EAW Virtural Array KF850ZR User manual

EasternAcoustic Works One Main Street Whitinsville, MA01588 tel [phone] fax [phone] www.eaw.com
EAW products are continually improved. All specifications are therefore subject to change without notice. RD0166 (A) KF850zR SPEC February 2004
KF850zR Specifications group · S
FEATURES
•Tri-amplifiedVA™ 3-way full-rangesystem
•Touringindustrystandard
•Stackableversionwithoutfly-trackhardware; 20% weight savings
•CompanionSB850zRsubwoofer
DESCRIPTION
The KF850 Series has been the touring system standard for well
over ten years, being acceptable in more technical riders than any
otherloudspeaker.TheKF850z incorporates a number ofadvances
in loudspeaker technology and performance developed over that
time by EAW Engineers. The result is a KF850 with higher impact
andfidelity than ever before.
Legendary KF850 performance is enhanced with a neodymium,
Orbital MagnetArray™ HF driver offering increased surface area for
better cooling, and higher reliability. A new HF horn extends HF
responseandfidelitywhileminimizingthroatdistortion.ThecriticalMF
subsystem is based on EAW's Radial Phase Plug™ design used in
the KF650, KF750, and KF760. An optional user-installed, passive
MF/HFcrossoverkitallowsmoreeconomical,bi-amplifiedoperation.
The KF850z's advanced performance will not be sonically
compatible with existing KF850E inventories. To facilitate
integration, kits are available to upgrade them to the KF850z. The
KF850z's enclosure is fully compatible with the KF850E Series.
However, the "z" enclosures incorporate a stacking pad on top that
mateswith a recess in the bottoms. KF850z DSPprocessorsettings
are available online for EAW's MX8750 as well a select group of
otherpopular touring processors.
KF850 Series applications continue to include: concert tours,
corporate events, large theaters, stadiums, cathedrals, large live
musicclubs. Six year warranty.
3-WAY FULL-RANGE TRI-AMP
See TABULAR DATAnotes for details
CONFIGURATION
Subsystem Transducer Loading
LF 1x 15in cone Horn-loaded
MF 1x 10in cone Horn-loaded
Radial Phase Plug™
HF 1x 2in exit, 3 in voice Horn-loaded
coilneodymium compression driver
Operating Mode AmplifierChannels ExternalSignalProcessing
Tri-amp LF,MF, HF DSPw/3-way filters
PERFORMANCE 1
Operating Range 70Hz to 20 kHz
Nominal Beamwidth
Horz 55°
Vert 40°
Axial Sensitivity (wholespace SPL)
LF 101dB 70Hz to 275 kHz
MF 110 dB 275Hz to 1050 Hz
HF 111dB 1050Hz to 20 kHz
Peak Sensitivity (wholespace SPL)
LF 104dB 20Hz to 20 kHz
MF 111dB 20Hz to 20 kHz
HF 116 dB 20Hz 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
HighPass =>60 Hz, 24 dB/octaveButterworth
Accelerated Life Test 2
LF 75V 700W @ 8 ohm
MF 56V 400W @ 8 ohm
HF 40V 200W @ 8 ohm
CalculatedAxial Output Limit (whole spaceSPL)
Average Peak
LF 129dB 135dB
MF 136dB 142dB
HF 134dB 140dB
ORDERING DATA
Description Part Number
KF850zRBlack 0007587
OptionalAccessories
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
* 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 achievespecified performance, thelisted external signalprocessing with EAW-providedsettings is required.
2Forrecommendations to select power amplifier size refer to : “HOW MUCHAMPLIFIERPOWER DOI NEED?” onthe EAWweb site.

EasternAcoustic Works One Main Street Whitinsville, MA01588 tel [phone] fax [phone] www.eaw.com
EAW products are continually improved. All specifications are therefore subject to change without notice. RD0166 (A) KF850zR SPEC February 2004
KF850zR Specifications group · S
ENCLOSURE
Material Balticbirch plywood
Finish Wearresistanttextured black paint
Grille Powder-coatedperforated steel
3.50
16.10
6.50
21.00
42.37
42.00
DIMENSIONS APPLY
TO BOTH SIDES
VIEW A-A
PRODUCTION
11.62
9.50
BOTTOM
FRONT
PALLET RECESS4.25
C
L
BOTTOM ONLY
KF850zR
EASTERN ACOUSTIC WORKS
BACK
NOTES:
1. SYMBOL INDICATES CENTER OF BALANCE.
2. WEIGHT APPROX. 206 LBS.
3. SHIPPING WEIGHT APPROX. 228 LBS.
4X 6.44
2X 22.10
A
A
15.75
19°
29.50
8.50
DIMENSIONS APPLY
TOTOP AND BOTTOM
GRILLE PARTIALLY SHOWN
26.37
TOP
2X 3.28
2X 5.22
L
C
4X 10.81
2X 27.28
(16.50)
9.25
C
L
4.00
ACCESS PANEL
INPUT
8X HANDLE L
C
NOTE: Thisdrawinghas beenreduced. Do notscale.

