Soundstream RBW-15
15″ subwoofer · dual 4 Ω · 650 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, 650 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 · 1.40 |
|---|---|
| Fc | 44 Hz |
| F3 (−3 dB, no cabin gain) | 32 Hz |
| Example box (outside) | 31 1/2″ × 18 1/8″ × 12 1/8″ |
Ported
deeper, louder| Tuning (Fb) | 30 Hz |
|---|---|
| Port | slot 1 9/16 × 16 11/16″, 16 1/4″ long |
| Port velocity at 650 W | 64 ft/s |
| F3 (−3 dB, no cabin gain) | 30 Hz |
| Example box (outside) | 31 1/2″ × 18 1/8″ × 16 1/4″ |
Deeper: 4.98 ft³ (141 L) tuned to 35 Hz, 31 1/2″ × 18 1/8″ × 20 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 | 15″ |
|---|---|
| Voice coils | dual 4 Ω |
| RMS power | 650 W |
| Fs | 24.7 Hz |
| Qts | 0.79 |
| Qes | 0.873 |
| Qms | 8.38 |
| Vas | 6.30 ft³ |
| Re (one coil) | 3.6 Ω |
|---|---|
| Sd | 129 in² |
| Xmax | 0.46″ |
| Vd | 59.9 in³ calc. |
| Mms | 228 g calc. |
| BL | 12.1 T·m calc. |
| EBP | 28 — suits sealed calc. |
| Sensitivity, 1 W / 1 m | 86.9 dB calc. |
Mounting dimensions
| Cutout diameter | 14″ |
|---|---|
| Mounting depth | 8 1/8″ |
| Overall diameter | 15 3/4″ |
“≈” 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 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 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.
- MTX Audio 5515-22 3.25 ft³ sealed · 2.75 ft³ ported
- MTX Audio 5515-44 3.25 ft³ sealed · 2.75 ft³ ported
- Kicx STQ-382 (2+2) 2.83 ft³ sealed · 3.67 ft³ ported
- Lanzar DCT15D 2.83 ft³ sealed · 3.67 ft³ ported
- Rockford Fosgate Punch HE2 RFP4215 2.86 ft³ sealed · 3.71 ft³ ported
- Bomber Bicho Papão 600W 4+4 Ohm (SW15BP-600-4+4) 3.04 ft³ sealed · 3.96 ft³ ported
FAQ
What box does the Soundstream RBW-15 need?
Recommended net volume: 2.93 ft³ sealed, 3.81 ft³ ported tuned to 30 Hz — for one sub in a sedan at 650 W. Fit the box to your space and amp in the free calculator, with plans and a cut sheet.
What are the Soundstream RBW-15 Thiele/Small specs?
Fs 24.7 Hz, Qts 0.79, Vas 6.30 ft³, Xmax 0.46″, Sd 129 in².
What is the Soundstream RBW-15 mounting depth?
Mounting depth is 8 1/8″, cutout diameter 14″. The inside depth of the box must exceed the mounting depth by at least 1″.
How much power does the Soundstream RBW-15 handle and how do I wire it?
RMS power rating: 650 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.