. Effective for larg e form at perm anen t or por­table applications. Six year warranty.

Applications include:

Concert Tours Corporate Events
Large Theaters Stadiums
Cathedrals Live Music Clubs

DESCRIPTIVE DATA

Part Number 999100

Product Group S

LF Subsystem & Loading 1x 15-in Horn Loaded Cone in

Wave Guide Cavity with ARC™
MF Subsystem & Loading 1x 10-in Horn Loaded Cone
HF Subsystem & Loading 1x 2-in Exit Compression Driver on

Constant Directivity Horn

System Configuration 3-way, Full Range

Powering Configuration(s) Triamplified

Recommended High-Pass

Frequency (24 dB/Octave) 60Hz

Cabinet Type (shape) Trapezoidal

Enclosure Materials Baltic Birch Plywood

Finish Black Catalyzed Polyurethane

Connectors 1 each male and female AP6

Suspension Hardware (4) 19-postition Flytracks (2 each

top and bottom)

Grill Vinyl Coated Perforated Steel,

Foam Backed

Options 179001 Flyclip with ring

179002 Flyclip with hook

Mounting Bracket 255010

Caster Pallet 850

NOMINAL DATA

Frequency Response (Hz)

±3 db 86Hz to 17kHz

-10 dB 65Hz

Axial Sensitivity (dB SPL/1 Watt/1m)

LF 102
MF 109
HF 112

Impedance (Ohms)

LF 8
MF 8
HF 10

Power Handling, AES Standard (Watts)

LF 1000
MF 400
HF 200

Calculated Maximum Output (dB SPL, @ 1m)

LF Peak 138.0
MF Peak 141.0
HF Peak 141.0

LF Long Term 132.0
MF Long Term 135.0
HF Long Term 135.0

Nominal Coverage Angle / -6 dB points (degrees)

Horizontal 55

Vertical 40

Recommended Complementary Systems

Sub SB850/SB1000e

Dimensions inches millimeters

Height 42 1067

Width 26.375 670

Width (Front) 26.375 670

Width (Rear) 16.5 419

Depth 29.5 749

Trapezoid Angle 9.5 degrees per side

Weights pounds kilograms

Net Weight 250 113.8

Shipping Weight 258 117.4

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# KF850EF KF850EF-888050 (A)/2 pp/1/29/99 • Printed In USA

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TECHNICAL SPECIFICATIONS KF850EF

DIMENSIONAL DRAWING SERVICE ITEMS

DIMENSIONAL DRAWINGS

KF850EF

42.00

FRONT

MOUNTING
POINT

29.50

510001
exp 11/1/96 shb

MOUNTING POINTS ARE RECESSED MULTI-POINT AIRCRAFT SEAT
FLY TRACK ATTACHED VERTICALLY AND HORIZONTALLY TO THE CABINET'S
ALUMINUM INTERNAL STRUCTURAL BRACES.

ALL DIMENSIONS ARE IN INCHES UNLESS OTHERWISE NOTED.
CENTER OF BALANCE.

26.38

9.5°

13.19

TOP

3.25

1.75

2.25

29.91

BACK

19.00

16.50

BOTTOM

1.75

11.00

10.63

2.00

BACK

16.50

42.00

3.91

7.00

29.50

SIDES

13.00

12.50

17.75

4.25

20.50

LF: Complete Cone Driver:

EAW Part No. 804036

MF: Complete Cone Driver

EAW Part No. 804022

HF: Complete Compression Driver/Tweeter

EAW Part No. 803011

Filter/Crossover Network: Complete Assembly

EAW Part No. 201062

ARCHITECTURAL SPECIFICATIONS

The three-way full ran g e lou dspeak er system s shall incorpo­rate a 15-in LF transd ucer, a 10-in cone MF tr ansd ucer an d a
2-in exit compression driver HF transducer.

The LF driver shall be mounted in a wave guide cavity for
optimum low frequency directivity. The MF driver shall be
loaded into a midrange horn constructed of 3mm birch ply­wood reinforced with high density polyurethane foam. The
MF horn shall incorporate a phase/displacement plug. The
HF driver shall be mounted in th e wave guid e cavity directly
in front of the LF driver and shall be loaded on a constant
directivity horn with a nomin al coverage pattern of 55° (h)
x 40° (v). An acoustical filter shall be installed in the LF
waveguide cavity behind th e HF section to absorb refracted
HF energy. An internal filter network shall provide system
equalization.

System frequency response shall vary no more than ±3 dB
from 86 Hz to 17 kHz measured on axis. The low frequency
section shall produ ce a Sound Pressure Level (SPL) o f 102 dB
SPL on axis at 1 meter with a power input of 1 Watt, and
shall be capable of producing a peak output of 138 SPL on
axis at 1 meter . It shall handle 1000 W atts of amplifier power
(AES Standard) and shall have a nominal impedance of 8
Ohms. The mi drang e frequency section shall pr oduce a Sound
Pressure Level (SPL) of 109 dB SPL on axis at 1 m eter with a
power input of 1 Watt, and shall be capable of producing a
peak output of 141 SPL on axis at 1 meter. It shall handle
400 Watts of amplifi er power (AES Stan dard) and shall have
a nominal impedan ce of 8 Ohms . The hi gh frequen cy section
shall produce a Soun d Pressure Level (SPL) o f 112 dB SPL on
axis at 1 meter with a power input of 1 Watt, and shall be
capable of producing a peak output of 141 SPL on axis at 1
meter. It shall handle 200 Watts of amplifier power (AES
Standard) and shall have a nominal impedance of 10 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 connectors shall be one each male and fe­male AP6. A total of four 19-posititi on flytracks (2 each top
and bottom) shall be provid ed. Th e fr ont o f th e loudspeak er
shall be covered with a vinyl coated perforated steel grill
backed with open cell foam to protect against dust.

The three-way full ran ge loudspeaker shall be th e EAW m odel
KF850EF .

Acoustic Performance Partnership Eastern Acoustic Works KF850EF

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