Eastern Acoustic Works One Main S treet Whitinsville, MA01588 tel 800 992 5013 / 508 234 6158 fax 508 234 8251 www.eaw .com
EAW products are continually improved. All specifications are therefore subject to change without notice. Part Number: RD0227 (A) SB250zR April 2005
SB250zR Specifications group · J
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, engineered by EAW , provide the highest output and best
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
construction are required.
The SB250zR is a high output, mid-size subwoofer system. This
versatile, all-purpose subwoofer is designed for portable use
where the solid-sounding output of dual 15 inch drivers is
desired. The SB250zR works well with most full-range
loudspeakers in a variety of applications including: band/club
PA, small houses of worship, small auditoriums/theaters, A/V
systems, hotel ballrooms, meeting rooms, classrooms, exhibit
areas, f/x reinforcement, cruise ships, small dance clubs, DJ
monitoring, and drum-fill monitoring.
The SB250zR is designed to be used with today's sophisticated
digital signal processing to optimize the LF response. EAW's MX
Series processors are recommended for the required crossover
and equalization.
Six Y ear Warranty .
DUAL 15 INCH SUBWOOFER
See NOTES T ABULAR DAT Afor details, half space = floor-mounted
CONFIGURA TION
Subsystem
Transducer Loading
SUB 2x 15 in cone Vented
Operating Mode
Amplifier Channels External Signal Processing
Single-amp LF1/LF2 DSPw/1-way filter
Dual-amp LF1, LF2 DSPw/1-way filter
PERFORMANCE
1
Operating Range 36 Hz to 150 Hz
Nominal Beamwidth
Horz 360°
Vert 360°
Axial Sensitivity (SPL)
LF1/LF2 (whole space)96 dB 36 Hz to 150 Hz
(half space) 102 dB 36 Hz to 150 Hz
Input Impedance (ohms)
Nominal Minimum
LF1/LF2 4 3.7 @ 150 Hz
LF1, LF2 8 (each) 7.3 @ 150 Hz (each)
High Pass Filter
High Pass =>30 Hz, 12 dB/octave Butterworth
Accelerated Life Test
2
System LF1/LF2 65 V 1050 W @ 4 ohm
LF1, LF2 65 V (each) 525 W @ 8 ohm (each)
Transducer (AES) 700 W (each)
Calculated Axial Output Limit (SPL)
Average Peak
LF1/LF2 (whole space)127 dB 133 dB
(half space) 133 dB 139 dB
ORDERING DA T A
Description Part Number
SB250zR Dual 15 inch Subwoofer Black 0008864
Optional Accessories
None
1 To achieve specified performance, the listed external signal processing with EA W-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 S treet Whitinsville, MA01588 tel 800 992 5013 / 508 234 6158 fax 508 234 8251 www.eaw .com
EAW products are continually improved. All specifications are therefore subject to change without notice. Part Number: RD0227 (A) SB250zR April 2005
SB250zR Specifications group · J
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.
EASTERN ACOUSTIC W ORKS
L
C
INPUT
3.63
[92.2]
6.63
7.18
[168.4]
BACK
[182.5]
8X METAL CORNERS
2. SYMBOL INDICATES CENTER OF BALANCE.
3. WEIGHT APPROX. 112 lb [50.8]
4. SHIPPING WEIGHT APPROX. 122 lb [55.3]
NOTES:
14.50
[368.3]
6.44
[163.6]
4.03
[102.4]
RIGHT SIDE
1.72
[43.6]
SB250zR
19.62
[498.3]
8.50
[215.9]
L
C
24.56
24.98
[623.8]
[634.5]
10.81
[274.6]
2X HANDLE
30.18
[766.6]
29.75
[755.7]
PRODUCTION
TO BOTH SIDES
DIMENSIONS APPLY
FRONT
TOP/BOTTOM
GRILLE PARTIALLY SHOWN
Eastern Acoustic Works One Main S treet Whitinsville, MA01588 tel 800 992 5013 / 508 234 6158 fax 508 234 8251 www.eaw .com
EAW products are continually improved. All specifications are therefore subject to change without notice. Part Number: RD0227 (A) SB250zR April 2005
SB250zR Specifications group · J
PERFORMANCE DA T A
See NOTES GRAPHIC DAT Afor 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)
Eastern Acoustic Works One Main S treet Whitinsville, MA01588 tel 800 992 5013 / 508 234 6158 fax 508 234 8251 www.eaw .com
EAW products are continually improved. All specifications are therefore subject to change without notice. Part Number: RD0227 (A) SB250zR April 2005
