S B 4 8 z P S p e c i f i c a t i o n s
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DUAL 8 INCH SUBWOOFER
See NOTES TABULAR DATA for details, half space = floor-mounted
CONFIGURATION
Subsystem
Transducer
Loading
SUB 2x 8 in cone
Vented
Operating Mode
Amplifier Channels
External Signal Processing
Single-amp LF
DSP w/1-way filter
PERFORMANCE 1
Operating Range
31 Hz to 141 Hz
Nominal Beamwidth
Horz 360°
Vert 360°
Axial Sensitivity (SPL)
LF (whole space) 88 dB
(half space) 94 dB
31 Hz to 141 Hz
31 Hz to 141 Hz
Input Impedance (ohms)
Nominal
Minimum
LF
Recommended High Pass Filter
High Pass =>30 Hz, 12 dB/octave Butterworth
Accelerated Life Test 2
8
7.9 @ 141 Hz
System
LF 57 V
200 W (each)
400 W @ 8 ohm
Transducer (AES)
DESCRIPTION
Calculated Axial Output Limit (SPL)
Average
Peak
120 dB
126 dB
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.
LF(whole space) 114 dB
(half space) 120 dB
ORDERING DATA
Description
Part Number
0011511
SB48zP Dual 8 inch Subwoofer Black
SB48zP Dual 8 inch Subwoofer White
SB48zP Dual 8 inch Subwoofer Black WP
Optional Accessories
0014010
0011807
3/8-16 Forged Shoulder Eyebolt
104001
The SB48zP is a highly compact subwoofer system optimized
for permanent installation. Its small size allows placement in tight
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
retail spaces.
The SB48zP 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: RD0223 (A) SB48zP April 2005
Download from Www.Somanuals.com. All Manuals Search And Download.
S B 4 8 z P 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
LF 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
LF 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
LF = green
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: RD0223 (A) SB48zP April 2005
Download from Www.Somanuals.com. All Manuals Search And Download.
S B 4 8 z P S p e c i f i c a t i o n s
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INPUT PANEL
SIGNAL DIAGRAM
1-Way, Single-Amp (LF1/LF2)
SB48zP
S/N
WHITINSVILLE, MA USA
LF
LF
DSP
EQ
AMP
LPF
LOOP THRU
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: RD0223 (A) SB48zP April 2005
Download from Www.Somanuals.com. All Manuals Search And Download.
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