Car subwoofer simulator
Compare SB Acoustics woofers. Swipe to browse; tick up to 3 to compare.
10-inch shallow subwoofer
SW26DBAC76-410 inch · 4 Ω · 200 W IEC rated
View product photoEstimated bass output
Favourable car setup · 20 Hz protection filter
Example outside box: 450 × 320 × 391 mm
18 mm board · 1.7 L estimated space for internal parts.
10-inch subwoofer
SB29SWNRX-S75-610 inch · 6 Ω · 200 W IEC rated
View product photoEstimated bass output
Favourable car setup · 20 Hz protection filter
Example outside box: 450 × 320 × 268 mm
18 mm board · 5.0 L estimated space for internal parts.
12-inch subwoofer
SB34SWPL76-412 inch · 4 Ω · 300 W IEC rated
View product photoEstimated bass output
Favourable car setup · 20 Hz protection filter
Example outside box: 450 × 360 × 362 mm
18 mm board · 8.2 L estimated space for internal parts.
8-inch subwoofer
SB23MFCL45-48 inch · 4 Ω · 150 W IEC rated
View product photoEstimated bass output
Favourable car setup · 20 Hz protection filter
Example outside box: 450 × 320 × 259 mm
18 mm board · 4.3 L estimated space for internal parts.
10-inch shallow subwoofer
SW26SFC38-410 inch · 4 Ω · 80 W IEC rated
View product photoEstimated bass output
Favourable car setup · 20 Hz protection filter
Example outside box: 450 × 320 × 318 mm
18 mm board · 5.8 L estimated space for internal parts.
12-inch subwoofer
SB34SWNRX-S75-612 inch · 6 Ω · 200 W IEC rated
View product photoEstimated bass output
Favourable car setup · 20 Hz protection filter
Example outside box: 450 × 360 × 701 mm
18 mm board · 14.1 L estimated space for internal parts.
15-inch subwoofer
SB42FHCL75-615 inch · 6 Ω · 300 W IEC rated
View product photoEstimated bass output
Favourable car setup · 20 Hz protection filter
Example outside box: 460 × 440 × 1325 mm
18 mm board · 33.7 L estimated space for internal parts.
9.5-inch subwoofer
WO24P-49.5 inch · 4 Ω · 90 W IEC rated
View product photoEstimated bass output
Favourable car setup · 20 Hz protection filter
Example outside box: 450 × 320 × 698 mm
18 mm board · 11.4 L estimated space for internal parts.
9.5-inch subwoofer
WO24TX-49.5 inch · 4 Ω · 90 W IEC rated
View product photoEstimated bass output
Favourable car setup · 20 Hz protection filter
Example outside box: 450 × 320 × 520 mm
18 mm board · 8.7 L estimated space for internal parts.
13.5-inch subwoofer
WO34HC-413.5 inch · 4 Ω · 200 W IEC rated
View product photoEstimated bass output
Favourable car setup · 20 Hz protection filter
Example outside box: 450 × 400 × 380 mm
18 mm board · 10.3 L estimated space for internal parts.
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Estimated bass output
Adjust comparison power
Box size options · will it fit my boot?
Box plan
Outside box dimensions. Enter the clear space available, allowing room for cables and loading through the boot opening.
This checks the outer box only. Check woofer depth, cut-out, rear clearance and port space before cutting wood. The dashed opening is a port concept only: its size and position are not calculated. A ported box still needs a complete port design.
Optional panel list · sealed boxes
Simple butt joints: full-size top/bottom; front/back between them; sides between front/back. Sizes exclude saw kerf. No driver hole, bracing or double baffle is specified. Verify joints and clearances with your installer.
Check my existing box
Enter outside dimensions of a rectangular box.
Subtract the parts inside the box. Enter your estimate if unmeasured.
Uniform wall thickness. Check woofer and port fit against the drawing.
Advanced box & amplifier settings
Selected driver
F3 / F6 show how low the box plays before car gain or filtering. Qtc applies to sealed boxes.
Full woofer specifications
Car settings
Starts with favourable sedan/SUV conditions: good bass transfer into the cabin and no added boot loss.
