Soundstream USA15
15″ 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 · 0.80 |
|---|---|
| Fc | 61 Hz |
| F3 (−3 dB, no cabin gain) | 58 Hz |
| Example box (outside) | 31 1/2″ × 17 11/16″ × 12″ |
Ported
deeper, louder| Tuning (Fb) | 33 Hz |
|---|---|
| Port | slot 1 9/16 × 16 5/16″, 12 1/16″ long |
| Port velocity at 250 W | 50 ft/s |
| F3 (−3 dB, no cabin gain) | 41 Hz |
| Example box (outside) | 31 1/2″ × 17 11/16″ × 16 9/16″ |
Deeper: 5.09 ft³ (144 L) tuned to 39 Hz, 31 1/2″ × 17 11/16″ × 20 3/8″ 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 | 15″ |
|---|---|
| Voice coils | dual 4 Ω |
| RMS power | 250 W |
| Fs | 30 Hz |
| Qts | 0.40 |
| Qes | 0.41 |
| Qms | 11.5 |
| Vas | 8.72 ft³ |
| Re (one coil) | 2.28 Ω |
|---|---|
| Sd | 131 in² |
| Xmax | 0.25″ |
| Vd | 32.5 in³ calc. |
| Mms | 115 g calc. |
| BL | 11 T·m calc. |
| EBP | 73 — sealed or ported calc. |
| Sensitivity, 1 W / 1 m | 94.1 dB calc. |
Mounting dimensions
| Cutout diameter | 13 7/8″ |
|---|---|
| Mounting depth | 7″ |
“≈” 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 15″ models
- Soundstream PCW-15 15″ · dual 4 Ω
- Soundstream PWS-15 15″ · dual 4 Ω
- Soundstream PXW-15 15″ · dual 4 Ω
- Soundstream PXW-15/2 15″ · dual 2 Ω
- Soundstream R1-15 15″ · dual 4 Ω
- Soundstream R1-15L 15″ · dual 4 Ω
- Soundstream R3.15 15″ · dual 2 Ω
- Soundstream RBW-15 15″ · dual 4 Ω
- Soundstream SPLX-152 ('07-'08) 15″ · dual 2 Ω
- Soundstream SPLX-152 (2006) 15″ · dual 2 Ω
- Soundstream SPLX-152HX 15″ · dual 2 Ω
- Soundstream SPLX-154 ('07-'08) 15″ · 4 Ω
Similar 15″ subwoofers from other brands
Close in Fs, Qts and Vas — a box of similar volume will suit them.
- JBL P1500 3.21 ft³ sealed · 4.17 ft³ ported
- Fi Audio FiDay 15 1.73 ft³ sealed · 3.71 ft³ ported
- Audiopipe TS-AR15 2.83 ft³ sealed · 3.67 ft³ ported
- Orion Cobalt 15 DVC (1999) 2.93 ft³ sealed · 3.78 ft³ ported
- Elemental Designs 16Ov.2 2.40 ft³ sealed · 3.99 ft³ ported
- Kicker Comp 15" 4-Ohm SVC (43C154) 2.75 ft³ sealed · 3.67 ft³ ported
FAQ
What box does the Soundstream USA15 need?
Recommended net volume: 2.83 ft³ sealed, 3.88 ft³ ported tuned to 33 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 USA15 Thiele/Small specs?
Fs 30 Hz, Qts 0.40, Vas 8.72 ft³, Xmax 0.25″, Sd 131 in².
What is the Soundstream USA15 mounting depth?
Mounting depth is 7″, cutout diameter 13 7/8″. The inside depth of the box must exceed the mounting depth by at least 1″.
How much power does the Soundstream USA15 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.