EAW KF852E User manual

Acoustic Performance Partnership Eastern Acoustic Works KF852 Page 1
One Main Street, Whitinsville MA, 01524 USA • Phone [phone] • Toll Free 800/992-5013 • Fax [phone] • BBS 800/889-2540
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Technical Specifications KF852E
APPLICATIONS
The KF852E Virtual Array®System is a two way horn-loaded loudspeaker
designed to cover the frequency range from 200Hz to 17kHz. The
large vertical dimension of the midrange horn allows for excellent pat-
tern control down to the lowest frequencies of operation. Dual 10"
midrange drivers offer peak output levels of up to 143dB at 1 meter.
EAW's proprietary ferrofluid cooled CD5002 high frequency compres-
sion driver provides high output with extremely low distortion.
The KF852E has been specifically engineered to complement the BH852
horn-loaded mid-bass system (shown at right beneath the KF852E) and
SB850 direct radiating subwoofer. All are designed to function as a part
of the KF850 Stadium Array System. Arrays incorporating these loud-
speaker systems are easily scalable from clubs and proscenium theaters
to arenas, stadia and the largest outdoor events.
The KF852E is available in two basic versions: the KF852EF intended for
portable use and the KF852EP which is optimized for use in permanent
installations.
ARCHITECTURAL SPECS
OTHER RELEVANT DOCUMENTS
• Group C Hardware Technical Specifications
• Group C Price Lists
• APP Testing Procedures*
• Water Proofing Technical Specifications
• Structural/Mechanical Technical Specifications*
The 2-way mid/high loudspeaker system shall incorporate two 10-inch
cone mid-frequency transducers and a 2 inch throat compression driver
mounted to a constant directivity HF horn. The system shall have Fre-
quency Response of 200 Hz to 17 kHz ±1.5 dB; Axial Sensitivity (1W @
1m) of 114 dB SPL (MF), 112 dB SPL (HF); 100 hour sine wave Power
Handling of 300 Watts (MF), 70 Watts (HF); Nominal horizontal cover-
age of 55°between -6 dB points; Nominal vertical coverage of 40°
between -6 dB points.
The system’s midrange drivers shall be loaded into a constant horizontal
coverage horn constructed of 3 mm cross-grain-laminated birch hard-
wood, reinforced with high density polyurethane foam and incorpo-
rating dual center displacement plugs. The high frequency driver shall
utilize a titanium diaphragm not less than 75 mm in diameter and in-
clude ferrofluid in the voicecoil gap to aid in cooling and damping.
Internal filters shall allow tri-amp operation and shall include driver pro-
tection networks.
The loudspeaker enclosure shall be trapezoidal in shape and constructed