Increase this for a closed boot that blocks bass above 60 Hz.
Dashed lines show the van estimate. It is provisional, not based on measurements of your vehicle.
Video: the calculator in action
Common questions
What size box do I need for a 12-inch subwoofer?
There is no single answer, because box size follows the driver's Thiele-Small parameters rather than its cone diameter. The two 12-inch subwoofers in this tool want very different boxes: the SB34SWNRX-S75-6 sits at 39 litres sealed, the SB34SWPL76-4 at 18.5 litres. Each also works across a range rather than at one point — 24.8 to 67.5 litres and 11.8 to 32 litres respectively — and in both cases less than 2 Hz of F3 separates the smallest box from the largest. Choose the driver first, then take the volume from its card and check it against your boot.
Sealed or ported — which should I build?
A sealed box is smaller, simpler, and has no port to design or get wrong. A ported box plays lower for the same driver, but needs considerably more space and a verified port layout. On the SB34SWNRX-S75-6 the gap is large: 39 litres sealed reaches an F3 of 43.4 Hz, while 75.1 litres tuned to 19 Hz reaches 26.4 Hz. Nine of the ten woofers here are suitable for a ported box; the SW26DBAC76-4 is sealed only. This tool gives outside dimensions for a ported box but does not calculate port size or position.
How much power does a car subwoofer need?
Match the amplifier to the driver's rating rather than to a headline number. The ten subwoofers here are rated from 80 W to 300 W RMS, and the calculator starts each one at 100 W or its rating, whichever is lower. Past a certain point extra watts stop buying extra output: the simulation limits cone movement to the driver's rated excursion, and the chart marks where that limit is reached.
Why does the suggested box look too big for a car?
The figure shown first is the balanced alignment, which is the middle of three. Every woofer card also offers a smaller and a larger box, with the F3 of each, so you can see what a smaller box actually costs. On the SW26DBAC76-4, halving the box from 40 to 20.2 litres moves F3 by 1.4 Hz. Use “Will it fit my boot?” to enter the clear space you have and get outside dimensions that fit it.
These answers describe this tool's own simulated output for the SB Acoustics drivers listed. They are design starting points, not measurements, and not approved construction plans.
All 10 woofers · specifications & box sizes
Published SB Acoustics specifications and calculated starting box sizes. These tables work without JavaScript. Box recommendations are simulations, not approved construction plans. Volumes are usable air space after subtracting internal parts.
SB23MFCL45-4 — specifications & box size
Suggested starting point: 0.77 ft³ / 21.9 L ported, tuned to 27 Hz. Check the chosen alignment against the car, available space and required output.
| Model | SB23MFCL45-4 |
|---|---|
| Nominal impedance | 4 Ω |
| Rated power · IEC 268-5 | 150 W |
| Sensitivity · 2.83 V / 1 m | 87.5 dB |
| Linear coil travel (p-p) | 24 mm |
| Fs | 27 Hz |
| Vas | 37 L |
| Sd | 210 cm² |
| Re | 3.3 Ω |
| Qms | 7.7 |
| Qes | 0.36 |
| Published Qts | 0.34 |
| Le | 0.73 mH |
| Voice-coil diameter | 45.5 mm |
| Voice-coil height | 32 mm |
| Air-gap height | 8 mm |
| Mms | 59 g |
| BL | 9.6 Tm |
| Cms | 0.59 mm/N |
| Rms | 1.3 kg/s |
| Flux density | 1.03 T |
| Magnet weight | 2 kg |
| Net weight | 4.7 kg |
Calculated sealed / ported box options
| Type | Option | Net volume | Tuning | Qtc | F3 | F6 |
|---|---|---|---|---|---|---|
| Sealed | Small box | 0.24 ft³ / 6.7 L | — | 0.851 | 59.3 Hz | 48 Hz |
| Sealed | Balanced | 0.38 ft³ / 10.7 L | — | 0.707 | 57.1 Hz | 43.4 Hz |
| Sealed | Deeper bass | 0.67 ft³ / 19.1 L | — | 0.577 | 59 Hz | 40.7 Hz |
| Ported | Small box | 0.54 ft³ / 15.3 L | 31.1 Hz | — | 35.3 Hz | 29.9 Hz |
| Ported | Balanced | 0.77 ft³ / 21.9 L | 27 Hz | — | 30.2 Hz | 25.1 Hz |
| Ported | Deeper bass | 1.08 ft³ / 30.6 L | 23 Hz | — | 29.3 Hz | 21.1 Hz |
F3 / F6 are enclosure-only estimates before cabin gain, the 20 Hz filter or travel limiting. Qtc applies to sealed boxes. Suggested means a starting point, not universally best.
