SB12PFCR25-4
4" Paper Cone Midwoofer
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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
- Vented reinforced plastic chassis
- Proprietary cone material with natural fibers made in-house
- Butyl rubber surround for smooth frequency response
- Vented motor system for low compression
- Long stroke linear suspension for improved dynamics
- Non-resonant long life 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
- 3.1 Ω
- Voice coil inductance, Le
- 0.26 mH
- Free air resonance, Fs
- 58 Hz
- Total Q, Qts
- 0.43
- Electrical Q, Qes
- 0.49
- Mechanical Q, Qms
- 3.4
- Equivalent volume, Vas
- 5.2 L
- Effective piston area, Sd
- 50 cm²
- Linear coil travel (p-p)
- 9.8 mm
- Moving mass, Mms
- 5.3 g
- Force factor, Bl
- 3.5 Tm
- Compliance, Cms
- 1.42 mm/N
- Mechanical loss, Rms
- 0.6 kg/s
- Sensitivity (2.83 V / 1 m)
- 87.5 dB
- Rated power handling
- 30 W
Read from the SB Acoustics datasheet. Check the current datasheet before you rely on a figure.
Design files
SB12PFCR25-4 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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SB12PFCR25-4 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 SB12PFCR25-4 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 SB12PFCR25-4 in Singapore or Malaysia?
From Artisan Acoustics, the official SB Acoustics distributor for Singapore and East and West Malaysia. Message us on WhatsApp