of 18mm thickness void-free cross-grain-laminated birch plywood with
internal bracing. It shall be finished in black catalyzed polyurethane. All
external hardware shall be stainless steel or shall be coated to protect
against rust and corrosion. The front of the system shall be covered
with a perforated steel grill, coated with vinyl to dampen resonance
and backed with open cell foam to protect against dust. Hanging fix-
ture attachment points shall be installed in the top and bottom of the
enclosure.
The loudspeaker system shall be the KF853EF (KF852EP).
SPECIFICATIONS
Frequency Response
±1.5 db 200 to 17k Hz
-10 dB: 130 Hz
Efficiency / Axial Sensitivity
MF 1 W @ 1m: 114 dB SPL
HF 1 w @ 1m: 112 dB SPL
Impedance
MF/HF: 8 Ω(Nominal)
Power Handling
MF 100 hr. Sine Wave: 300 Watts
HF 100 hr. Sine Wave: 70 Watts
MF AES Standard: 800 Watts
HF AES Standard: 200 Watts
Maximum Output
MF Peak SPL: 143 dB SPL
HF Peak SPL: 135 dB SPL
MF Long Term: 138 dB SPL
HF Long Term: 130 dB SPL
Nominal Coverage Angles (-6 dB)
Horizontal: 55 degrees
Vertical: 40 degrees
Additional Descriptive Data
MF Subsystem: 2 x 10-in Cone; Horn Loaded
HF Subsystem: 1x 2-in Throat Compression Driver
On Constant Directivity Horn
Powering Mode: Tri-Amp (LF component: BH852)
Standard Crossover: MX800i-852E
Finish: Black Catalyzed Polyurethane
"F" Connectors: 1 ea. Male & Female Cannon AP6,
Banana Test Points
"P" Connectors: 6 pin barrier strip, Banana Test Points
Rigging: 2 x AirCargo 20864 Track, Top &
Bottom; Internal Subframe
Grill: Vinyl Coated Perforated Steel; Open
Cell Foam Backing
Dimensions & Weights
Height: 42.0 in (1066.8 mm)
Width: 26.38 in (670 mm)
Depth: 29.5 in (749.3 mm)
Back Width: 16.5 in (419.1 mm)
Net Weight: 231 lbs (103.0 Kg)
Shipping Weight: 246 lbs (110.7 Kg)
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Acoustic Performance Partnership Eastern Acoustic Works KF852 Page 2
One Main Street, Whitinsville MA, 01524 USA • Phone [phone] • Toll Free 800/992-5013 • Fax [phone] • BBS 800/889-2540
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Drawings KF852E
DIMENSIONAL DRAWINGS INPUT PLATES
KF852EP ALL DIMENSIONS ARE IN INCHES UNLESS OTHERWISE NOTED
13.00
BOTTOM
SIDES
2.00
29.50
35.50
BACK
16.50
21.88
5.38
2.35
8.25
20.90
5.00
2.38 2.63
38.00
2.00
1.88
13.58
5.00
2.63
26.38
FRONT
TOP
9.5°
42.00
MOUNTING POINTS 3/8"-16 NUTS WELDED TO A 2"x 2" STEEL PLATE
KF852EF 
35.50
13.00
3.91
29.91
NOTE:
MOUNTING POINTS 
ARE RECESSED 
MULTI- POINT AIR-
CRAFT SEAT FLY 
TRACK ATTACHED 
VERTICALLY AND 
HORIZONTALLY TO 
THE CABINET'S 
ALUMINUM INTERNAL 
STRUCTURAL BRACES.
19.00
BOTTOM
7.00
BACK
SIDES
2.25
29.50 16.50
29.50
FRONT
26.38
TOP
9.5°
42.00



