EAW SB48zP 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: RD0223 (A) SB48zP April 2005
SB48zP 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.
The SB48zP is a highly compact subwoofer system optimized
forpermanentinstallation.Itssmallsizeallowsplacementintight
places while providing the extremely low frequency response of
much larger systems. While the SB48zP works well with most
full-range loudspeakers, its most frequent uses are in high
quality multi-media systems. These applications include: A/V
systems, meeting rooms, classrooms, exhibit areas, f/x
reinforcement, cruise ships, TV studios, restaurants, and small
retailspaces.
The SB48zP is designed to be used with today's sophisticated
digitalsignalprocessingtooptimizetheLFresponse.EAW'sMX
Series processors are recommended for the required crossover
andequalization.
SixYearWarranty.
DUAL 8 INCH SUBWOOFER
See NOTES TABULAR DATA for details, half space = floor-mounted
CONFIGURATION
Subsystem Transducer Loading
SUB 2x8incone Vented
Operating Mode AmplifierChannels ExternalSignalProcessing
Single-amp LF DSPw/1-wayfilter
PERFORMANCE 1
Operating Range 31Hzto141Hz
Nominal Beamwidth
Horz 360°
Vert 360°
Axial Sensitivity (SPL)
LF(wholespace) 88dB 31Hzto141Hz
(halfspace) 94dB 31Hzto141Hz
Input Impedance (ohms)
Nominal Minimum
LF 8 7.9@141Hz
Recommended High Pass Filter
HighPass =>30Hz,12dB/octaveButterworth
Accelerated Life Test 2
System LF 57V 400W@8ohm
Transducer(AES) 200W(each)
CalculatedAxial Output Limit (SPL)
Average Peak
LF(wholespace) 114dB 120dB
(halfspace) 120dB 126dB
ORDERING DATA
Description Part Number
SB48zPDual8inchSubwoofer Black 0011511
SB48zPDual8inchSubwoofer White 0014010
SB48zPDual8inchSubwoofer Black WP 0011807
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: RD0223 (A) SB48zP April 2005
SB48zP Specifications group · I
ENCLOSURE
Material Balticbirchplywood
Finish Wearresistant textured black paint
Grille Powder-coatedperforatedsteel
3.00
6.25
10.25
DIMENSIONS APPLY
TO BOTH SIDES
RIGHT SIDE
12.46
GRILLE PARTIALLY SHOWN
FRONT
BOTTOM
[158.8]
22.39
18.71
TOP
8.00
[203.2]
[568.7]
[475.2] 3.00
19.75
[76.2]
[50.0]
[316.5]
[76.2]
1.97
[260.4]
10.25 [501.7]
INPUT
5.00
SB48zP
PRODUCTION EASTERN ACOUSTIC W ORKS
BACK
[127.0]
13.63
9.65
6.23
NOTES:
1. SYMBOL INDICATES MOUNTING POINT,
3/8-16 THREADED HOLE (NUT PLATE).
2. SYMBOL INDICATES MOUNTING POINT,
3/8-16 THREADED HOLE (PI ANGLE).
3. SYMBOL INDICATES CENTER OF BALANCE. 4. WEIGHT APPROX. 52 lb [23.6 kg] 5. SHIPPING WEIGHT APPROX. 57 lb [25.8 kg]
[346.2]
[245.1]
[260.4]
[158.2]
4.00
2.92
[101.6]
[74.2]
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: RD0223 (A) SB48zP April 2005
SB48zP Specifications group · I
PERFORMANCE DATA
See NOTES GRAPHIC DATA for details
Frequency Response: Processed
LF Whole Space = green
SPL(dB)
Frequency Response: Unprocessed
LF Whole Space = green
SPL(dB)
Frequency Response: Digital Signal Processor
LF = green
dB re 0.775 V
Impedance Magnitude
LF = green
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: RD0223 (A) SB48zP April 2005
SB48zP Specifications group · I
INPUT PANEL
WHITINSVILLE, MA USA S/N
-- +-- +
LOOP THRU
SB48zP
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 at 20 m. 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 (/) = singleamplifierchannel.DSP=DigitalSignalProcessor.
IMPORTANT:Toachievethe specified performance,thelistedexternal signal processingmustbeusedwith EAW-provided settings.
12.Operating Range: Range wheretheprocessedFrequencyResponse stayswithin -10 dBSPLof thepoweraveragedSPLwithinthisrange; measuredonthegeometricaxis. Narrowband
dipsareexcepted.
13.Nominal Beamwidth: Designanglefor the-6dBSPLpoints,referencedto0 dB SPLas the 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:AES2-1984R 1997.
18.CalculatedAxialOutput Limit: Highest average andpeakSPLspossible during theAcceleratedLifeTest. ThePeak SPLrepresentsthe2:1 (6dB)crestfactorof 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.Unprocessedinputs:2 V (4ohmnominalimpedance),
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 8above).
DSP
EQ
LPF
1-Way, Single-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.