Soundstream USA12
12″ subwoofer · dual 4 Ω · 250 W RMS
| Source | web.archive.org · manufacturer data |
|---|---|
| Checked against source | October 2026 |
| Thiele/Small parameters | complete |
| Mounting dimensions | 2 of 4 — missing: frame outer diameter, magnet diameter; the designer will use an estimate |
Recommended box
For a sedan, one sub, 250 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) | Tight and punchy · 0.86 |
|---|---|
| Fc | 57 Hz |
| F3 (−3 dB, no cabin gain) | 51 Hz |
| Example box (outside) | 31 1/2″ × 15 3/4″ × 9 3/8″ |
Ported
deeper, louder| Tuning (Fb) | 34 Hz |
|---|---|
| Port | slot 1 9/16 × 14 5/16″, 17 1/2″ long |
| Port velocity at 250 W | 48 ft/s |
| F3 (−3 dB, no cabin gain) | 37 Hz |
| Example box (outside) | 31 1/2″ × 15 3/4″ × 12 13/16″ |
Deeper: 3.18 ft³ (90 L) tuned to 39 Hz, 31 1/2″ × 15 3/4″ × 15 5/16″ 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 4 Ω |
| RMS power | 250 W |
| Fs | 33 Hz |
| Qts | 0.50 |
| Qes | 0.52 |
| Qms | 12.04 |
| Vas | 3.66 ft³ |
| Re (one coil) | 2.36 Ω |
|---|---|
| Sd | 82.3 in² |
| Xmax | 0.19″ |
| Vd | 15.6 in³ calc. |
| Mms | 90 g calc. |
| BL | 9.2 T·m calc. |
| EBP | 63 — sealed or ported calc. |
| Sensitivity, 1 W / 1 m | 90.6 dB calc. |
Mounting dimensions
| Cutout diameter | 11 1/8″ |
|---|---|
| Mounting depth | 5 1/4″ |
“≈” 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 PSW.124 12″ · 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
Similar 12″ subwoofers from other brands
Close in Fs, Qts and Vas — a box of similar volume will suit them.
- Alpine SWE-1244E (Type-E) 1.87 ft³ sealed · 2.65 ft³ ported
- Lanzar MAX12D 1.70 ft³ sealed · 2.26 ft³ ported
- Kicx GT 12R (4+4) 1.48 ft³ sealed · 2.33 ft³ ported
- Orion NT 12 SVC 1.77 ft³ sealed · 2.30 ft³ ported
- Pioneer TS-W304F 1.73 ft³ sealed · 2.26 ft³ ported
- Kicker ES 12" 4-Ohm SVC (ES124) 1.84 ft³ sealed · 2.37 ft³ ported
FAQ
What box does the Soundstream USA12 need?
Recommended net volume: 1.87 ft³ sealed, 2.44 ft³ ported tuned to 34 Hz — for one sub in a sedan at 250 W. Fit the box to your space and amp in the free calculator, with plans and a cut sheet.
What are the Soundstream USA12 Thiele/Small specs?
Fs 33 Hz, Qts 0.50, Vas 3.66 ft³, Xmax 0.19″, Sd 82.3 in².
What is the Soundstream USA12 mounting depth?
Mounting depth is 5 1/4″, 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 USA12 handle and how do I wire it?
RMS power rating: 250 W. Dual 4 Ω voice coils: series gives 8 Ω, parallel gives 2 Ω at the amp. Wiring for several subs and amp power — in the wiring calculator.