Soundstream EXACT 12
12″ subwoofer · 4 Ω · 500 W RMS
| Source | web.archive.org · manufacturer data |
|---|---|
| Checked against source | October 2026 |
| Thiele/Small parameters | complete |
| 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, 500 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 | 53 Hz |
| F3 (−3 dB, no cabin gain) | 51 Hz |
| Example box (outside) | 14 3/16″ × 14 3/16″ × 14 3/16″ |
Ported
deeper, louder| Tuning (Fb) | 30 Hz |
|---|---|
| Port | slot 1 3/4 × 14 5/16″, 26 13/16″ long |
| Port velocity at 500 W | 64 ft/s |
| F3 (−3 dB, no cabin gain) | 30 Hz |
| Example box (outside) | 31 1/2″ × 15 3/4″ × 13 11/16″ |
Deeper: 3.18 ft³ (90 L) tuned to 30 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 | 4 Ω |
| RMS power | 500 W |
| Fs | 27 Hz |
| Qts | 0.41 |
| Qes | 0.42 |
| Qms | 11.61 |
| Vas | 3.14 ft³ |
| Re | 3.18 Ω |
|---|---|
| Sd | 82.2 in² |
| Xmax | 0.51″ |
| Vd | 42 in³ calc. |
| Mms | 155 g calc. |
| BL | 14.1 T·m calc. |
| EBP | 64 — sealed or ported calc. |
| Sensitivity, 1 W / 1 m | 88.2 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 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 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.
- Gladen Zero 12 Pro (SVC 4 ohm) 0.95 ft³ sealed · 2.33 ft³ ported
- Ground Zero GZRW 30C (4 Ohm) 0.74 ft³ sealed · 2.26 ft³ ported
- Clarion WG3020 1.34 ft³ sealed · 2.40 ft³ ported
- Ground Zero GZUW 300SQ (2x3 Ohm) 1.17 ft³ sealed · 2.26 ft³ ported
- Elemental Designs e12kd4 0.74 ft³ sealed · 2.26 ft³ ported
- Quantum Audio QSW12F 1.62 ft³ sealed · 2.40 ft³ ported
FAQ
What box does the Soundstream EXACT 12 need?
Recommended net volume: 1.09 ft³ sealed, 2.44 ft³ ported tuned to 30 Hz — for one sub in a sedan at 500 W. Fit the box to your space and amp in the free calculator, with plans and a cut sheet.
What are the Soundstream EXACT 12 Thiele/Small specs?
Fs 27 Hz, Qts 0.41, Vas 3.14 ft³, Xmax 0.51″, Sd 82.2 in².
How much power does the Soundstream EXACT 12 handle and how do I wire it?
RMS power rating: 500 W. Wiring for several subs and amp power — in the wiring calculator.