EAW KF850zF User Manual

Eastern Acoustic Works One Main Street Whitinsville, MA 01588 tel [phone] fax [phone] www.eaw.com

EAW products are continually improved. All specifications are therefore subject to change without notice. PRELIMINARY January 2004

KF850zF Specifications group · S

preliminary

FEATURES

• Tri-amplified VA™ 3-way full-range system

• Touring industry standard

• Flyable version with fly-track hardware

• Companion SB850zR subwoofer

DESCRIPTION

The KF850 Series has been the touring system standard for well
over ten years, being acceptable in more technical riders than any
other loudspeaker. The KF850z incorporates a number of advances
in loudspeaker technology and performance developed over that
time by EAW Engineers. The result is a KF850 with higher impact
and fidelity than ever before.

Legendary KF850 performance is enhanced with a neodymium,
Orbital Magnet Array™ HF driver offering increased surface area for
better cooling, and higher reliability. A new HF horn extends HF
response and fidelity while minimizing throat distortion. The critical MF
subsystem is based on EAW's Radial Phase Plug™ design used in
the KF650, KF750, and KF760. An optional user-installed, passive
MF/HF crossover kit allows more economical, bi-amplified operation.

The KF850z's advanced performance will not be sonically
compatible with exsiting KF850E inventories. To facilitate
integration, kits are available to upgrade them to the KF850z. The
KF850z's enclosure and rigging hardware are fully compatible with
the KF850E Series. However, the "z" enclosures incorporate a
stacking pad on top that mates with a recess in the bottoms. KF850z
DSP processor settings are available online for EAW's MX8750 as
well a select group of other popular touring processors.

KF850 Series applications continue to include: concert tours,
corporate events, large theaters, stadiums, cathedrals, large live
music clubs. Six year warranty.

3-WAY FULL-RANGE TRI-AMP

See TABULAR DATA notes for details

CONFIGURATION

Subsystem

Transducer Loading

LF 1x 15 in cone Horn-loaded

MF 1x 10 in cone Horn-loaded

Radial Phase Plug™

HF 1x 2 in exit, 3 in voice Horn-loaded

coil neodymium compression driver

Operating Mode

Amplifier Channels External Signal Processing

Tri-amp LF, MF, HF DSP w/3-way filters

PERFORMANCE

1

Operating Range 75 Hz to 20 kHz
Nominal Beamwidth

Horz 55°

Vert 40°

Axial Sensitivity (whole space SPL)

LF 101 dB 75 Hz to 250 kHz

MF 109 dB 250 Hz to 1050 Hz

HF 112 dB 1050 Hz to 20 kHz

Peak Sensitivity (whole space SPL)

LF 106 dB 20 Hz to 20 kHz

MF 111 dB 20 Hz to 20 kHz

HF 116 dB 20 Hz to 20 kHz

Input Impedance (ohms)

Nominal Minimum

LF 8 7.7 @ 120 Hz

MF 8 9.7 @ 1000 Hz

HF 8 9.2 @ 5010 Hz

Recommended High Pass Filter

High Pass =>40 Hz, 24 dB/octave

Accelerated Life Test

2

LF 75 V 700 W @ 8 ohm

MF 56 V 400 W @ 8 ohm

HF 40 V 200 W @ 8 ohm

Calculated Axial Output Limit (whole space SPL)

Average Peak

LF 129 dB 135 dB

MF 135 dB 141 dB

HF 135 dB 141 dB

ORDERING DATA

Description Part Number

KF850zF Black 0006816

Optional Accessories

KF850z/SB850z caster pallet 0007683
KF850z/SB850z caster pallet kit 0008835
KF850z bi-amp crossover kit* 0007951
KF850z upgrade kit [AP6] 0006241
KF850z upgrade kit [NL8] 0006242
Fly clip w/ ring 0001386
Fly clip w/ hook 179001

* The bi-amp crossover kit can only be used on a factory-built KF850z. It cannot be used on a KF850
originally manufactured as an “E” series and later upgraded to a KF850z.

1 To achieve specified performance, the listed external signal processing with EAW-provided settings is required.
2 For recommendations to select power amplifier size refer to : “HOW MUCH AMPLIFIER POWER DO I NEED?” on the EAW web site.

