Quantum Audio QFW10D4
10″ subwoofer · dual 4 Ω
| Source | web.archive.org · manufacturer data |
|---|---|
| Checked against source | October 2026 |
| Thiele/Small parameters | not in the spec sheet: Xmax — typical value for the size used |
| Mounting dimensions | 3 of 4 — missing: 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 · 0.72 |
|---|---|
| Fc | 72 Hz |
| F3 (−3 dB, no cabin gain) | 74 Hz |
| Example box (outside) | 12 3/16″ × 12 3/16″ × 8 5/8″ |
Ported
deeper, louder| Tuning (Fb) | 47 Hz |
|---|---|
| Port | 2 round ports Ø2 1/2″, 14 7/16″ long |
| Port velocity at 300 W | 90 ft/s |
| F3 (−3 dB, no cabin gain) | 44 Hz |
| Example box (outside) | 18 5/8″ × 15 3/4″ × 7 7/8″ |
At 300 W this example’s port will be noisy: air speed 90 ft/s, while the limit is 82 ft/s. It stays quiet up to about 240 W. Full power needs a port of at least 11 in², which means a bigger box than this example — size it in the designer.
Open ported box in designerDeeper: 0.99 ft³ (28 L) tuned to 42 Hz, 24 13/16″ × 15 3/4″ × 7 7/8″ 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 | 10″ |
|---|---|
| Voice coils | dual 4 Ω |
| RMS power | — |
| Fs | 45.6 Hz |
| Qts | 0.46 |
| Qes | 0.5 |
| Qms | 5.58 |
| Vas | 0.63 ft³ |
| Re (one coil) | 3.2 Ω |
|---|---|
| Sd | 46 in² |
| Xmax | ≈ 0.39″ |
| Mms | 86 g calc. |
| BL | 12.6 T·m calc. |
| EBP | 91 — sealed or ported calc. |
| Sensitivity, 1 W / 1 m | 87.3 dB calc. |
Mounting dimensions
| Cutout diameter | 9 3/16″ |
|---|---|
| Mounting depth | 5 3/8″ |
| Overall diameter | 10 3/8″ |
Cone area (Sd) calculated from Fs, Vas and Mms: 46 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
Other Quantum Audio 10″ models
- Quantum Audio Q2000/10D 10″ · dual 4 Ω
- Quantum Audio QPW3000/10D4 10″ · dual 4 Ω
- Quantum Audio QSW10F 10″ · 4 Ω
- Quantum Audio QW1000/10D4 10″ · dual 4 Ω
- Quantum Audio QW1000/10S4 10″ · 4 Ω
- Quantum Audio QWX2000/10D4 10″ · dual 4 Ω
- Quantum Audio QWX4000/10D4 10″ · dual 4 Ω
Similar 10″ subwoofers from other brands
Close in Fs, Qts and Vas — a box of similar volume will suit them.
- Sundown Audio HZS-10 D4 0.53 ft³ sealed · 0.88 ft³ ported
- Kicker CompVX 10" 4-Ohm DVC (50CVX104) 0.49 ft³ sealed · 0.88 ft³ ported
- Soundstream XPRO-10 0.49 ft³ sealed · 0.85 ft³ ported
- Skar Audio VD-10 D2 0.49 ft³ sealed · 1.27 ft³ ported
- Orion HCCA 10D (1999) 0.46 ft³ sealed · 0.81 ft³ ported
- Orion HCCA 10D 0.46 ft³ sealed · 1.48 ft³ ported
FAQ
What box does the Quantum Audio QFW10D4 need?
Recommended net volume: 0.42 ft³ sealed, 0.74 ft³ ported tuned to 47 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 Quantum Audio QFW10D4 Thiele/Small specs?
Fs 45.6 Hz, Qts 0.46, Vas 0.63 ft³, Sd 46 in².
What is the Quantum Audio QFW10D4 mounting depth?
Mounting depth is 5 3/8″, cutout diameter 9 3/16″. The inside depth of the box must exceed the mounting depth by at least 1″.