Soundstream RFW-12
12″ subwoofer · dual 4 Ω · 600 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 | 0 of 4 — missing: cutout, mounting depth, frame outer diameter, magnet diameter; the designer will use an estimate |
Recommended box
For a sedan, one sub, 600 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 | 45 Hz |
| F3 (−3 dB, no cabin gain) | 43 Hz |
| Example box (outside) | 14 3/16″ × 14 3/16″ × 14 15/16″ |
Ported
deeper, louder| Tuning (Fb) | 30 Hz |
|---|---|
| Port | slot 1 9/16 × 14 5/16″, 32 9/16″ long |
| Port velocity at 600 W | 63 ft/s |
| F3 (−3 dB, no cabin gain) | 29 Hz |
| Example box (outside) | 31 1/2″ × 15 3/4″ × 11 9/16″ |
Deeper: 2.93 ft³ (83 L) tuned to 27 Hz, 31 1/2″ × 15 3/4″ × 16 3/4″ 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 | 600 W |
| Fs | 26 Hz |
| Qts | 0.46 |
| Qes | 0.54 |
| Qms | 3.3 |
| Vas | 2.30 ft³ |
|---|---|
| Re (one coil) | ≈ 3.4 Ω |
| Sd | ≈ 76 in² |
| Xmax | 0.65″ |
| EBP | 48 — suits sealed calc. |
| Sensitivity, 1 W / 1 m | 85.3 dB calc. |
Mounting dimensions
| Cutout diameter | ≈ 11 1/8″ |
|---|---|
| Mounting depth | ≈ 5 7/8″ |
“≈” 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 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 R1-12L 12″ · dual 4 Ω
- Soundstream R3.12 12″ · dual 2 Ω
- Soundstream RBW-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.
- Sundown Audio SDv3-12 D4 1.34 ft³ sealed · 1.77 ft³ ported
- Infinity Kappa 1200W (SSI 2 ohm) 1.41 ft³ sealed · 1.84 ft³ ported
- JL Audio 12W7AE-3 1.34 ft³ sealed · 1.77 ft³ ported
- Morel Ultimo SC 122 (SVC 2 ohm) 1.20 ft³ sealed · 1.94 ft³ ported
- Ground Zero GZRW 12XFL (2x2 Ohm) 1.17 ft³ sealed · 1.80 ft³ ported
- Rockford Fosgate Punch HX2 RFD2212 1.55 ft³ sealed · 2.12 ft³ ported
FAQ
What box does the Soundstream RFW-12 need?
Recommended net volume: 1.17 ft³ sealed, 1.84 ft³ ported tuned to 30 Hz — for one sub in a sedan at 600 W. Fit the box to your space and amp in the free calculator, with plans and a cut sheet.
What are the Soundstream RFW-12 Thiele/Small specs?
Fs 26 Hz, Qts 0.46, Vas 2.30 ft³, Xmax 0.65″.
How much power does the Soundstream RFW-12 handle and how do I wire it?
RMS power rating: 600 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.