Eastern Acoustic Works One Main Street Whitinsville, MA 01588 tel [phone] fax [phone] www.eaw.com

EAW products are continually improved. All specifications are therefore subject to change without notice. PRELIMINARY January 2004

KF850zF Specifications group · S

preliminary

ENCLOSURE

Material Baltic birch plywood

Finish Wear resistant textured black paint

Grille Powder-coated perforated steel

NOTE: This drawing has been reduced. Do not scale.

(16.50)

4.00

2X 19.25

2X 7.43

GRILLE PARTIALLY SHOWN

42.37

42.00

2X 2.27

TOP

DIMENSIONS APPLY

TO TOP AND BOTTOM

26.37

C

19°

A

L

9.25

16.00

8.50

2X 27.28

29.50

4X 6.44

2X 5.22

4X 10.81

A

2X 3.28

C

L

NOTES:

1. SYMBOL INDICATES 19.00 X 1.35
FLYTRACK.

2. SYMBOL INDICATES CENTER OF BALANCE.

3. WEIGHT APPROX. 247 LBS.

4. SHIPPING WEIGHT APPROX. 270 LBS.

2X 22.10

ACCESS PANEL

8X HANDLE

INPUT

21.50

16.10

C

L

3.50

4.25

BOTTOM

FRONT

C

L

PALLET RECESS
BOTTOM ONLY

8.38

9.50

VIEW A-A

DIMENSIONS APPLY

TO BOTH SIDES

PRODUCTION

6.50

BACK

KF850zF

EASTERN ACO USTIC W ORKS

Eastern Acoustic Works One Main Street Whitinsville, MA 01588 tel [phone] fax [phone] www.eaw.com

EAW products are continually improved. All specifications are therefore subject to change without notice. PRELIMINARY January 2004

KF850zF Specifications group · S

preliminary

PERFORMANCE DATA See NOTES GRAPHIC DATA Notes for details

Frequency Response: Processed Tri-amplified

LF = green MF = Black HF = orange Complete = blue

SPL (dB)

Frequency Response: Unprocessed

LF = green MF = Black HF = orange

SPL (dB)

Frequency Response: Digital Signal Processor

LF = green MF = Black HF = orange

dB re 0.775 V

Beamwidth (-6 dB SPL Points)

Horizontal = orange Vertical = black

Degrees

Impedance Magnitude

LF = green MF = Black HF = orange

Ohms

120

110

100

90

80

70

60

100

10

1

400

100

10

1

100 1000 20000

Frequency (Hz)

10 100 1000 20000

Frequency (Hz)

120

110

100

90

80

70

60

20

10

0

-10

-20

-30

-40

10 100 1000 20000

Frequency (Hz)

10 100 1000 20000

Frequency (Hz)

10 100 1000 20000

Frequency (Hz)

Eastern Acoustic Works One Main Street Whitinsville, MA 01588 tel [phone] fax [phone] www.eaw.com

EAW products are continually improved. All specifications are therefore subject to change without notice. PRELIMINARY January 2004

KF850zF Specifications group · S

preliminary

INPUT PANEL

NOTES

TABULAR DATA

1. Primary Measurement/Data Processing System: FChart: proprietary EAW software.

2. Secondary Measurement System: Brüel & Kjær 2012.

3. Microphone Systems: Earthworks M30; Brüel & Kjær 4133

4. Measurements: Dual channel FFT; length: 32 768 samples; sample rate: 48 kHz; logarithmic sine wave sweep.

5. Measurement System Qualification (includes all uncertainties): SPL: accuracy +/-0.2 dB @ 1 kHz, precision +/-0.5 dB 20 Hz to 20 kHz, resolution 0.05 dB; Frequency: accuracy +/-1 %,

precision +/-0.1 Hz, resolution the larger of 1.5 Hz or 1/48 octave; Time: accuracy +/-10.4 µs, precision +/-0.5 µs, resolution 10.4 µs; Angular: accuracy +/-1°, precision +/-0.5°, resolution 0.5°.

6. Environment: Measurements time-widowed and processed to eliminate room effects, approximating an anechoic environment. Data processed as anechoic or fractional space, as noted.

7. Measurement Distance: 7.6 to 8.0 m. Data is referenced to other distances using the Inverse Square Law.

8. Volts: Measured rms value of the test signal.

9. Watts: Per audio industry practice, “loudspeaker watts” are calculated as voltage squared divided by rated nominal impedance. Thus, these are not True Watt units of energy as defined by

International Standard.

