Soundstream R1-12L
12″ subwoofer · dual 4 Ω · 800 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 |
- The spec sheet's Qts 0.418 doesn't match its Qes and Qms (they give 0.47).
Recommended box
For a sedan, one sub, 800 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 | 37 Hz |
| F3 (−3 dB, no cabin gain) | 35 Hz |
| Example box (outside) | 14 3/16″ × 14 3/16″ × 17 15/16″ |
Ported
deeper, louder| Tuning (Fb) | 30 Hz |
|---|---|
| Port | slot 2 3/8 × 14 5/16″, 39″ long |
| Port velocity at 800 W | 61 ft/s |
| F3 (−3 dB, no cabin gain) | 27 Hz |
| Example box (outside) | 31 1/2″ × 15 3/4″ × 14 7/8″ |
Deeper: 3.07 ft³ (87 L) tuned to 25 Hz, 31 1/2″ × 15 3/4″ × 18 15/16″ 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 | 800 W |
| Fs | 21.5 Hz |
| Qts | 0.47 |
| Qes | 0.49 |
| Qms | 9.21 |
| Vas | 2.86 ft³ |
| Re (one coil) | 3.4 Ω |
|---|---|
| Sd | 79.2 in² |
| Xmax | 0.50″ |
| Vd | 39.6 in³ calc. |
| Mms | 250 g calc. |
| BL | 15.3 T·m calc. |
| EBP | 44 — suits sealed calc. |
| Sensitivity, 1 W / 1 m | 84.2 dB calc. |
Mounting dimensions
| Cutout diameter | 11 1/8″ |
|---|---|
| Mounting depth | 7 1/2″ |
“≈” 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 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
- Soundstream SPL MULE 12″ · 4 Ω
Similar 12″ subwoofers from other brands
Close in Fs, Qts and Vas — a box of similar volume will suit them.
- Mac Audio Maximus Reference 12 (DVC) 1.31 ft³ sealed · 2.26 ft³ ported
- Hertz Mille Pro MP 300 D2.3 (DVC 2+2 ohm) 1.84 ft³ sealed · 1.45 ft³ ported
- Infinity Kappa 122.7W 1.70 ft³ sealed · 2.44 ft³ ported
- Audiobahn ALUM12N 1.41 ft³ sealed · 2.15 ft³ ported
- Audiobahn ALUM12Q 1.41 ft³ sealed · 2.15 ft³ ported
- Dayton Audio RSS315HFA-8 1.52 ft³ sealed · 2.51 ft³ ported
FAQ
What box does the Soundstream R1-12L need?
Recommended net volume: 1.45 ft³ sealed, 2.30 ft³ ported tuned to 30 Hz — for one sub in a sedan at 800 W. Fit the box to your space and amp in the free calculator, with plans and a cut sheet.
What are the Soundstream R1-12L Thiele/Small specs?
Fs 21.5 Hz, Qts 0.47, Vas 2.86 ft³, Xmax 0.50″, Sd 79.2 in².
What is the Soundstream R1-12L mounting depth?
Mounting depth is 7 1/2″, 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 R1-12L handle and how do I wire it?
RMS power rating: 800 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.