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.
1To achieve specified performance, the listed external signal processing with EAW-provided settings is required.
2For 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
3.50
16.10
21.50
6.50
42.00
42.37
VIEW A-A
PRODUCTION
DIMENSIONS APPLY
TO BOTH SIDES
9.50
BOTTOM
8.38
PALLET RECESS
FRONT
4.25
L
C
BOTTOM ONLY
KF850zF
EASTERN ACOUSTIC W ORKS
BACK
2X 22.10
4X 6.44
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 19.25
8.50
16.00
29.50
2X 2.27
2X 7.43 19°
A
A
GRILLE PARTIALLY SHOWN
DIMENSIONS APPLY
TO TOP AND BOTTOM
26.37
TOP
2X 3.28
2X 5.22
4X 10.81
2X 27.28
L
C
(16.50)
9.25
4.00
L
C
INPUT
ACCESS PANEL
8X HANDLE L
C
NOTE: This drawing has been reduced. Do not scale.

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
KF850zF
WHITINSVILLE, MA USA S/N
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
PIN 1--...NC
PIN 1+...NC
PIN 2--...LOW--
PIN 2+...LOW+
PIN 3--...MID--
PIN 3+...MID+
PIN 4--...HIGH--
PIN 4+...HIGH+
NEUTRIK
NL8 MPR
NEUTRIK
NL8 MPR
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 SPL as 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).
3-Way, Tri-Amp (LF, MF, HF)
AMP
AMP
AMP LF
MF
HF
DSP
EQ
DELAY
HPF/LPF
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.