-- +
MID 1 MID 2 HIGH
-- --++
KF-852EP
NO.
MADE IN USA
EASTERN ACOUSTIC WORKS
Virtual Array
TM
TECHNOLOGY
PIN 5 PIN 6
HIGH HIGH
... ...
--
+
PIN 3 PIN 4
MID MID
... ...
--
+
PIN 1 PIN 2
LOW LOW
... ...
--
+
KF-852EF
NO.
MADE IN USA
EASTERN ACOUSTIC WORKS
Virtual Array
TM
TECHNOLOGY
CANNON
1 2
3
4 5
6
CANNON
1 2
3
4 56

Acoustic Performance Partnership Eastern Acoustic Works KF852 Page 3
One Main Street, Whitinsville MA, 01524 USA • Phone [phone] • Toll Free 800/992-5013 • Fax [phone] • BBS 800/889-2540
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Performance Data KF852E
DISTORTIONFREQUENCY RESPONSE
Q & DIRECTIVITY INDEX (DI)
BEAMWIDTH
60
80
100
120
100 1000 10000 20000
dB SPL
Frequency (Hz)
KF852E with MX800i-852E Axial Response
K
B
1
10
100
0
2
4
6
8
10
12
14
16
18
20
200 1000 10000
Q
Directivity Index
Frequency (Hz)
Horizontal Q and Directivity (1/3 Octave)
Vertical Q and Directivity (1/3 Octave)
Total Q and Directivity (1/3 Octave)
KF852E with MX800i-852E Q and Directivity
K
B
0
30
60
90
120
150
180
210
240
270
300
330
360
200 1000 10000
Degrees
Frequency (Hz)
Horizontal Beamwidth (1/3 Octave)
Vertical Beamwidth (1/3 Octave)
KF852E with MX800i-852E Beamwidth vs Frequency
K
B
0
20
40
60
80
100
120
140
200 1000 10000
dB SPL
Frequency (Hz)
Fundamental at 1% Power (raised 10 dB)
2nd Harmonic at 1% Power (raised 10 dB)
3rd Harmonic at 1% Power (raised 10 dB)
Fundamental at 10% Power
2nd Harmonic at 10% Power
3rd Harmonic at 10% Power
KF852E with MX800i-852E Harmonic Content
K
B
Freq Hor Q Ver Q Tot Q Hor Beamwidth Ver Beamwidth
100 1.8 2 1.8 360 360
125 1.9 2.6 2.2 360 360
160 3.3 4.3 3.6 160 127
200 2.7 4.1 3.3 189 124
250 4.2 7.2 5.2 130 90
315 4.6 7.6 5.7 119 82
400 6.4 9 7.3 98 48
500 8.4 10 9.1 83 38
630 12.1 14.4 13.1 67 58
800 13.3 22.1 16.6 57 26
1000 12 23.5 15.9 69 25
1250 11 19.1 14 79 27
1600 7.9 12.4 9.9 81 69
2000 9.1 14.2 12.6 67 56
2500 10 21.3 16.8 58 45
3150 14.3 28.9 19.2 61 38
4000 23.3 33.3 27.4 51 36
5000 25.3 41.6 31.5 49 32
6300 23.1 50.4 31.7 53 28
8000 22.1 45.4 29.7 51 30
10000 16 44.1 26.4 56 34
12500 15 30.3 20.3 60 38
16000 14.8 37.2 20.3 63 34
20000 36.6 35.7 36.2 43 36
Q & BEAMWIDTH BY FREQUENCY

Acoustic Performance Partnership Eastern Acoustic Works KF852 Page 4
One Main Street, Whitinsville MA, 01524 USA • Phone [phone] • Toll Free 800/992-5013 • Fax [phone] • BBS 800/889-2540
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HORIZONTAL OFF-AXIS RESPONSE VERTICAL OFF-AXIS RESPONSE
Performance Data KF852E
INPUT IMPEDANCE
On-axis response normalized to 0 dB. On-axis response normalized to 0 dB.
0
5
10
15
20
20 100 1000 10000 20000
Ohms
Frequency (Hz)
MF/HF Bi-Amp Input Impedance (Magnitude)
LF Bi-Amp Input Impedance (Magnitude)
KF852E with MX800i-852E
Bi-Amp Input Impedance (Magnitude)
K
B
-20
-10
0
10
200 1000 10000
Attenuation in dB
Frequency (Hz)
Horizontal +10 degrees
Horizontal -10 degrees
KF852E with MX800i-852E Horizontal ±10°
K
B
-20
-10
0
10
200 1000 10000
Attenuation in dB
Frequency (Hz)
Vertical +10 degrees
Vertical -10 degrees
KF852E with MX800i-852E Vertical ±10°
K
B
-20
-10
0
10
200 1000 10000
Attenuation in dB
Frequency (Hz)
Horizontal +20 degrees
Horizontal -20 degrees
KF852E with MX800i-852Ei Horizontal ±20°
K
B
-20
-10
0
10
200 1000 10000
Attenuation in dB
Frequency (Hz)
Vertical +20 degrees
Vertical -20 degrees
KF852E with MX800i-852E Vertical ±20°
K
B
-20
-10
0
10
200 1000 10000
Attenuation in dB
Frequency (Hz)
Horizontal +40 degrees
Horizontal -40 degrees
KF852E with MX800i-852E Horizontal ±40°
K
B
-20
-10
0
10
200 1000 10000
Attenuation in dB
Frequency (Hz)
Vertical +40 degrees
Vertical -40 degrees
KF852E with MX800i-852E Vertical ±40°
K
B
-20
-10
0
10
200 1000 10000
Attenuation in dB
Frequency (Hz)
Horizontal +30 degrees
Horizontal -30 degrees
KF852E with MX800i-852Ei Horizontal ±30°
K
B
-20
-10
0
10
200 1000 10000
Attenuation in dB
Frequency (Hz)
Vertical +30 degrees
Vertical -30 degrees
KF852E with MX800i-852E Vertical ±30°
K
B

