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 Technical Specifications KF853

APPLICATIONS

ARCHITECTURAL SPECS

OTHER RELEVANT DOCUMENTS

• Group C Hardware Technical Specifications
• Group C Price Lists
• APP Testing Procedures*
•Weather 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 118 dB SPL (MF), 117 dB SPL (HF); 100 hour sine wave Power
Handling of 300 Watts (MF), 70 Watts (HF); Nominal horizontal cover-
age of 30

°

 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 and equalization networks.

The loudspeaker enclosure shall be trapezoidal in shape and constructed
of 18mm thickness, void-free, cross-grain-laminated birch plywood and
shall include extensive internal bracing. It shall be finished in black cata-
lyzed polyurethane. All external hardware shall be stainless steel or alu-
minum 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. Heavy duty Aircraft Seat Track suspension points
shall be installed in the top and bottom of the enclosure.  Aluminum
bar-stock shall connect the top and bottom suspension points.

The loudspeaker system shall be the KF853.

PRELIMINARY PRODUCT INFORMATION

The KF853 Virtual Array

®

 System is a long-throw two way horn-loaded

loudspeaker designed to cover the frequency range from 200Hz to
17kHz.  The frequency response of this system is optimized to compen-
sate for atmospheric attenuation of high frequencies over long distances.
The large vertical dimension of the midrange horn allows for excellent
pattern control down to the lowest frequencies of operation.  Dual 10"
midrange drivers offer peak output levels of up to 147 dB at 1 meter.
EAW's new proprietary ferrofluid cooled CD5003 high frequency com-
pression driver provides high output with extremely low distortion.

The KF853 has been specifically engineered to operate in conjunction
with the BH853 long-throw horn-loaded mid-bass system as the long-
throw element of the KF850 "family".  Other "family" members include:
the KF850 three-way system, KF852 mid-high system, BH852 horn-
loaded mid-bass system and the SB850 & SB1000 direct radiating sub-
woofers. Together, they form the elements of the KF850 Stadium Array
System. Arrays incorporating these loudspeaker systems are easily scal-
able from clubs and proscenium theaters to arenas, stadia and the larg-
est outdoor events.

EASTERN ACOUSTIC WORKS

One Main Street, Whitinsville, MA 01588 • (508) 234 - 6158 • FAX (508) 234 - 8251 • BBS (800) 889-2540

EAW products are continually improved. All specifications are therefore subject to change without notice. • PUB# KF853/C5/3/5/95

Frequency Response

±

1.5 db

200 to 17k Hz

-10 dB:

130 Hz

Efficiency / Axial Sensitivity

MF 1 W @ 1m:

118 dB SPL

HF 1 w @ 1m:

117 dB SPL

Impedance

MF/HF:

 (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:

147 dB SPL

HF Peak SPL:

140 dB SPL

MF Long Term:

142 dB SPL

HF Long Term:

135 dB SPL

Nominal Coverage Angles (-6 dB)

Horizontal:

40 degrees

Vertical:

30 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:

MX8000-853

Finish:

Black Catalyzed Polyurethane

Connectors:

1 ea. Male & Female Cannon AP6,
Banana Test Points

Rigging:

2 x Anchra Track, Top & Bottom;
Internal Subframe

Grill:

Vinyl Coated Perforated Steel; Open
Cell Foam Backing

Dimensions & Weights

Height:

42.0 in

(1066 mm)

Width:

27.38 in (695 mm)

Depth:

25.5 in

(647 mm)

Back Width:

15.5 in

(394 mm)

Net Weight:

231 lbs

(103.0 Kg)

Shipping Weight:

246 lbs

(110.7 Kg)

SPECIFICATIONS

Summary of Contents for KF853

Page 1: ...over the frequency range from 200Hz to 17kHz The frequency response of this system is optimized to compen sate for atmospheric attenuation of high frequencies over long distances The large vertical di...

Page 2: ...PERFORMANCEPA R T N E R S H I P PRELIMINARY PRODUCT INFORMATION Drawings KF853 DIMENSIONAL DRAWINGS PIN 5 PIN 6 HIGH HIGH PIN 3 PIN 4 MID MID PIN 1 PIN 2 LOW LOW KF 853EF NO MADE IN USA EASTERN ACOUST...

