EAW SB250zP 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. Part Number: RD0310 (A) SB250zP April 2005
SB250zP Specifications group · I
DESCRIPTION
The SB products are EAW's premium subwoofers designed for
the most demanding professional applications.Abroad range of
capabilities and sizes provide the designer with selections that
can be specifically matched to their application. Top quality
drivers,engineeredbyEAW,providethehighestoutputandbest
sonic performance possible for a given form factor. All SB
models are direct radiating, with optimally tuned, vented
enclosures. SB subwoofers are the choice where the best sonic
performance, highest reliability, and most robust physical
constructionarerequired.
TheSB250zPis a high output, mid-size subwoofer system.This
versatile, all-purpose subwoofer is designed for permanent
installation where the solid-sounding output of dual 15 inch
drivers is desired. The SB250zPworks well with most full-range
loudspeakersinavariety ofapplicationsincluding:smallhouses
of worship, small auditoriums/theaters, A/V systems, hotel
ballrooms, meeting rooms, classrooms, exhibit areas, f/x
reinforcement,cruiseships,cinemas, andsmalldance clubs.
The SB250zP is designed to be used with today's sophisticated
digitalsignalprocessingtooptimizetheLFresponse.EAW'sMX
Series processors are recommended for the required crossover
andequalization.
SixYearWarranty.
DUAL 15 INCH SUBWOOFER
See NOTES TABULAR DATA for details, half space = floor-mounted
CONFIGURATION
Subsystem Transducer Loading
SUB 2x15incone Vented
Operating Mode AmplifierChannels ExternalSignalProcessing
Single-amp LF1/LF2 DSPw/1-wayfilter
Dual-amp LF1,LF2 DSPw/1-wayfilter
PERFORMANCE 1
Operating Range 36Hzto150Hz
Nominal Beamwidth
Horz 360°
Vert 360°
Axial Sensitivity (SPL)
LF1/LF2(wholespace)96dB 36Hzto150Hz
(halfspace) 102dB 36Hzto150Hz
Input Impedance (ohms)
Nominal Minimum
LF1/LF2 4 3.7@150Hz
LF1,LF2 8 (each) 7.3@150Hz(each)
High Pass Filter
HighPass =>30Hz,12dB/octaveButterworth
Accelerated Life Test 2
System LF1/LF2 65V 1050W@4ohm
LF1,LF2 65V(each) 525W@8ohm(each)
Transducer(AES) 700W(each)
CalculatedAxial Output Limit (SPL)
Average Peak
LF1/LF2(wholespace)127dB 133dB
(halfspace) 133dB 139dB
ORDERING DATA
Description Part Number
SB250zPDual15inchSubwoofer Black 0008964
SB250zPDual15inchSubwoofer White 0011318
SB250zPDual15inchSubwoofer Black WP 0009050
OptionalAccessories
3/8-16 Forged Shoulder Eyebolt 104001
1Toachieve specifiedperformance,the listedexternalsignal processingwithEAW-providedsettingsis required.
2Forrecommendations toselectpower amplifiersize 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. Part Number: RD0310 (A) SB250zP April 2005
SB250zP Specifications group · I
ENCLOSURE
Material Balticbirchplywood
Finish Wearresistant textured black paint
Grille Powder-coatedperforatedsteel
3.25
DIMENSIONS APPLY
TO BOTH SIDES
RIGHT SIDE
13.16
25.81
29.75
GRILLE PARTIALLY SHOWN
FRONT
[755.6] [655.6] C
L
24.56
TOP/BOTTOM 3.25
13.16
8.50
[623.8]
[530.4]
C
L
[215.9]
20.88
19.62
[82.6]
[82.6] SB250zP
[498.3]
[334.2]
INPUT
[165.1]
[127.0]
6.50 5.00
[101.6]
PRODUCTION
[381.0]
15.00
4.00
BACK
EASTERN ACOUSTIC W ORKS
NOTES:
1. SYMBOL INDICATES MOUNTING POINT,
3/8-16 THREADED HOLE (PI ANGLE).
2. SYMBOL INDICATES CENTER OF BALANCE. 3. WEIGHT APPROX. 112 lbs [50.8 kgs] 4. SHIPPING WEIGHT APPROX. 122 lbs [55.3 kgs]
[334.2] L
C
NOTES: Thisdrawinghas beenreduced.Donotscale.
ForWPversion, add0.25 in/6.4mm tothe outside dimensions =0.125in/ 3.2 mmallaround.