- Long-stroke design; optimised for smaller enclosures
- Mineral-filled polypropylene cone
- 45.5 mm copper voice coil and fibreglass former
- Vented cast aluminium chassis and motor
- Low-damping rubber surround; silver lead wires
Data transcribed from 8-inch-SB23MFCL45-4.pdf. SB Acoustics manufacturer page · Dimension drawing
SW26SFC38-4 — specifications & box size
Suggested starting point: 0.96 ft³ / 27.3 L ported, tuned to 27 Hz. Check the chosen alignment against the car, available space and required output.
| Model | SW26SFC38-4 |
|---|---|
| Nominal impedance | 4 Ω |
| Rated power · IEC 268-5 | 80 W |
| Sensitivity · 2.83 V / 1 m | 91.5 dB |
| Linear coil travel (p-p) | 7 mm |
| Fs | 27 Hz |
| Vas | 88 L |
| Sd | 340 cm² |
| Re | 3.5 Ω |
| Qms | 4.94 |
| Qes | 0.3 |
| Published Qts | 0.29 |
| Le | 1.27 mH |
| Voice-coil diameter | 38.5 mm |
| Voice-coil height | 16 mm |
| Air-gap height | 9 mm |
| Mms | 64 g |
| BL | 11.2 Tm |
| Cms | 0.54 mm/N |
| Rms | 2.2 kg/s |
| Flux density | 0.72 T |
| Magnet weight | 0.1 kg |
| Net weight | 0.94 kg |
Calculated sealed / ported box options
| Type | Option | Net volume | Tuning | Qtc | F3 | F6 |
|---|---|---|---|---|---|---|
| Sealed | Small box | 0.36 ft³ / 10.2 L | — | 0.85 | 72.1 Hz | 58.3 Hz |
| Sealed | Balanced | 0.55 ft³ / 15.7 L | — | 0.708 | 69.4 Hz | 52.8 Hz |
| Sealed | Deeper bass | 0.93 ft³ / 26.3 L | — | 0.577 | 71.8 Hz | 49.4 Hz |
| Ported | Small box | 0.67 ft³ / 19.1 L | 31.1 Hz | — | 51.9 Hz | 41.2 Hz |
| Ported | Balanced | 0.96 ft³ / 27.3 L | 27 Hz | — | 50.4 Hz | 36 Hz |
| Ported | Deeper bass | 1.35 ft³ / 38.2 L | 23 Hz | — | 56.7 Hz | 33.5 Hz |
F3 / F6 are enclosure-only estimates before cabin gain, the 20 Hz filter or travel limiting. Qtc applies to sealed boxes. Suggested means a starting point, not universally best.
- Lightweight shallow construction
- Hard pressed vented paper cone
- Inverted low-damping rubber surround
- Symmetric suspension
- Stacked neodymium motor with built-in soft limiting
- Non-conducting fibreglass former; long-life lead wires
Data transcribed from 10in-SW26SFC38-4.pdf. SB Acoustics manufacturer page · Dimension drawing
SW26DBAC76-4 — specifications & box size
Suggested starting point: 1.41 ft³ / 40 L sealed. Ported is not suitable; this model is recommended for sealed use.
