Soundstream PWS-15
15″ subwoofer · dual 4 Ω · 400 W RMS
| Source | web.archive.org · manufacturer data |
|---|---|
| Checked against source | October 2026 |
| Thiele/Small parameters | not in the spec sheet: Re, Sd — typical value for the size used |
| Mounting dimensions | 3 of 4 — missing: magnet diameter; the designer will use an estimate |
Recommended box
For a sedan, one sub, 400 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 · 1.11 |
|---|---|
| Fc | 45 Hz |
| F3 (−3 dB, no cabin gain) | 36 Hz |
| Example box (outside) | 31 1/2″ × 17 11/16″ × 12″ |
Ported
deeper, louder| Tuning (Fb) | 32 Hz |
|---|---|
| Port | slot 1 9/16 × 16 5/16″, 16″ long |
| Port velocity at 400 W | 53 ft/s |
| F3 (−3 dB, no cabin gain) | 31 Hz |
| Example box (outside) | 31 1/2″ × 17 11/16″ × 14 7/8″ |
Deeper: 4.80 ft³ (136 L) tuned to 34 Hz, 31 1/2″ × 17 11/16″ × 19 7/8″ 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 | 400 W |
| Fs | 28.7 Hz |
| Qts | 0.71 |
| Qes | 0.849 |
| Qms | 4.33 |
| Vas | 4.14 ft³ |
|---|---|
| Re (one coil) | ≈ 3.4 Ω |
| Sd | ≈ 124 in² |
| Xmax | 0.41″ |
| EBP | 34 — suits sealed calc. |
| Sensitivity, 1 W / 1 m | 87.2 dB calc. |
Mounting dimensions
| Cutout diameter | 13 13/16″ |
|---|---|
| Mounting depth | 6 15/16″ |
| Overall diameter | 15 5/8″ |
“≈” 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 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
- Soundstream SPLX-154 (2006) 15″ · 4 Ω
Similar 15″ subwoofers from other brands
Close in Fs, Qts and Vas — a box of similar volume will suit them.
- Dayton Audio UM15-22 2.86 ft³ sealed · 2.90 ft³ ported
- CT Sounds BIO-15 D4 2.90 ft³ sealed · 2.51 ft³ ported
- Bomber Bicho Papão 800W 4+4 Ohm (SW15BPF800-4+4) 2.75 ft³ sealed · 3.21 ft³ ported
- Quantum Audio Q3000/15D 2.75 ft³ sealed · 2.86 ft³ ported
- CT Sounds BIO-15 D2 2.90 ft³ sealed · 2.51 ft³ ported
- Kicker CompC 15" 4-Ohm DVC (50CWCD154) 2.93 ft³ sealed · 3.50 ft³ ported
FAQ
What box does the Soundstream PWS-15 need?
Recommended net volume: 2.83 ft³ sealed, 3.32 ft³ ported tuned to 32 Hz — for one sub in a sedan at 400 W. Fit the box to your space and amp in the free calculator, with plans and a cut sheet.
What are the Soundstream PWS-15 Thiele/Small specs?
Fs 28.7 Hz, Qts 0.71, Vas 4.14 ft³, Xmax 0.41″.
What is the Soundstream PWS-15 mounting depth?
Mounting depth is 6 15/16″, cutout diameter 13 13/16″. The inside depth of the box must exceed the mounting depth by at least 1″.
How much power does the Soundstream PWS-15 handle and how do I wire it?
RMS power rating: 400 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.