Soundstream PXW-12/2
12″ subwoofer · dual 2 Ω · 450 W RMS
| Source | web.archive.org · manufacturer data |
|---|---|
| Checked against source | October 2026 |
| Thiele/Small parameters | complete |
| Mounting dimensions | 3 of 4 — missing: magnet diameter; the designer will use an estimate |
Recommended box
For a sedan, one sub, 450 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 · 1.09 |
|---|---|
| Fc | 40 Hz |
| F3 (−3 dB, no cabin gain) | 32 Hz |
| Example box (outside) | 14 3/16″ × 14 3/16″ × 20 9/16″ |
Ported
deeper, louder| Tuning (Fb) | 30 Hz |
|---|---|
| Port | slot 1 9/16 × 14 5/16″, 30″ long |
| Port velocity at 450 W | 51 ft/s |
| F3 (−3 dB, no cabin gain) | 28 Hz |
| Example box (outside) | 31 1/2″ × 15 3/4″ × 11 15/16″ |
Deeper: 2.90 ft³ (82 L) tuned to 30 Hz, 31 1/2″ × 15 3/4″ × 15 1/8″ 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 | dual 2 Ω |
| RMS power | 450 W |
| Fs | 25.7 Hz |
| Qts | 0.69 |
| Qes | 0.769 |
| Qms | 6.92 |
| Vas | 2.48 ft³ |
| Re (one coil) | 2 Ω |
|---|---|
| Sd | 75 in² |
| Xmax | 0.54″ |
| Vd | 40.8 in³ calc. |
| Mms | 182 g calc. |
| BL | 8.7 T·m calc. |
| EBP | 33 — suits sealed calc. |
| Sensitivity, 1 W / 1 m | 83.9 dB calc. |
Mounting dimensions
| Cutout diameter | 11 1/8″ |
|---|---|
| Mounting depth | 6 1/2″ |
| Overall diameter | 12 1/2″ |
“≈” 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
- web.archive.org/web/20090407090326/http://www.soundstream.com:80/manuals/2009/Pi
- web.archive.org/web/20101128195245/http://www.soundstream.com:80/manuals/2009/Pi
Other Soundstream 12″ models
- Soundstream EXACT 12 12″ · 4 Ω
- Soundstream PCW-12 12″ · dual 4 Ω
- Soundstream PSW.124 12″ · 4 Ω
- Soundstream PWS-12 12″ · dual 4 Ω
- Soundstream PXW-12 12″ · dual 4 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.
- Pioneer TS-300D4 1.80 ft³ sealed · 2.26 ft³ ported
- Pioneer TS-W120D4 1.80 ft³ sealed · 2.26 ft³ ported
- BOSS Audio PD12LED 1.73 ft³ sealed · 2.05 ft³ ported
- JBL GT5-12D 1.87 ft³ sealed · 1.94 ft³ ported
- Focal SUB 12 SLIM (shallow, SVC 4 ohm) 1.66 ft³ sealed · 1.77 ft³ ported
- Cerwin-Vega Mobile V122DV2 (Vega 12" DVC 2ohm) 1.73 ft³ sealed · 1.52 ft³ ported
FAQ
What box does the Soundstream PXW-12/2 need?
Recommended net volume: 1.70 ft³ sealed, 1.98 ft³ ported tuned to 30 Hz — for one sub in a sedan at 450 W. Fit the box to your space and amp in the free calculator, with plans and a cut sheet.
What are the Soundstream PXW-12/2 Thiele/Small specs?
Fs 25.7 Hz, Qts 0.69, Vas 2.48 ft³, Xmax 0.54″, Sd 75 in².
What is the Soundstream PXW-12/2 mounting depth?
Mounting depth is 6 1/2″, cutout diameter 11 1/8″. The inside depth of the box must exceed the mounting depth by at least 1″.
How much power does the Soundstream PXW-12/2 handle and how do I wire it?
RMS power rating: 450 W. Dual 2 Ω voice coils: series gives 4 Ω, parallel gives 1 Ω at the amp. Wiring for several subs and amp power — in the wiring calculator.