10. SPL: (Sound Pressure Level) Equivalent to the average level of a signal referenced to 0 dB SPL = 20 microPascals.

11. Subsystem: This lists the transducer(s) and their acoustic loading for each passband. Sub = Subwoofer, LF = Low Frequency, MF = Mid Frequency, HF = High Frequency.

12. Operating Mode: User selectable configurations. Between system elements, a comma (,) = separate amplifier channels; a slash (/) = single amplifier channel. DSP = Digital Signal Processor.

IMPORTANT: To achieve the specified performance, the listed external signal processing must be used with EAW-provided settings.

13. Operating Range: Range where the processed Frequency Response stays within -10 dB SPL of the power averaged SPL within this range; measured on the geometric axis. Narrow band
dips are excepted.

14. Nominal Beamwidth: Design angle for the -6 dB SPL points, referenced to 0 dB SPL as the highest level.

15. Axial Sensitivity: Power averaged SPL over the Operating Range with an input voltage that would produce 1 W at the nominal impedance; measured with no external processing on the

geometric axis, referenced to 1 m.

16. Peak Sensitivity: Highest axial SPL measured within the 20 Hz to 20 kHz bandpass with an input voltage that would produce 1 W at the nominal impedance; measured with no external
processing on the geometric axis, referenced to 1 m.

17. Nominal Impedance: Selected 4, 8, or 16 ohm resistance such that the minimum impedance point is no more than 20% below this resistance over the Operating Range.

18. Accelerated Life Test: Maximum test input voltage applied with an EIA-426B defined spectrum; measured with recommended signal processing and Recommended Protection Filter.

19. Calculated Axial Output Limit: Highest average and peak SPLs possible during the Accelerated Life Test. The Peak SPL represents the 2:1 (6 dB) crest factor of the Life Test signal.

20. Recommended High Pass Filter: This should be used to help protect the loudspeaker from excessive input signal levels below the Operating Range.

GRAPHIC DATA

1. Resolution: To remove insignificant fine details, 1/12 octave cepstral smoothing was applied to acoustic frequency response and 1/3 octave cepstral smoothng was applied to the

beamwidth and impedance data. Other graphs are plotted using raw data.

2. Frequency Responses: The variation in acoustic output level with frequency for a constant input signal of 2 volts (4 ohm nominal impedance), 2.83 volts (8 ohm nominal impedance),
or 4 volts (16 ohm nominal impedance) referenced to a distance of 1 m. For processed systems, this applies where the processor gain is 0 dB in the Processor Frequency Response graph.

3. Processor Response: The variation in output level with frequency for a constant input signal of 0.775 V = 0 dB reference.

4. Beamwidth: Average angle for each 1/3 octave frequency band where, starting from the rear of the loudspeaker, the output first reaches -6 dB SPL referenced to 0 dB SPLas the highest

level. This method means the output may drop below -6 dB SPL within the beamwidth angle. Referenced to 20 m.

5. Impedance: Variation in impedance magnitude, in ohms, with frequency without regard to voltage/current phase. This means the impedance values may not
be used to calculate True Watts (see 9 above).

SIGNAL DIAGRAM

LEGEND

DSP: User-supplied Digital Signal Processor for EQ, crossover, and delay.
HPF: High Pass Filter for crossover or Recommended High Pass Filter.
LPF: Low Pass Filter for crossover.
LF/MF/HF: Low Frequency / Mid Frequency / High Frequency.
AMP: User-supplied Power Amplifier.
XVR: Passive LPFs, HPFs, and EQ integral to the loudspeaker.

PIN 1--...NC
PIN 1+...NC
PIN 2--...LOW-­PIN 2+...LOW+
PIN 3--...MID-­PIN 3+...MID+
PIN 4--...HIGH-­PIN 4+...HIGH+

WHITINSVILLE, MA USA

MANUFACTURED UNDER ONE OR MORE OF THE FOLLOWING U.S. PATENTS: 5,996,728; 6,009,182; 6,016,353; 6,094,495; 6,118,883

NEUTRIK

NL8 MPR

KF850zF

S/N

NEUTRIK

NL8 MPR

3-Way, Tri-Amp (LF, MF, HF)

AMP

DSP

EQ

DELAY

AMP

HPF/LPF

AMP

HF

MF

LF