Acoustic Performance Partnership Eastern Acoustic Works KF852 Page 5
One Main Street, Whitinsville MA, 01524 USA • Phone [phone] • Toll Free 800/992-5013 • Fax [phone] • BBS 800/889-2540
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Horizontal 1/3 Octave Polar Data KF852E
0°
30°
60°
90°
120°
150°
180°
210°
240°
270°
300°
330°
100
125
160
200
K
B
0°
30°
60°
90°
120°
150°
180°
210°
240°
270°
300°
330°
1600
2000
2500
3150
K
B
0°
30°
60°
90°
120°
150°
180°
210°
240°
270°
300°
330°
630
800
1000
1250
K
B
0°
30°
60°
90°
120°
150°
180°
210°
240°
270°
300°
330°
10000
12500
16000
20000
K
B
0°
30°
60°
90°
120°
150°
180°
210°
240°
270°
300°
330°
4000
5000
6300
8000
K
B
0°
30°
60°
90°
120°
150°
180°
210°
240°
270°
300°
330°
250
315
400
500
K
B

Acoustic Performance Partnership Eastern Acoustic Works KF852 Page 6
One Main Street, Whitinsville MA, 01524 USA • Phone [phone] • Toll Free 800/992-5013 • Fax [phone] • BBS 800/889-2540
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Vertical 1/3 Octave Polar Data KF852E
0°
30°
60°
90°
120°
150°
180°
210°
240°
270°
300°
330°
100
125
160
200
K
B
0°
30°
60°
90°
120°
150°
180°
210°
240°
270°
300°
330°
1600
2000
2500
3150
K
B
0°
30°
60°
90°
120°
150°
180°
210°
240°
270°
300°
330°
10000
12500
16000
20000
K
B
0°
30°
60°
90°
120°
150°
180°
210°
240°
270°
300°
330°
630
800
1000
1250
K
B
0°
30°
60°
90°
120°
150°
180°
210°
240°
270°
300°
330°
250
315
400
500
K
B
0°
30°
60°
90°
120°
150°
180°
210°
240°
270°
300°
330°
4000
5000
6300
8000
K
B

Acoustic Performance Partnership Eastern Acoustic Works KF852 Page 7
One Main Street, Whitinsville MA, 01524 USA • Phone [phone] • Toll Free 800/992-5013 • Fax [phone] • BBS 800/889-2540
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0°
30°
60°
90°
120°
150°
180°
210°
240°
270°
300°
330°
K
B
KF852E 125 Hz Horizontal Octave Polar Data
0°
30°
60°
90°
120°
150°
180°
210°
240°
270°
300°
330°
K
B
KF852E 250 Hz Horizontal Octave Polar Data
Horizontal Octave Polar Data KF852E

Acoustic Performance Partnership Eastern Acoustic Works KF852 Page 8
One Main Street, Whitinsville MA, 01524 USA • Phone [phone] • Toll Free 800/992-5013 • Fax [phone] • BBS 800/889-2540
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0°
30°
60°
90°
120°
150°
180°
210°
240°
270°
300°
330°
K
B
KF852E 500 Hz Horizontal Octave Polar Data
0°
30°
60°
90°
120°
150°
180°
210°
240°
270°
300°
330°
K
B
KF852E 1000 Hz Horizontal Octave Polar Data
Horizontal Octave Polar Data KF852E

