Soundstream PSW.124
12″ subwoofer · 4 Ω · 300 W RMS
| Source | web.archive.org · manufacturer data |
|---|---|
| Checked against source | October 2026 |
| Thiele/Small parameters | complete |
| Mounting dimensions | 0 of 4 — missing: cutout, mounting depth, frame outer diameter, magnet diameter; the designer will use an estimate |
Recommended box
For a sedan, one sub, 300 W. It’s the same math as the designer’s step-by-step mode, where you can fit the box to your space, vehicle and amp and get plans, a cut sheet and DXF.
Sealed
smaller, tighter| Bass character (Qtc) | Boomy, with a bump · 1.14 |
|---|---|
| Fc | 44 Hz |
| F3 (−3 dB, no cabin gain) | 34 Hz |
| Example box (outside) | 31 1/2″ × 15 3/4″ × 9 3/16″ |
Ported
deeper, louder| Tuning (Fb) | 34 Hz |
|---|---|
| Port | slot 1 9/16 × 14 5/16″, 37 1/8″ long |
| Port velocity at 300 W | 32 ft/s |
| F3 (−3 dB, no cabin gain) | 34 Hz |
| Example box (outside) | 31 1/2″ × 15 3/4″ × 9 5/8″ |
Deeper: 3.11 ft³ (88 L) tuned to 33 Hz, 31 1/2″ × 15 3/4″ × 15 1/2″ outside — a bigger box with flatter deep bass. Open in the calculator
Projects with this subwoofer
Boxes that users designed and published: plans, cut sheet and response graph.
Thiele/Small parameters
| Size | 12″ |
|---|---|
| Voice coils | 4 Ω |
| RMS power | 300 W |
| Fs | 32.6 Hz |
| Qts | 0.84 |
| Qes | 0.954 |
| Qms | 6.73 |
| Vas | 1.58 ft³ |
| Re | 3.2 Ω |
|---|---|
| Sd | 79.9 in² |
| Xmax | 0.39″ |
| Vd | 31.5 in³ calc. |
| Mms | 201 g calc. |
| BL | 11.7 T·m calc. |
| EBP | 34 — suits sealed calc. |
| Sensitivity, 1 W / 1 m | 84.1 dB calc. |
Mounting dimensions
| Cutout diameter | ≈ 11 1/8″ |
|---|---|
| Mounting depth | ≈ 5 7/8″ |
Cone area (Sd) calculated from Fs, Vas and Mms: 79.9 in².
“≈” means the value isn’t in the spec sheet and a typical value for the size is used; “calc.” means it’s calculated from the published parameters. Check the manufacturer’s spec sheet before you build.
Data sources
Other Soundstream 12″ models
- Soundstream EXACT 12 12″ · 4 Ω
- Soundstream PCW-12 12″ · dual 4 Ω
- Soundstream PWS-12 12″ · dual 4 Ω
- Soundstream PXW-12 12″ · dual 4 Ω
- Soundstream PXW-12/2 12″ · dual 2 Ω
- Soundstream R1-12 12″ · dual 4 Ω
- Soundstream R1-12L 12″ · dual 4 Ω
- Soundstream R3.12 12″ · dual 2 Ω
- Soundstream RBW-12 12″ · dual 4 Ω
- Soundstream RFW-12 12″ · dual 4 Ω
- Soundstream RW-12 12″ · dual 4 Ω
- Soundstream SPL MULE 12″ · 4 Ω
Similar 12″ subwoofers from other brands
Close in Fs, Qts and Vas — a box of similar volume will suit them.
- Earthquake TNT-12S 1.73 ft³ sealed · 1.31 ft³ ported
- DD Audio 2512f D2 1.73 ft³ sealed · 1.24 ft³ ported
- MTX Audio FPR12-04 1.91 ft³ sealed · 1.34 ft³ ported
- Black Hydra Delta-12S 1.73 ft³ sealed · 1.20 ft³ ported
- URAL Molot 12 (2+2) 1.80 ft³ sealed · 1.27 ft³ ported
- Kicker CompVT 12" 4-Ohm SVC (52CVT124) 1.87 ft³ sealed · 2.01 ft³ ported
FAQ
What box does the Soundstream PSW.124 need?
Recommended net volume: 1.84 ft³ sealed, 1.27 ft³ ported tuned to 34 Hz — for one sub in a sedan at 300 W. Fit the box to your space and amp in the free calculator, with plans and a cut sheet.
What are the Soundstream PSW.124 Thiele/Small specs?
Fs 32.6 Hz, Qts 0.84, Vas 1.58 ft³, Xmax 0.39″, Sd 79.9 in².
How much power does the Soundstream PSW.124 handle and how do I wire it?
RMS power rating: 300 W. Wiring for several subs and amp power — in the wiring calculator.