SB23NRXS45-4
8" Norex Paper Cone Woofer
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Frequency response and impedance
Level in dB (left axis) and impedance in ohm (right axis), 10 Hz to 20 kHz. The line on each switch above shows how its curve is drawn.
Features
- Soft low damping rubber surround for improved transient response
- Shorting ring in motor system for reduced distortion
- Vented pole piece for reduced compression
- Vented cast aluminum chassis for optimum strength and low compression
- Shallow designNon-conducting fiber glass voice coil former for minimum damping
- CCAW voice coil for reduced moving mass
- Long life silver lead wires
Features as listed by SB Acoustics. Full details on sbacoustics.com (opens the SB Acoustics website in a new tab)
Specifications
- Nominal impedance
- 4 Ω
- DC resistance, Re
- 3.3 Ω
- Voice coil inductance, Le
- 0.29 mH
- Free air resonance, Fs
- 27 Hz
- Total Q, Qts
- 0.3
- Electrical Q, Qes
- 0.32
- Mechanical Q, Qms
- 5.55
- Equivalent volume, Vas
- 87.5 L
- Effective piston area, Sd
- 216 cm²
- Linear coil travel (p-p)
- 13 mm
- Moving mass, Mms
- 27.2 g
- Force factor, Bl
- 6.9 Tm
- Compliance, Cms
- 1.33 mm/N
- Mechanical loss, Rms
- 0.8 kg/s
- Sensitivity (2.83 V / 1 m)
- 92 dB
- Rated power handling
- 60 W
Read from the SB Acoustics datasheet. The datasheet marks this data as preliminary data. Check the current datasheet before you rely on a figure.
Design files
SB23NRXS45-4 FRD and ZMA files, in one zip:
- Frequency responses at 0, 30 and 60 degrees (.frd)
- Impedance (.zma)
- A README and a note on how each curve was made
Plain text files for VituixCAD, XSim, REW and most other crossover tools.
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SB23NRXS45-4 FAQ
What are FRD and ZMA files?
An FRD file holds a driver's frequency response and a ZMA file its impedance, the two curves a crossover simulator needs. Plain text, one point per line.
Which software can open the SB23NRXS45-4 files?
VituixCAD, XSim and REW, and most other crossover tools that read plain text.
How was this data made?
It was digitised by Artisan Acoustics from the response and impedance graphs in the SB Acoustics datasheet, so it is not a measurement and not an official SB Acoustics file. Each curve is checked against its graph. The datasheet it came from and the conditions printed on it are in the ABOUT.txt note and in the header of each file inside the zip. Use the files at your own risk.
Why is the phase column zero?
The datasheets print level and impedance but not phase. If your simulator needs phase, derive minimum phase there.
Where can I buy the SB23NRXS45-4 in Singapore or Malaysia?
From Artisan Acoustics, the official SB Acoustics distributor for Singapore and East and West Malaysia. Message us on WhatsApp