SB250zR Specifications group · J
INPUT P ANEL
NL4 MPR
NL4 MPR
NOTES
TABULAR DA T A
1. Measurement/Data Processing Systems: Primary -FChart: proprietary EAW software; Secondary - Brüel & Kjær 2012.
2. Microphone Systems: Earthworks M30; Brüel & Kjær 4133
3. Measurements: Dual channel FFT; length: 32 768 samples; sample rate: 48 kHz; logarithmic sine wave sweep.
4. 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°.
5. Environment: Measurements time-widowed and processed to eliminate room effects, approximating an anechoic environment. Data processed as anechoic or fractional space, as noted.
6. Measurement Distance: 7.46 m. Acoustic responses represent complex summation of the subsystems at 20 m. SPLis referenced to other distances using the Inverse Square Law.
7. Volts: Measured rms value of the test signal.
8. Watts: Per audio industry practice, “loudspeaker watts” are calculated as voltage squared divided by rated nominal impedance. Thus, these are not T rue Watt units of energy as defined by
International Standard.
9. SPL: (Sound Pressure Level) Equivalent to the average level of a signal referenced to 0 dB SPL= 20 microPascals.
10. Subsystem: This lists the transducer(s) and their acoustic loading for each passband. Sub = Subwoofer, LF = Low Frequency , MF = Mid Frequency , HF = High Frequency .
11. Operating Mode: User selectable configurations. Between system elements, a comma (,) = separate amplifier channels; a slash (/) = single amplifier channel. DSP= Digital Signal Processor.
IMPORTANT: T o achieve the specified performance, the listed external signal processing must be used with EA W-provided settings.
12. Operating Range: Range where the processed Frequency Response stays within -10 dB SPLof the power averaged SPL within this range; measured on the geometric axis. Narrow band
dips are excepted.
13. Nominal Beamwidth: Design angle for the -6 dB SPLpoints, referenced to 0 dB SPLas the highest level.
14. 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.
15. 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.
16. High Pass Filter: This helps protect the loudspeaker from excessive input signal levels at frequencies below the Operating Range.
17. Accelerated Life T est: System: Maximum test input voltage applied with an EIA-426B defined spectrum; measured with specified signal processing; Transducer: AES2-1984 R 1997.
18. Calculated Axial Output Limit: Highest average and peak SPLs possible during the Accelerated Life T est. The Peak SPLrepresents the 2:1 (6 dB) crest factor of the Life T est signal.
GRAPHIC DAT A
1. Resolution:To remove insignificant fine details, 1/12 octave cepstral smoothing was applied to acoustic frequency responses and 1/3 octave cep stral smoothing was applied to the
beamwidth and impedance data. Other graphs are plotted using raw data.
2. Frequency Responses:Variation in acoustic output level with frequency for a constant input signal. Processed: normalized to 0 dB SPL. Unprocessed inputs: 2 V (4 ohm nominal impedance),
2.83 V (8 ohm nominal impedance), or 4 V (16 ohm nominal impedance) referenced to a distance of 1 m.
3. Processor Response:The variation in output level with frequency for a constant input signal of 0.775 V = 0 dB reference.
4. 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 Watt s (see 8 above).
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 Power Amplifier .
XVR: Passive LPFs, HPFs, and EQ integral to the loudspeaker.
WHITINSVILLE, MA USA
LIECHTENSTEIN
NL4 MPR
SB250zR
S/N
LIECHTENSTEIN
NL4 MPR
PIN 1--...LF1-PIN 1+...LF1+
PIN 2--...LF2-PIN 2+...LF2+
1-Way, Single-Amp (LF1/LF2)
DSP
EQ
HPF
LPF
1-Way, Dual-Amp (LF1, LF2)
DSP
EQ
HPF
LPF
AMP
AMP
AMP
LF
LF
LF
LF
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