| Model | SW26DBAC76-4 |
|---|---|
| Nominal impedance | 4 Ω |
| Rated power · IEC 268-5 | 200 W |
| Sensitivity · 2.83 V / 1 m | 86 dB |
| Linear coil travel (p-p) | 24 mm |
| Fs | 22 Hz |
| Vas | 54 L |
| Sd | 312 cm² |
| Re | 3.2 Ω |
| Qms | 4.5 |
| Qes | 0.51 |
| Published Qts | 0.46 |
| Le | Not stated |
| Voice-coil diameter | 75.5 mm |
| Voice-coil height | 30 mm |
| Air-gap height | 6 mm |
| Mms | 134 g |
| BL | 10.8 Tm |
| Cms | 0.39 mm/N |
| Rms | 4.1 kg/s |
| Flux density | 1 T |
| Magnet weight | 0.281 kg |
| Net weight | 3.43 kg |
Calculated sealed / ported box options
| Type | Option | Net volume | Tuning | Qtc | F3 | F6 |
|---|---|---|---|---|---|---|
| Sealed | Small box | 0.71 ft³ / 20.2 L | — | 0.85 | 36.3 Hz | 29.4 Hz |
| Sealed | Balanced | 1.41 ft³ / 40 L | — | 0.684 | 34.9 Hz | 26.2 Hz |
| Sealed | Deeper bass | 2.9 ft³ / 82.2 L | — | 0.577 | 36.1 Hz | 24.9 Hz |
F3 / F6 are enclosure-only estimates before cabin gain, the 20 Hz filter or travel limiting. Qtc applies to sealed boxes. Suggested means a starting point, not universally best.
- Patented long-throw shallow design
- Dual rigid aluminium cone structure
- Neodymium motor with shorting ring
- 75.5 mm copper voice coil and fibreglass former
- Vented cast aluminium chassis; silver lead wires
Data transcribed from 10in-SW26DBAC76-4.pdf. SB Acoustics manufacturer page · Dimension drawing
SB29SWNRX-S75-6 — specifications & box size
Suggested starting point: 0.78 ft³ / 22.2 L ported, tuned to 20 Hz. Check the chosen alignment against the car, available space and required output.
| Model | SB29SWNRX-S75-6 |
|---|---|
| Nominal impedance | 6 Ω |
| Rated power · IEC 268-5 | 200 W |
| Sensitivity · 2.83 V / 1 m | 86 dB |
| Linear coil travel (p-p) | 22.5 mm |
| Fs | 20 Hz |
| Vas | 66 L |
| Sd | 312 cm² |
| Re | 4.5 Ω |
| Qms | 4.5 |
| Qes | 0.31 |
| Published Qts | 0.29 |
| Le | 3 mH |
| Voice-coil diameter | 75.6 mm |
| Voice-coil height | 28.5 mm |
| Air-gap height | 6 mm |
| Mms | 132 g |
| BL | 15.4 Tm |
| Cms | 0.48 mm/N |
| Rms | 3.7 kg/s |
| Flux density | 0.63 T |
| Magnet weight | 2.1 kg |
| Net weight | 5.38 kg |
Calculated sealed / ported box options
| Type | Option | Net volume | Tuning | Qtc | F3 | F6 |
|---|---|---|---|---|---|---|
| Sealed | Small box | 0.29 ft³ / 8.1 L | — | 0.85 | 52 Hz | 42.1 Hz |
| Sealed | Balanced | 0.44 ft³ / 12.5 L | — | 0.708 | 50.1 Hz | 38.1 Hz |
| Sealed | Deeper bass | 0.75 ft³ / 21.1 L | — | 0.577 | 51.9 Hz | 35.7 Hz |
| Ported | Small box | 0.55 ft³ / 15.5 L | 23 Hz | — | 36.8 Hz | 29.3 Hz |
| Ported | Balanced | 0.78 ft³ / 22.2 L | 20 Hz | — | 35.4 Hz | 25.3 Hz |
| Ported | Deeper bass | 1.1 ft³ / 31.1 L | 17 Hz | — | 40.2 Hz | 23.3 Hz |
F3 / F6 are enclosure-only estimates before cabin gain, the 20 Hz filter or travel limiting. Qtc applies to sealed boxes. Suggested means a starting point, not universally best.