Acoustic Performance Partnership Eastern Acoustic Works KF852 Page 9
One Main Street, Whitinsville MA, 01524 USA • Phone [phone] • Toll Free 800/992-5013 • Fax [phone] • BBS 800/889-2540
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0°
30°
60°
90°
120°
150°
180°
210°
240°
270°
300°
330°
K
B
KF852E 2000Hz Horizontal Octave Polar Data
0°
30°
60°
90°
120°
150°
180°
210°
240°
270°
300°
330°
K
B
KF852E 4000 Hz Horizontal Octave Polar Data
Horizontal Octave Polar Data KF852E

Acoustic Performance Partnership Eastern Acoustic Works KF852 Page 10
One Main Street, Whitinsville MA, 01524 USA • Phone [phone] • Toll Free 800/992-5013 • Fax [phone] • BBS 800/889-2540
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0°
30°
60°
90°
120°
150°
180°
210°
240°
270°
300°
330°
K
B
KF852E 8000 Hz Horizontal Octave Polar Data
0°
30°
60°
90°
120°
150°
180°
210°
240°
270°
300°
330°
K
B
KF852E 16000 Hz Horizontal Octave Polar Data
Horizontal Octave Polar Data KF852E

Acoustic Performance Partnership Eastern Acoustic Works KF852 Page 11
One Main Street, Whitinsville MA, 01524 USA • Phone [phone] • Toll Free 800/992-5013 • Fax [phone] • BBS 800/889-2540
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0°
30°
60°
90°
120°
150°
180°
210°
240°
270°
300°
330°
K
B
KF852E 125 Hz Vertical Octave Polar Data
0°
30°
60°
90°
120°
150°
180°
210°
240°
270°
300°
330°
K
B
KF852E 250 Hz Vertical Octave Polar Data
Vertical Octave Polar Data KF852E

Acoustic Performance Partnership Eastern Acoustic Works KF852 Page 12
One Main Street, Whitinsville MA, 01524 USA • Phone [phone] • Toll Free 800/992-5013 • Fax [phone] • BBS 800/889-2540
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0°
30°
60°
90°
120°
150°
180°
210°
240°
270°
300°
330°
K
B
KF852E 500 Hz Vertical Octave Polar Data
0°
30°
60°
90°
120°
150°
180°
210°
240°
270°
300°
330°
K
B
KF852E 1000 Hz Vertical Octave Polar Data
Vertical Octave Polar Data KF852E

Acoustic Performance Partnership Eastern Acoustic Works KF852 Page 13
One Main Street, Whitinsville MA, 01524 USA • Phone [phone] • Toll Free 800/992-5013 • Fax [phone] • BBS 800/889-2540
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0°
30°
60°
90°
120°
150°
180°
210°
240°
270°
300°
330°
K
B
KF852E 2000 Hz Vertical Octave Polar Data
0°
30°
60°
90°
120°
150°
180°
210°
240°
270°
300°
330°
K
B
KF852E 4000 Hz Vertical Octave Polar Data
Vertical Octave Polar Data KF852E

Acoustic Performance Partnership Eastern Acoustic Works KF852 Page 14
One Main Street, Whitinsville MA, 01524 USA • Phone [phone] • Toll Free 800/992-5013 • Fax [phone] • BBS 800/889-2540
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0°
30°
60°
90°
120°
150°
180°
210°
240°
270°
300°
330°
K
B
KF852 8000 Hz Vertical Octave Polar Data
0°
30°
60°
90°
120°
150°
180°
210°
240°
270°
300°
330°
K
B
KF852E 16000 Hz Vertical Octave Polar Data
Vertical Octave Polar Data KF852E