EasternAcoustic Works One Main Street Whitinsville, MA01588 tel [phone] fax [phone] www.eaw.com
EAW products are continually improved. All specifications are therefore subject to change without notice. RD0166 (A) KF850zR SPEC February 2004
KF850zR Specifications group · S
PERFORMANCE DATA See NOTES GRAPHIC DATANotes 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
1100 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)

EasternAcoustic Works One Main Street Whitinsville, MA01588 tel [phone] fax [phone] www.eaw.com
EAW products are continually improved. All specifications are therefore subject to change without notice. RD0166 (A) KF850zR SPEC February 2004
KF850zR Specifications group · S
INPUT PANEL
KF850zR
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
TABULARDATA
1. PrimaryMeasurement/DataProcessingSystem: FChart:proprietary EAWsoftware.
2. SecondaryMeasurement System: Brüel &Kjær 2012.
3. MicrophoneSystems: EarthworksM30; Brüel& Kjær 4133
4. Measurements: DualchannelFFT;length: 32768 samples; samplerate: 48kHz;logarithmic sinewave sweep.
5.Measurement System Qualification (includes all uncertainties):SPL:accuracy+/-0.2 dB@1 kHz,precision +/-0.5 dB20 Hzto20 kHz,resolution 0.05 dB;Frequency: accuracy+/-1%,
precision+/-0.1Hz,resolution the largerof1.5 Hz or1/48octave;Time:accuracy+/-10.4 µs, precision+/-0.5µs, resolution 10.4µs;Angular:accuracy+/-1°,precision+/-0.5°,resolution0.5°.
6. Environment: Measurementstime-widowedandprocessed toeliminate room effects,approximatingananechoic environment. Dataprocessedas anechoicor fractional space,asnoted.
7. MeasurementDistance: 7.6to8.0m. Datais referencedto other distancesusingthe InverseSquareLaw.
8. Volts: Measuredrmsvalue ofthe test signal.
9. Watts: Peraudioindustrypractice, “loudspeakerwatts”are calculated asvoltagesquared dividedbyrated nominalimpedance. Thus, thesearenotTrueWattunitsof energyas defined by
InternationalStandard.
10. SPL: (SoundPressureLevel) Equivalentto the averagelevel ofasignal referencedto 0 dBSPL=20microPascals.
11.Subsystem: Thisliststhe transducer(s)andtheir acousticloading for eachpassband.Sub =Subwoofer,LF =Low Frequency,MF = MidFrequency,HF = HighFrequency.
12.Operating Mode: User selectableconfigurations.Betweensystemelements,acomma(,)= separateamplifierchannels;a slash (/) =singleamplifierchannel.DSP=DigitalSignalProcessor.
IMPORTANT:Toachievethespecified performance,the listed externalsignal processing mustbe usedwith EAW-providedsettings.
13.Operating Range: Range wherethe processed FrequencyResponse stayswithin-10dB SPLofthepoweraveraged SPLwithinthisrange;measured on the geometric axis.Narrow band
dipsareexcepted.
14.Nominal Beamwidth: Designanglefor the-6 dB SPLpoints,referencedto0dB SPLasthehighestlevel.
15.AxialSensitivity: PoweraveragedSPLovertheOperating Rangewith an inputvoltagethat would produce1 Wat the nominalimpedance; measured with no externalprocessing on the
geometricaxis,referenced to1 m.
16.Peak Sensitivity: Highestaxial SPLmeasuredwithin the20Hz to20 kHz bandpasswithaninput voltagethatwouldproduce 1W at thenominal impedance;measured with noexternal
processingonthe geometricaxis, referenced to1 m.
17.Nominal Impedance: Selected 4,8, or 16ohm resistancesuchthatthe minimumimpedance point isno morethan20% belowthis resistance over theOperating Range.
18.AcceleratedLifeTest: Maximumtestinputvoltageapplied withan EIA-426B definedspectrum; measured withrecommended signalprocessing and RecommendedProtection Filter.
19.CalculatedAxialOutput Limit: Highest average andpeak SPLspossibleduring theAcceleratedLifeTest. ThePeakSPLrepresentsthe2:1(6 dB)crestfactor ofthe Life Testsignal.
20.Recommended High Pass Filter: This should beused to helpprotect theloudspeaker from excessiveinput signal levelsbelow theOperating Range.
GRAPHICDATA
1.Resolution:To removeinsignificantfine details,1/12octavecepstralsmoothing was appliedto acousticfrequencyresponse and1/3 octave cepstralsmoothingwasapplied tothe
beamwidthandimpedancedata. Othergraphs areplotted using rawdata.
2.Frequency Responses: The variationinacoustic outputlevel with frequencyfor aconstantinputsignal of2 volts (4 ohmnominal impedance),2.83volts (8 ohmnominal impedance),
or4volts(16 ohmnominal impedance) referencedto adistanceof1 m.For processed systems,this applieswherethe processorgain is 0dB intheProcessor FrequencyResponse graph.
3.Processor Response: The variationinoutput levelwith frequency fora constantinputsignalof 0.775V = 0dB reference.
4.Beamwidth:Averageangleforeach 1/3octavefrequencyband where,startingfrom the rearof theloudspeaker,the outputfirst reaches -6dB SPLreferenced to0 dB SPLasthehighest
level.Thismethodmeans theoutputmay dropbelow -6 dBSPLwithinthebeamwidth angle. Referencedto 20 m.
5.Impedance: Variationin impedance magnitude,in ohms,withfrequency withoutregard to voltage/currentphase.Thismeans the impedancevalues maynot
beusedto calculateTrueWatts(see9above).
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 PowerAmplifier.
XVR: Passive LPFs, HPFs, and EQ integral to the loudspeaker.