- Hard paper cone made in-house
- 75.6 mm four-layer copper voice coil
- Vented pole piece and cast aluminium chassis
- Low-damping rubber surround
- Fibreglass former; long-life silver lead wires
Data transcribed from 10in-SB29SWNRX-S75-6.pdf. SB Acoustics manufacturer page · Dimension drawing
SB34SWNRX-S75-6 — specifications & box size
Suggested starting point: 2.65 ft³ / 75.1 L ported, tuned to 19 Hz. Check the chosen alignment against the car, available space and required output.
| Model | SB34SWNRX-S75-6 |
|---|---|
| Nominal impedance | 6 Ω |
| Rated power · IEC 268-5 | 200 W |
| Sensitivity · 2.83 V / 1 m | 88 dB |
| Linear coil travel (p-p) | 22.5 mm |
| Fs | 19 Hz |
| Vas | 164 L |
| Sd | 508 cm² |
| Re | 4.5 Ω |
| Qms | 5 |
| Qes | 0.34 |
| Published Qts | 0.32 |
| Le | 3 mH |
| Voice-coil diameter | 75.6 mm |
| Voice-coil height | 28.5 mm |
| Air-gap height | 6 mm |
| Mms | 154 g |
| BL | 15.4 Tm |
| Cms | 0.46 mm/N |
| Rms | 3.7 kg/s |
| Flux density | 0.63 T |
| Magnet weight | 2.1 kg |
| Net weight | 5.85 kg |
Calculated sealed / ported box options
| Type | Option | Net volume | Tuning | Qtc | F3 | F6 |
|---|---|---|---|---|---|---|
| Sealed | Small box | 0.88 ft³ / 24.8 L | — | 0.851 | 45.1 Hz | 36.5 Hz |
| Sealed | Balanced | 1.38 ft³ / 39 L | — | 0.707 | 43.4 Hz | 33 Hz |
| Sealed | Deeper bass | 2.38 ft³ / 67.5 L | — | 0.577 | 44.9 Hz | 30.9 Hz |
| Ported | Small box | 1.85 ft³ / 52.5 L | 21.8 Hz | — | 29 Hz | 23.7 Hz |
| Ported | Balanced | 2.65 ft³ / 75.1 L | 19 Hz | — | 26.4 Hz | 19.9 Hz |
| Ported | Deeper bass | 3.71 ft³ / 105.1 L | 16.2 Hz | — | 30.6 Hz | 17 Hz |
F3 / F6 are enclosure-only estimates before cabin gain, the 20 Hz filter or travel limiting. Qtc applies to sealed boxes. Suggested means a starting point, not universally best.
- Hard paper cone made in-house
- 75.6 mm four-layer copper voice coil
- Vented pole piece and cast aluminium chassis
- Low-damping rubber surround
- Fibreglass former; long-life silver lead wires
Data transcribed from 12in-SB34SWNRX-S75-6.pdf. SB Acoustics manufacturer page · Dimension drawing
SB34SWPL76-4 — specifications & box size
Suggested starting point: 1.25 ft³ / 35.4 L ported, tuned to 19 Hz. Check the chosen alignment against the car, available space and required output.