Page 3: ...10000 47 7 42 1 56 7 32 18 12500 54 3 47 6 54 31 30 16000 41 9 85 3 56 2 36 23 20000 24 7 31 3 33 7 40 18 Q BEAMWIDTH BY FREQUENCY 80 100 120 140 100 1000 10000 20000 dB SPL Frequency Hz KF853 Axial R...

Page 4: ...Hz Horizontal 40 degrees Horizontal 40 degrees KF853 with Processor Horizontal 40 K B 30 20 10 0 10 200 1000 10000 Attenuation in dB Frequency Hz Vertical 40 degrees Vertical 40 degrees KF853 with Pr...

Page 5: ...KF853 with processor Horizontal Beamwidth vs Frequency K B 1 10 100 0 2 4 6 8 10 12 14 16 18 20 1000 10000 20000 Q Directivity Index Frequency Hz Q Horizontal Directivity Horizontal KF853 with process...

Page 6: ...RODUCT INFORMATION Horizontal 1 3 Octave Polar Data KF853 0 30 60 90 120 150 180 210 240 270 300 330 10000 12500 16000 20000 K B 0 30 60 90 120 150 180 210 240 270 300 330 200 K B 0 30 60 90 120 150 1...

Page 7: ...PRODUCT INFORMATION Vertical 1 3 Octave Polar Data KF853 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 10000 12500 16000 20000 K B 0 30...

Page 8: ...92 5013 Fax 508 234 8251 BBS 800 889 2540 A C O U S T I C ALPERFORMANCEPA R T N E R S H I P PRELIMINARY PRODUCT INFORMATION Horizontal Octave Polar Data KF853 0 30 60 90 120 150 180 210 240 270 300 33...

Page 9: ...2 5013 Fax 508 234 8251 BBS 800 889 2540 A C O U S T I C ALPERFORMANCEPA R T N E R S H I P PRELIMINARY PRODUCT INFORMATION Horizontal Octave Polar Data KF853 0 30 60 90 120 150 180 210 240 270 300 330...

Page 10: ...2 5013 Fax 508 234 8251 BBS 800 889 2540 A C O U S T I C ALPERFORMANCEPA R T N E R S H I P PRELIMINARY PRODUCT INFORMATION Horizontal Octave Polar Data KF853 0 30 60 90 120 150 180 210 240 270 300 330...

Page 11: ...01588 USA Phone 508 234 6158 Toll Free 800 992 5013 Fax 508 234 8251 BBS 800 889 2540 A C O U S T I C ALPERFORMANCEPA R T N E R S H I P PRELIMINARY PRODUCT INFORMATION Horizontal Octave Polar Data KF8...

Page 12: ...0 992 5013 Fax 508 234 8251 BBS 800 889 2540 A C O U S T I C ALPERFORMANCEPA R T N E R S H I P PRELIMINARY PRODUCT INFORMATION Vertical Octave Polar Data KF853 0 30 60 90 120 150 180 210 240 270 300 3...

Page 13: ...992 5013 Fax 508 234 8251 BBS 800 889 2540 A C O U S T I C ALPERFORMANCEPA R T N E R S H I P PRELIMINARY PRODUCT INFORMATION Vertical Octave Polar Data KF853 0 30 60 90 120 150 180 210 240 270 300 33...

Page 14: ...992 5013 Fax 508 234 8251 BBS 800 889 2540 A C O U S T I C ALPERFORMANCEPA R T N E R S H I P PRELIMINARY PRODUCT INFORMATION Vertical Octave Polar Data KF853 0 30 60 90 120 150 180 210 240 270 300 33...

Page 15: ...A 01588 USA Phone 508 234 6158 Toll Free 800 992 5013 Fax 508 234 8251 BBS 800 889 2540 A C O U S T I C ALPERFORMANCEPA R T N E R S H I P PRELIMINARY PRODUCT INFORMATION Vertical Octave Polar Data KF8...

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