Soundstream STEALTH-13
13″ subwoofer · 4 Ω · 200 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, 200 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 · 1.13 |
|---|---|
| Fc | 40 Hz |
| F3 (−3 dB, no cabin gain) | 31 Hz |
| Example box (outside) | 31 1/2″ × 15 3/4″ × 9 5/8″ |
Ported
deeper, louder| Tuning (Fb) | 33 Hz |
|---|---|
| Port | slot 1 9/16 × 14 5/16″, 36 5/16″ long |
| Port velocity at 200 W | 23 ft/s |
| F3 (−3 dB, no cabin gain) | 30 Hz |
| Example box (outside) | 31 1/2″ × 15 3/4″ × 10″ |
Deeper: 3.32 ft³ (94 L) tuned to 29 Hz, 31 1/2″ × 15 3/4″ × 16 3/8″ 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 | 13″ |
|---|---|
| Voice coils | 4 Ω |
| RMS power | 200 W |
| Fs | 30.2 Hz |
| Qts | 0.85 |
| Qes | 1.52 |
| Qms | 1.92 |
| Vas | 1.49 ft³ |
| Re | 3.6 Ω |
|---|---|
| Sd | 85.5 in² |
| Xmax | 0.24″ |
| Vd | 20.2 in³ calc. |
| Mms | 284 g calc. |
| BL | 11.3 T·m calc. |
| EBP | 20 — suits sealed calc. |
| Sensitivity, 1 W / 1 m | 80.8 dB calc. |
Mounting dimensions
| Cutout diameter | 11 3/8″ |
|---|---|
| Mounting depth | 2″ |
| Overall diameter | 13 1/4″ |
“≈” 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
Similar 13″ subwoofers from other brands
Close in Fs, Qts and Vas — a box of similar volume will suit them.
- Focal K2 Power 33 KX (DVC 2+2 ohm) 1.73 ft³ sealed · 1.20 ft³ ported
- Focal Performance Sub P 33 V2 (DVC 4+4 ohm) 1.87 ft³ sealed · 2.15 ft³ ported
- Focal Utopia Be 33 WX2 (SVC 4 ohm) 0.78 ft³ sealed · 2.54 ft³ ported
FAQ
What box does the Soundstream STEALTH-13 need?
Recommended net volume: 1.94 ft³ sealed, 1.38 ft³ ported tuned to 33 Hz — for one sub in a sedan at 200 W. Fit the box to your space and amp in the free calculator, with plans and a cut sheet.
What are the Soundstream STEALTH-13 Thiele/Small specs?
Fs 30.2 Hz, Qts 0.85, Vas 1.49 ft³, Xmax 0.24″, Sd 85.5 in².
What is the Soundstream STEALTH-13 mounting depth?
Mounting depth is 2″, cutout diameter 11 3/8″. The inside depth of the box must exceed the mounting depth by at least 1″.
How much power does the Soundstream STEALTH-13 handle and how do I wire it?
RMS power rating: 200 W. Wiring for several subs and amp power — in the wiring calculator.