| Model | SB34SWPL76-4 |
|---|---|
| Nominal impedance | 4 Ω |
| Rated power · IEC 268-5 | 300 W |
| Sensitivity · 2.83 V / 1 m | 85 dB |
| Linear coil travel (p-p) | 30 mm |
| Fs | 19 Hz |
| Vas | 79 L |
| Sd | 458 cm² |
| Re | 3.5 Ω |
| Qms | 7.7 |
| Qes | 0.33 |
| Published Qts | 0.32 |
| Le | 5.3 mH |
| Voice-coil diameter | 76 mm |
| Voice-coil height | 38 mm |
| Air-gap height | 8 mm |
| Mms | 264 g |
| BL | 18.3 Tm |
| Cms | 0.27 mm/N |
| Rms | 4.1 kg/s |
| Flux density | 0.62 T |
| Magnet weight | 2.4 kg |
| Net weight | 7.68 kg |
Calculated sealed / ported box options
| Type | Option | Net volume | Tuning | Qtc | F3 | F6 |
|---|---|---|---|---|---|---|
| Sealed | Small box | 0.42 ft³ / 11.8 L | — | 0.85 | 45.3 Hz | 36.7 Hz |
| Sealed | Balanced | 0.65 ft³ / 18.5 L | — | 0.707 | 43.7 Hz | 33.2 Hz |
| Sealed | Deeper bass | 1.13 ft³ / 32 L | — | 0.577 | 45.2 Hz | 31.1 Hz |
| Ported | Small box | 0.88 ft³ / 24.8 L | 21.8 Hz | — | 29.4 Hz | 23.9 Hz |
| Ported | Balanced | 1.25 ft³ / 35.4 L | 19 Hz | — | 26.9 Hz | 20.2 Hz |
| Ported | Deeper bass | 1.75 ft³ / 49.6 L | 16.2 Hz | — | 31.2 Hz | 17.3 Hz |
F3 / F6 are enclosure-only estimates before cabin gain, the 20 Hz filter or travel limiting. Qtc applies to sealed boxes. Suggested means a starting point, not universally best.
- Long-stroke design with high-stability suspension
- Stiff hard paper cone made in-house
- 76 mm copper voice coil
- Vented cast aluminium chassis, motor and coil former
- Low-damping rubber surround; silver lead wires
Data transcribed from 12in-SB34SWPL76-4.pdf. SB Acoustics manufacturer page · Dimension drawing
SB42FHCL75-6 — specifications & box size
Suggested starting point: 6.61 ft³ / 187.1 L ported, tuned to 18.4 Hz. Check the chosen alignment against the car, available space and required output.
| Model | SB42FHCL75-6 |
|---|---|
| Nominal impedance | 6 Ω |
| Rated power · IEC 268-5 | 300 W |
| Sensitivity · 2.83 V / 1 m | 93 dB |
| Linear coil travel (p-p) | 23 mm |
| Fs | 18.4 Hz |
| Vas | 462 L |
| Sd | 850 cm² |
| Re | 4.6 Ω |
| Qms | 7.4 |
| Qes | 0.32 |
| Published Qts | 0.31 |
| Le | 2.1 mH |
| Voice-coil diameter | 75.6 mm |
| Voice-coil height | 31 mm |
| Air-gap height | 8 mm |
| Mms | 166 g |
| BL | 16.7 Tm |
| Cms | 0.45 mm/N |
| Rms | 2.6 kg/s |
| Flux density | 1.1 T |
| Magnet weight | 3.6 kg |
| Net weight | 10.2 kg |
Calculated sealed / ported box options
| Type | Option | Net volume | Tuning | Qtc | F3 | F6 |
|---|---|---|---|---|---|---|
| Sealed | Small box | 2.27 ft³ / 64.3 L | — | 0.85 | 45.3 Hz | 36.7 Hz |
| Sealed | Balanced | 3.55 ft³ / 100.4 L | — | 0.707 | 43.6 Hz | 33.1 Hz |
| Sealed | Deeper bass | 6.05 ft³ / 171.4 L | — | 0.577 | 45.1 Hz | 31.1 Hz |
| Ported | Small box | 4.62 ft³ / 130.9 L | 21.2 Hz | — | 30.2 Hz | 24.4 Hz |
| Ported | Balanced | 6.61 ft³ / 187.1 L | 18.4 Hz | — | 28.4 Hz | 20.7 Hz |
| Ported | Deeper bass | 9.25 ft³ / 261.9 L | 15.6 Hz | — | 33 Hz | 18.3 Hz |
F3 / F6 are enclosure-only estimates before cabin gain, the 20 Hz filter or travel limiting. Qtc applies to sealed boxes. Suggested means a starting point, not universally best.