Acoustic Performance Partnership Eastern Acoustic Works KF852 Page 15
One Main Street, Whitinsville MA, 01524 USA • Phone [phone] • Toll Free 800/992-5013 • Fax [phone] • BBS 800/889-2540
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Configuration Data KF852E
Part#: 80852EA Main System: KF852E with BH852 Notes: CD 5002 Subwoofer: SB850
Designation Value PCB # Function Implementation
R1 232k 1 & 2 Off Mode Fixed LF Hi-Pass (with R2) -3 dB @ 40 Hz
R2 232k 1 & 2 SB Fixed Boost +6.0 dB @ 35 Hz
R3 3.32k 1 & 2 Parametric EQ -11 dB @ 3500 Hz, B=.9
R4 825 Ohms 1 & 2 Parametric EQ -11 dB @ 3500 Hz, B=.9
R5 9.76k 1 & 2 Parametric EQ -11 dB @ 3500 Hz, B=.9
R6 6.65k 1 & 2 Parametric EQ -11 dB @ 3500 Hz, B=.9
R7 14.3k 1 & 2 Off Mode LF Dynamic Boost (with R8) +6.0 dB @ 50 Hz
R8 93.1k 1 & 2 Adj./Dist. Mode Dynamic Hi-Pass -3 dB @ 13 Hz
R9 93.1k 1 & 2 Adj./Dist. Mode Dynamic Hi-Pass -3 dB @ 13 Hz
R10 open 1 & 2 Off Mode LF Dynamic Boost (with R9) +6.0 dB @ 50 Hz
R11 475 Ohms 1 & 2 Parametric EQ -11 dB @ 3500 Hz, B=.9
R12 2.49k 1 & 2 Off Mode Fixed LF Hi-Pass (with R13) -3 dB @ 40 Hz
R13 12.7k 1 & 2 SB Fixed Boost +6.0 dB @ 35 Hz
R1 5.23k 3 & 4 LF Phase 100k/22nF -> 1456 Hz
R2 7.68k 3 & 4 SB Gain +4.7 dB
R3 2.21k 3 & 4 SB Gain +4.7 dB
R4 115k 3 & 4 SB Threshold 1.0 V
R5 7.15k 3 & 4 LF Gain +3.5 dB
R6 2.87k 3 & 4 LF Gain +3.5 dB
R7 21.0k 3 & 4 SB Phase 40k/100nF -> 116 Hz
R8 36.5k 3 & 4 Off/Dist. Mode Fixed LF Hi-Pass -3 dB @ 40 Hz
R9 5.9k 3 & 4 MF Gain -1.5 dB
R10 124k 3 & 4 LF Threshold 1.0V
R11 43.2k 3 & 4 Off/Dist. Mode Fixed LF Hi-Pass -3 dB @ 40 Hz
R12 3.92k 3 & 4 MF Gain -1.5 dB
R13 133k 3 & 4 MF Threshold 1.0V
R14 9.31k 3 & 4 HF Gain +7.9 dB
R15 249k 3 & 4 MF Phase 100k/2.2 nF -> 1.01 kHz
R16 750 Ohms 3 & 4 HF Gain +7.9 dB
R17 174k 3 & 4 HF Threshold 0.5 V
RN1, RN7 13k HF Hi-Pass 1225 Hz (10 nF)
RN2, RN8 6.2k MF Hi-Pass 256 Hz (100 nF)
RN3, RN9 10k MF Low-Pass 1.6 kHz (10 nF)
RN4, RN10 6.2k LF Low-Pass 256 Hz (100 nF)
RN5, RN11 20k LF Hi-Pass 80 Hz (100 nF)
RN6, RN12 20k SB Low-Pass 80 Hz (100 nF)
High Frequency EQ jumper: Pin 5

Acoustic Performance Partnership Eastern Acoustic Works KF852 Page 16
One Main Street, Whitinsville MA, 01524 USA • Phone [phone] • Toll Free 800/992-5013 • Fax [phone] • BBS 800/889-2540
A
C
O
U
S
T
I
C
A
L
P
E
R
F
O
R
M
A
N
C
E
P
A
R
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E
R
S
H
I
P
-40
-20
0
20
20 100 1000 10000 20000
dB SPL
Frequency (Hz)
HF EQ IN
HF EQ OUT
MF
LF SB ADJ
LF SB OFF
LF SB DIST
SB
MX800i-852E CCEP Configuration
K
B
Configuration Data KF852E