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. Part Number: RD0310 (A) SB250zP April 2005
SB250zP Specifications group · I
PERFORMANCE DATA
See NOTES GRAPHIC DATA for details
Frequency Response: Processed
LF1/2 Whole Space = green
SPL(dB)
Frequency Response: Unprocessed
LF1/2 Whole Space = green
SPL(dB)
Frequency Response: Digital Signal Processor
LF = green
dB re 0.775 V
Impedance Magnitude
LF1/2 = green LF1, LF 2 (each) = orange
Ohms
120
110
100
90
80
70
60
100
10
1
10 100 1000 20000
Frequency (Hz)
10
0
-10
-20
-30
-40
-50
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. Part Number: RD0310 (A) SB250zP April 2005
SB250zP Specifications group · I
INPUT PANEL
WHITINSVILLE, MA USA S/N
-- +-- +
-- +-- +
LF1 LF2
LF1 LF2
LOOP THRU
SB250zP
NOTES
TABULAR DATA
1. Measurement/DataProcessingSystems: Primary-FChart: proprietaryEAWsoftware;Secondary- Brüel& Kjær2012.
2. MicrophoneSystems: EarthworksM30; Brüel&Kjær4133
3. Measurements: DualchannelFFT;length:32 768 samples;samplerate:48 kHz; logarithmicsinewavesweep.
4.Measurement System Qualification(includesalluncertainties):SPL:accuracy+/-0.2 dB@1kHz,precision +/-0.5dB20Hzto 20kHz,resolution0.05dB; Frequency:accuracy+/-1%,
precision+/-0.1Hz,resolution the largerof1.5Hzor1/48octave;Time:accuracy+/-10.4µs,precision+/-0.5µs,resolution 10.4µs;Angular: accuracy+/-1°,precision+/-0.5°,resolution0.5°.
5. Environment: Measurementstime-widowedandprocessed toeliminateroomeffects,approximatingananechoic environment.Dataprocessedasanechoicor fractionalspace,asnoted.
6. MeasurementDistance: 7.46m.Acousticresponsesrepresentcomplexsummationofthesubsystems at20m. SPLisreferencedtootherdistancesusingtheInverseSquareLaw.
7. Volts: Measuredrmsvalue ofthetestsignal.
8. Watts: Per audioindustrypractice,“loudspeaker watts” are calculatedasvoltagesquareddivided by ratednominalimpedance. Thus,these arenotTrueWattunitsofenergyasdefined by
InternationalStandard.
9. SPL: (SoundPressureLevel) Equivalenttotheaveragelevel ofasignalreferencedto 0dBSPL= 20microPascals.
10.Subsystem: Thisliststhe transducer(s)andtheiracousticloading foreachpassband.Sub=Subwoofer,LF=LowFrequency,MF = MidFrequency, HF =HighFrequency.
11.Operating Mode: Userselectableconfigurations.Betweensystemelements,acomma(,)=separateamplifierchannels;aslash (/) = singleamplifier channel. DSP=DigitalSignalProcessor.
IMPORTANT:Toachievethe specified performance,thelistedexternal signal processingmustbeusedwith EAW-provided settings.
12.Operating Range: Range wheretheprocessedFrequencyResponse stayswithin -10 dBSPLof thepoweraveragedSPLwithinthisrange; measured onthegeometricaxis. Narrow band
dipsareexcepted.
13.Nominal Beamwidth: Designanglefor the-6dBSPLpoints,referencedto0 dB SPLasthe highestlevel.
14.AxialSensitivity: PoweraveragedSPLovertheOperating Rangewithaninputvoltagethat wouldproduce1Wat thenominalimpedance;measuredwith noexternalprocessingonthe
geometricaxis,referenced to1m.
15.Nominal Impedance: Selected 4,8,or16ohm resistancesuch that theminimumimpedancepoint is nomorethan20% below thisresistanceovertheOperating Range.
16.High Pass Filter: Thishelpsprotecttheloudspeakerfrom excessiveinputsignallevelsat frequenciesbelowtheOperatingRange.
17.AcceleratedLifeTest: System: Maximumtestinputvoltageapplied with anEIA-426Bdefinedspectrum; measured withspecifiedsignalprocessing;Transducer:AES2-1984R1997.
18.CalculatedAxialOutput Limit: Highest average andpeakSPLspossible during theAccelerated LifeTest. The PeakSPLrepresentsthe 2:1 (6dB)crestfactor of theLifeTestsignal.
GRAPHICDATA
1.Resolution:Toremoveinsignificant finedetails,1/12octavecepstralsmoothingwasapplied toacousticfrequencyresponsesand 1/3octavecepstralsmoothingwasapplied to the
beamwidthandimpedancedata. Othergraphs areplottedusingrawdata.
2.Frequency Responses: Variationinacousticoutputlevelwithfrequencyforaconstantinputsignal.Processed:normalizedto 0 dB SPL.Unprocessed inputs:2V (4 ohm nominalimpedance),
2.83V(8 ohmnominalimpedance),or4 V(16ohmnominalimpedance) referencedtoadistanceof1 m.
3.Processor Response: The variationinoutputlevelwith frequencyforaconstantinputsignal of0.775V=0 dB reference.
4.Impedance: Variationin impedance magnitude,inohms,with frequency withoutregardtovoltage/currentphase.Thismeans theimpedancevaluesmay not
beusedto calculateTrueWatts(see 8 above).
DSP
EQ
HPF
LPF
1-Way, Single-Amp (LF1/LF2)
LF
AMP
LF
DSP
EQ
HPF
LPF
AMP
1-Way, Dual-Amp (LF1, LF2)
LF
AMP LF
SIGNAL DIAGRAM
LEGEND
DSP: User-supplied Digital Signal Processor.
HPF: High Pass Filter for crossover or specified 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.