- Paper honeycomb cone with fibreglass skins
- Large motor; vented pole piece
- 75.6 mm copper voice coil and fibreglass former
- Vented cast aluminium chassis
- Low-damping rubber surround; silver lead wires
Data transcribed from 15in-SB42FHCL75-6.pdf. SB Acoustics manufacturer page · Dimension drawing
WO24P-4 — specifications & box size
Suggested starting point: 2.34 ft³ / 66.4 L ported, tuned to 28 Hz. Check the chosen alignment against the car, available space and required output.
| Model | WO24P-4 |
|---|---|
| Nominal impedance | 4 Ω |
| Rated power · IEC 268-5 | 90 W |
| Sensitivity · 2.83 V / 1 m | 91 dB |
| Linear coil travel (p-p) | 17 mm |
| Fs | 28 Hz |
| Vas | 71 L |
| Sd | 255 cm² |
| Re | 3.3 Ω |
| Qms | 6.7 |
| Qes | 0.42 |
| Published Qts | 0.4 |
| Le | 0.29 mH |
| Voice-coil diameter | 49.5 mm |
| Voice-coil height | 23 mm |
| Air-gap height | 6 mm |
| Mms | 42 g |
| BL | 7.6 Tm |
| Cms | 0.77 mm/N |
| Rms | 1.1 kg/s |
| Flux density | 1.1 T |
| Magnet weight | 1.36 kg |
| Net weight | 3.7 kg |
Calculated sealed / ported box options
| Type | Option | Net volume | Tuning | Qtc | F3 | F6 |
|---|---|---|---|---|---|---|
| Sealed | Small box | 0.64 ft³ / 18.1 L | — | 0.849 | 53.5 Hz | 43.3 Hz |
| Sealed | Balanced | 1.06 ft³ / 29.9 L | — | 0.707 | 51.5 Hz | 39.1 Hz |
| Sealed | Deeper bass | 2.04 ft³ / 57.9 L | — | 0.577 | 53.3 Hz | 36.7 Hz |
| Ported | Small box | 1.64 ft³ / 46.4 L | 32.2 Hz | — | 29.9 Hz | 26.8 Hz |
| Ported | Balanced | 2.34 ft³ / 66.4 L | 28 Hz | — | 25.3 Hz | 23 Hz |
| Ported | Deeper bass | 3.28 ft³ / 92.9 L | 23.8 Hz | — | 21.3 Hz | 19.6 Hz |
F3 / F6 are enclosure-only estimates before cabin gain, the 20 Hz filter or travel limiting. Qtc applies to sealed boxes. Suggested means a starting point, not universally best.
- Hard paper cone made in-house
- Undercut pole piece and dual shorting rings
- Aerodynamic cast aluminium chassis
- Linear symmetric suspension; low-damping surround
- Fibreglass former; silver lead wires attached 180° apart
- Vented pole; gasket and bolt-hole protrusions reduce coupling
Data transcribed from 9.5in-SATORI-WO24P-4.pdf. SB Acoustics manufacturer page · Dimension drawing
WO24TX-4 — specifications & box size
Suggested starting point: 1.7 ft³ / 48.2 L ported, tuned to 26.3 Hz. Check the chosen alignment against the car, available space and required output.
| Model | WO24TX-4 |
|---|---|
| Nominal impedance | 4 Ω |
| Rated power · IEC 268-5 | 90 W |
| Sensitivity · 2.83 V / 1 m | 91 dB |
| Linear coil travel (p-p) | 17.5 mm |
| Fs | 26.3 Hz |
| Vas | 79 L |
| Sd | 255 cm² |
| Re | 3.3 Ω |
| Qms | 5.66 |
| Qes | 0.37 |
| Published Qts | 0.35 |
| Le | 0.29 mH |
| Voice-coil diameter | 49.5 mm |
| Voice-coil height | 23.5 mm |
| Air-gap height | 6 mm |
| Mms | 42.8 g |
| BL | 7.9 Tm |
| Cms | 0.86 mm/N |
| Rms | 1.25 kg/s |
| Flux density | 1.07 T |
| Magnet weight | 1.36 kg |
| Net weight | 3.9 kg |
Calculated sealed / ported box options
| Type | Option | Net volume | Tuning | Qtc | F3 | F6 |
|---|---|---|---|---|---|---|
| Sealed | Small box | 0.52 ft³ / 14.7 L | — | 0.849 | 57.1 Hz | 46.3 Hz |
| Sealed | Balanced | 0.83 ft³ / 23.4 L | — | 0.707 | 55.1 Hz | 41.9 Hz |
| Sealed | Deeper bass | 1.48 ft³ / 42 L | — | 0.577 | 56.9 Hz | 39.2 Hz |
| Ported | Small box | 1.19 ft³ / 33.7 L | 30.2 Hz | — | 33.8 Hz | 28.8 Hz |
| Ported | Balanced | 1.7 ft³ / 48.2 L | 26.3 Hz | — | 28.7 Hz | 24.2 Hz |
| Ported | Deeper bass | 2.38 ft³ / 67.5 L | 22.4 Hz | — | 26.3 Hz | 20.3 Hz |
F3 / F6 are enclosure-only estimates before cabin gain, the 20 Hz filter or travel limiting. Qtc applies to sealed boxes. Suggested means a starting point, not universally best.
