Helix W10 Competition (1x4 Ohm)
10″ subwoofer · 4 Ω · 300 W RMS
| Source | web.archive.org · manufacturer data |
|---|---|
| Checked against source | October 2026 |
| Thiele/Small parameters | complete |
| Mounting dimensions | 1 of 4 — missing: cutout, frame outer diameter, magnet diameter; the designer will use an estimate |
Recommended box
For a sedan, one sub, 300 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) | Flat and accurate · 0.66 |
|---|---|
| Fc | 62 Hz |
| F3 (−3 dB, no cabin gain) | 71 Hz |
| Example box (outside) | 12 3/16″ × 12 3/16″ × 9 11/16″ |
Ported
deeper, louder| Tuning (Fb) | 34 Hz |
|---|---|
| Port | slot 1 9/16 × 14 5/16″, 28 15/16″ long |
| Port velocity at 300 W | 53 ft/s |
| F3 (−3 dB, no cabin gain) | 32 Hz |
| Example box (outside) | 31 1/2″ × 15 3/4″ × 10 1/8″ |
Deeper: 1.02 ft³ (29 L) tuned to 37 Hz, 31 1/2″ × 15 3/4″ × 8 9/16″ 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 | 10″ |
|---|---|
| Voice coils | 4 Ω |
| RMS power | 300 W |
| Fs | 31 Hz |
| Qts | 0.33 |
| Qes | 0.37 |
| Qms | 2.97 |
| Vas | 1.50 ft³ |
| Re | 2.8 Ω |
|---|---|
| Sd | 53.4 in² |
| Xmax | 0.31″ |
| Vd | 16.8 in³ calc. |
| Mms | 104 g calc. |
| BL | 12.4 T·m calc. |
| EBP | 84 — sealed or ported calc. |
| Sensitivity, 1 W / 1 m | 87.3 dB calc. |
Mounting dimensions
| Cutout diameter | ≈ 9 1/8″ |
|---|---|
| Mounting depth | 5 1/16″ |
Cone area (Sd) calculated from Fs, Vas and Mms: 53.4 in².
“≈” 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
- web.archive.org/web/20060226043724/http://www.audiotec-fischer.com:80/pdfs/Woofe
- web.archive.org/web/20060311213645/http://www.audiotec-fischer.com/pdfs/HelixPro
- web.archive.org/web/20061016233435/http://www.audiotec-fischer.com/pdfs/Helix%20
Other Helix 10″ models
- Helix DB 10 Deep Blue (1x4 Ohm) 10″ · 4 Ω
- Helix IK S10-DVC2 (2x2 Ohm) 10″ · dual 2 Ω
- Helix IK S10-SVC2 (1x2 Ohm) 10″ · 2 Ω
- Helix IK W10-DVC2 (2x2 Ohm) 10″ · dual 2 Ω
- Helix IK W10-SVC2 (1x2 Ohm) 10″ · 2 Ω
- Helix IQ W10-DVC2 (2x2 Ohm) 10″ · dual 2 Ω
- Helix K 10S-DVC2 (2x2 Ohm) 10″ · dual 2 Ω
- Helix K 10W-SVC2 (1x2 Ohm) 10″ · 2 Ω
Similar 10″ subwoofers from other brands
Close in Fs, Qts and Vas — a box of similar volume will suit them.
- Cadence CM10D2 0.49 ft³ sealed · 1.55 ft³ ported
- Gladen RS 10 (SVC 4 ohm) 0.53 ft³ sealed · 1.70 ft³ ported
- ESX SX1040 (4 Ohm) 0.46 ft³ sealed · 1.52 ft³ ported
- STX W.25.400.2x4.MC 0.46 ft³ sealed · 1.45 ft³ ported
- Morel Ultimo SC 102 (SVC 2 ohm) 0.49 ft³ sealed · 1.59 ft³ ported
- Morel Ultimo SC 104 (SVC 4 ohm) 0.49 ft³ sealed · 1.59 ft³ ported
FAQ
What box does the Helix W10 Competition (1x4 Ohm) need?
Recommended net volume: 0.49 ft³ sealed, 1.59 ft³ ported tuned to 34 Hz — for one sub in a sedan at 300 W. Fit the box to your space and amp in the free calculator, with plans and a cut sheet.
What are the Helix W10 Competition (1x4 Ohm) Thiele/Small specs?
Fs 31 Hz, Qts 0.33, Vas 1.50 ft³, Xmax 0.31″, Sd 53.4 in².
What is the Helix W10 Competition (1x4 Ohm) mounting depth?
Mounting depth is 5 1/16″. The inside depth of the box must exceed the mounting depth by at least 1″.
How much power does the Helix W10 Competition (1x4 Ohm) handle and how do I wire it?
RMS power rating: 300 W. Wiring for several subs and amp power — in the wiring calculator.