Soundstream R1-15L
15″ subwoofer · dual 4 Ω · 900 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, 900 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 · 1.01 |
|---|---|
| Fc | 39 Hz |
| F3 (−3 dB, no cabin gain) | 32 Hz |
| Example box (outside) | 31 1/2″ × 18 1/8″ × 12″ |
Ported
deeper, louder| Tuning (Fb) | 30 Hz |
|---|---|
| Port | slot 2 3/8 × 16 11/16″, 25 13/16″ long |
| Port velocity at 900 W | 63 ft/s |
| F3 (−3 dB, no cabin gain) | 27 Hz |
| Example box (outside) | 31 1/2″ × 18 1/8″ × 17 1/2″ |
Deeper: 4.94 ft³ (140 L) tuned to 29 Hz, 31 1/2″ × 18 1/8″ × 21 5/8″ 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 | 900 W |
| Fs | 23.7 Hz |
| Qts | 0.62 |
| Qes | 0.65 |
| Qms | 13.4 |
| Vas | 4.83 ft³ |
| Re (one coil) | 3.4 Ω |
|---|---|
| Sd | 127.7 in² |
| Xmax | 0.50″ |
| Vd | 63.9 in³ calc. |
| Mms | 317 g calc. |
| BL | 15.7 T·m calc. |
| EBP | 36 — suits sealed calc. |
| Sensitivity, 1 W / 1 m | 86.5 dB calc. |
Mounting dimensions
| Cutout diameter | 14 1/4″ |
|---|---|
| Mounting depth | 8 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 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.
- Kicker Solo-Baric L7R 15" 2-Ohm DVC (45L7R152) 3.71 ft³ sealed · 4.52 ft³ ported
- Audiobahn ALUM15N 3.00 ft³ sealed · 3.67 ft³ ported
- Audiobahn ALUM15Q 3.00 ft³ sealed · 3.67 ft³ ported
- Rockford Fosgate Punch P115S4 (Stage-1, 2004) 3.04 ft³ sealed · 3.96 ft³ ported
- Crossfire BMF1528 2.83 ft³ sealed · 3.67 ft³ ported
- MTX Audio 7515-22 3.18 ft³ sealed · 3.00 ft³ ported
FAQ
What box does the Soundstream R1-15L need?
Recommended net volume: 2.90 ft³ sealed, 3.78 ft³ ported tuned to 30 Hz — for one sub in a sedan at 900 W. Fit the box to your space and amp in the free calculator, with plans and a cut sheet.
What are the Soundstream R1-15L Thiele/Small specs?
Fs 23.7 Hz, Qts 0.62, Vas 4.83 ft³, Xmax 0.50″, Sd 127.7 in².
What is the Soundstream R1-15L mounting depth?
Mounting depth is 8 3/4″, cutout diameter 14 1/4″. The inside depth of the box must exceed the mounting depth by at least 1″.
How much power does the Soundstream R1-15L handle and how do I wire it?
RMS power rating: 900 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.