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DUAL 15 INCH SUBWOOFER
See NOTES TABULAR DATA for details, half space = floor-mounted
CONFIGURATION
Subsystem
Transducer
Loading
SUB 2x 15 in cone
Vented
Operating Mode
Amplifier Channels
External Signal Processing
DSP w/1-way filter
Single-amp LF1/LF2
Dual-amp LF1, LF2
DSP w/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
(half space) 102 dB
Input Impedance (ohms)
Nominal
36 Hz to 150 Hz
36 Hz to 150 Hz
Minimum
LF1/LF2
LF1, LF2 8 (each)
High Pass Filter
High Pass =>30 Hz, 12 dB/octave Butterworth
Accelerated Life Test 2
4
3.7 @ 150 Hz
7.3 @ 150 Hz (each)
DESCRIPTION
System
LF1/LF2 65 V
1050 W @ 4 ohm
LF1, LF2 65 V (each)
525 W @ 8 ohm (each)
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.
Transducer (AES)
700 W (each)
Calculated Axial Output Limit (SPL)
Average
Peak
133 dB
139 dB
LF1/LF2 (whole space) 127 dB
(half space) 133 dB
ORDERING DATA
Description
Part Number
SB250zR Dual 15 inch Subwoofer Black
Optional Accessories
None
0008864
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 Year Warranty.
1 To achieve specified performance, the listed external signal processing with EAW-provided settings is required.
2 For recommendations to select power amplifier size refer to : “HOW MUCHAMPLIFIER POWER DO I NEED?” on the EAW web site.
Eastern Acoustic Works One Main Street Whitinsville, MA 01588 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
S B 2 5 0 z R S p e c i f i c a t i o n s
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PERFORMANCE DATA
See NOTES GRAPHIC DATA for details
Frequency Response: Processed
LF1/2 Whole Space = green
10
0
-10
-20
-30
-40
-50
10
100
1000
20000
Frequency (Hz)
Frequency Response: Digital Signal Processor
LF = green
Frequency Response: Unprocessed
LF1/2 Whole Space = green
120
110
100
90
20
10
0
-10
-20
-30
80
70
60
-40
10
10
100
1000
20000
100
1000
20000
Frequency (Hz)
Frequency (Hz)
Impedance Magnitude
LF1/2 = green LF1, LF 2 (each) = orange
100
10
1
10
100
1000
20000
Frequency (Hz)
Eastern Acoustic Works One Main Street Whitinsville, MA 01588 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
S B 2 5 0 z R S p e c i f i c a t i o n s
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INPUT PANEL
SIGNAL DIAGRAM
SB250zR
1-Way, Single-Amp (LF1/LF2)
S/N
WHITINSVILLE, MA USA
DSP
EQ
HPF
LF
LF
LIECHTENSTEIN
LIECHTENSTEIN
AMP
LPF
PIN 1--...LF1--
PIN 1+...LF1+
PIN 2--...LF2--
PIN 2+...LF2+
NL4 MPR
NL4 MPR
1-Way, Dual-Amp (LF1, LF2)
AMP
LF
LF
DSP
EQ
HPF
LPF
AMP
LEGEND
DSP:
HPF:
LPF:
User-supplied Digital Signal Processor.
High Pass Filter for crossover or specified High Pass Filter.
Low Pass Filter for crossover.
LF/MF/HF: Low Frequency / Mid Frequency / High Frequency.
AMP:
XVR:
User-supplied Power Amplifier.
Passive LPFs, HPFs, and EQ integral to the loudspeaker.
NOTES
TABULAR DATA
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 True 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: To achieve the specified performance, the listed external signal processing must be used with EAW-provided settings.
12. Operating Range: Range where the processed Frequency Response stays within -10 dB SPLof the power averaged SPLwithin 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 SPLover 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 Test: System: Maximum test input voltage applied with an EIA-426B defined spectrum; measured with specified signal processing; Transducer:AES2-1984 R 1997.
18. CalculatedAxial Output Limit: Highest average and peak SPLs possible during theAccelerated Life Test. The Peak SPLrepresents the 2:1 (6 dB) crest factor of the Life Test signal.
GRAPHIC DATA
1. Resolution: To remove insignificant fine details, 1/12 octave cepstral smoothing was applied to acoustic frequency responses and 1/3 octave cepstral 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 Watts (see 8 above).
Eastern Acoustic Works One Main Street Whitinsville, MA 01588 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
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