- Advanced TeXtreme® cone
- Undercut pole piece and dual shorting rings
- Aerodynamic cast aluminium chassis
- Linear symmetric suspension; low-damping surround
- Fibreglass former; silver lead wires attached 180° apart
- Vented pole; gasket and bolt-hole protrusions reduce coupling
Data transcribed from 9.5in-SATORI-WO24TX-4.pdf. SB Acoustics manufacturer page · Dimension drawing
WO34HC-4 — specifications & box size
Suggested starting point: 1.47 ft³ / 41.5 L ported, tuned to 20 Hz. Check the chosen alignment against the car, available space and required output.
| Model | WO34HC-4 |
|---|---|
| Nominal impedance | 4 Ω |
| Rated power · IEC 268-5 | 200 W |
| Sensitivity · 2.83 V / 1 m | 92.5 dB |
| Linear coil travel (p-p) | 16.6 mm |
| Fs | 20 Hz |
| Vas | 233 L |
| Sd | 585 cm² |
| Re | 3.5 Ω |
| Qms | 5.53 |
| Qes | 0.25 |
| Published Qts | 0.23 |
| Le | 0.7 mH |
| Voice-coil diameter | 75.6 mm |
| Voice-coil height | 24.6 mm |
| Air-gap height | 8 mm |
| Mms | 132 g |
| BL | 15.1 Tm |
| Cms | 0.48 mm/N |
| Rms | 3 kg/s |
| Flux density | 1.17 T |
| Magnet weight | 3.52 kg |
| Net weight | 9.64 kg |
Calculated sealed / ported box options
| Type | Option | Net volume | Tuning | Qtc | F3 | F6 |
|---|---|---|---|---|---|---|
| Sealed | Small box | 0.66 ft³ / 18.7 L | — | 0.85 | 63.1 Hz | 51.1 Hz |
| Sealed | Balanced | 1 ft³ / 28.4 L | — | 0.707 | 60.8 Hz | 46.2 Hz |
| Sealed | Deeper bass | 1.62 ft³ / 45.9 L | — | 0.577 | 62.9 Hz | 43.3 Hz |
| Ported | Small box | 1.03 ft³ / 29.1 L | 23 Hz | — | 51.2 Hz | 40.6 Hz |
| Ported | Balanced | 1.47 ft³ / 41.5 L | 20 Hz | — | 50.2 Hz | 36.6 Hz |
| Ported | Deeper bass | 2.05 ft³ / 58.1 L | 17 Hz | — | 54.1 Hz | 34.9 Hz |
F3 / F6 are enclosure-only estimates before cabin gain, the 20 Hz filter or travel limiting. Qtc applies to sealed boxes. Suggested means a starting point, not universally best.
- Rigid honeycomb cone with black fibreglass skins
- Large vented motor; undercut pole and dual shorting rings
- Linear symmetric suspension; low-damping surround
- 75.6 mm copper coil with fibreglass former
- Vented cast aluminium chassis; silver lead wires
Data transcribed from 13.5-inch-SATORI-WO34HC-4.pdf. SB Acoustics manufacturer page · Dimension drawing