Quantum Audio QW3000/12D4
12″ subwoofer · dual 4 Ω
| 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, 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) | Boomy, with a bump · 1.02 |
|---|---|
| Fc | 47 Hz |
| F3 (−3 dB, no cabin gain) | 38 Hz |
| Example box (outside) | 31 1/2″ × 15 3/4″ × 9 3/8″ |
Ported
deeper, louder| Tuning (Fb) | 34 Hz |
|---|---|
| Port | slot 1 9/16 × 14 5/16″, 36″ long |
| Port velocity at 300 W | 37 ft/s |
| F3 (−3 dB, no cabin gain) | 33 Hz |
| Example box (outside) | 21 7/16″ × 15 3/4″ × 13 3/4″ |
Deeper: 3.18 ft³ (90 L) tuned to 32 Hz, 31 1/2″ × 15 3/4″ × 15 13/16″ 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 | 12″ |
|---|---|
| Voice coils | dual 4 Ω |
| RMS power | — |
| Fs | 37.4 Hz |
| Qts | 0.80 |
| Qes | 0.94 |
| Qms | 5.54 |
| Vas | 1.13 ft³ |
| Re (one coil) | 3.4 Ω |
|---|---|
| Sd | 82.4 in² |
| Xmax | 0.60″ |
| Vd | 49.3 in³ calc. |
| Mms | 226 g calc. |
| BL | 13.9 T·m calc. |
| EBP | 40 — suits sealed calc. |
| Sensitivity, 1 W / 1 m | 84.5 dB calc. |
Mounting dimensions
| Cutout diameter | 10 13/16″ |
|---|---|
| Mounting depth | 6 1/2″ |
| Overall diameter | 12 7/16″ |
Cone area (Sd) calculated from Fs, Vas and Mms: 82.4 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
Other Quantum Audio 12″ models
- Quantum Audio Q800/12D 12″ · dual 4 Ω
- Quantum Audio Q800/12S 12″ · 4 Ω
- Quantum Audio Q2000/12D 12″ · dual 4 Ω
- Quantum Audio Q2500/12D 12″ · dual 4 Ω
- Quantum Audio Q3000/12D 12″ · dual 4 Ω
- Quantum Audio QFW12D4 12″ · dual 4 Ω
- Quantum Audio QPW3000/12D4 12″ · dual 4 Ω
- Quantum Audio QSW12F 12″ · 4 Ω
- Quantum Audio QW1000/12D4 12″ · dual 4 Ω
- Quantum Audio QW1000/12S4 12″ · 4 Ω
- Quantum Audio QW5000/12D4 12″ · dual 4 Ω
- Quantum Audio QWX2000/12D4 12″ · dual 4 Ω
Similar 12″ subwoofers from other brands
Close in Fs, Qts and Vas — a box of similar volume will suit them.
- Pioneer TS-W309D4 1.73 ft³ sealed · 1.20 ft³ ported
- Spyder Nitro 12 350W S2 1.73 ft³ sealed · 1.20 ft³ ported
- Spyder Nitro 12 350W S4 1.73 ft³ sealed · 1.20 ft³ ported
- Pioneer TS-W310D4 1.73 ft³ sealed · 1.20 ft³ ported
- Ascendant Audio Arsenal 12 D1 1.70 ft³ sealed · 1.20 ft³ ported
- Skar Audio VS-12 D4 1.87 ft³ sealed · 2.01 ft³ ported
FAQ
What box does the Quantum Audio QW3000/12D4 need?
Recommended net volume: 1.87 ft³ sealed, 1.31 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 Quantum Audio QW3000/12D4 Thiele/Small specs?
Fs 37.4 Hz, Qts 0.80, Vas 1.13 ft³, Xmax 0.60″, Sd 82.4 in².
What is the Quantum Audio QW3000/12D4 mounting depth?
Mounting depth is 6 1/2″, cutout diameter 10 13/16″. The inside depth of the box must exceed the mounting depth by at least 1″.