Sundown Audio NSv4-12 D2
12″ subwoofer · dual 2 Ω · 3,000 W RMS
| 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, 3,000 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) | Dry and tight · 0.40 |
|---|---|
| Fc | 45 Hz |
| F3 (−3 dB, no cabin gain) | 97 Hz |
| Example box (outside) | 14 3/16″ × 14 3/16″ × 14 3/4″ |
Ported
deeper, louder| Tuning (Fb) | 35 Hz |
|---|---|
| Port | slot 3 15/16 × 14 5/16″, 54 15/16″ long |
| Port velocity at 3,000 W | 82 ft/s |
| F3 (−3 dB, no cabin gain) | 31 Hz |
| Example box (outside) | 23 3/8″ × 15 3/4″ × 24 3/16″ |
Deeper: 1.31 ft³ (37 L) tuned to 26 Hz, 31 1/2″ × 15 3/4″ × 13 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 | 12″ |
|---|---|
| Voice coils | dual 2 Ω |
| RMS power | 3,000 W |
| Fs | 39.1 Hz |
| Qts | 0.34 |
| Qes | 0.373 |
| Qms | 4.56 |
| Vas | 0.38 ft³ |
| Re (one coil) | 1.43 Ω |
|---|---|
| Sd | 68 in² |
| Xmax | ≈ 0.39″ |
| Mms | 414 g calc. |
| BL | 19.8 T·m calc. |
| EBP | 105 — suits ported calc. |
| Sensitivity, 1 W / 1 m | 84.4 dB calc. |
Mounting dimensions
| Cutout diameter | 11 1/8″ |
|---|---|
| Mounting depth | 12 1/4″ |
| Overall diameter | 12 11/16″ |
Cone area (Sd) calculated from Fs, Vas and Mms: 68 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/20191212161612/https://sundownaudio.com/index.php/products/s
- web.archive.org/web/20210425002706/https://sundownaudio.com/lv/sa/subwoofers/ns-
Other Sundown Audio 12″ models
- Sundown Audio Ev2-12 D2 12″ · dual 2 Ω
- Sundown Audio Ev2-12 D4 12″ · dual 4 Ω
- Sundown Audio Ev4-12 D2 12″ · dual 2 Ω
- Sundown Audio Ev4-12 D4 12″ · dual 4 Ω
- Sundown Audio HZ-12 D4 12″ · dual 4 Ω
- Sundown Audio HZS-12 D4 12″ · dual 4 Ω
- Sundown Audio LCSv1-12 D4 12″ · dual 4 Ω
- Sundown Audio LCSv2-12 D4 12″ · dual 4 Ω
- Sundown Audio M12 D1 12″ · dual 1 Ω
- Sundown Audio M12 D2 12″ · dual 2 Ω
- Sundown Audio NSv1-12 D2 12″ · dual 2 Ω
- Sundown Audio NSv2-12 D2 12″ · dual 2 Ω
Similar 12″ subwoofers from other brands
Close in Fs, Qts and Vas — a box of similar volume will suit them.
- Ascendant Audio Mayhem 12 D2 0.67 ft³ sealed · 2.22 ft³ ported
- Ascendant Audio Mayhem 12 D1 0.67 ft³ sealed · 1.20 ft³ ported
- Audioque HDC412-D1-A 0.71 ft³ sealed · 2.05 ft³ ported
- DC Audio NEO 3.5 12 D0.7 0.99 ft³ sealed · 2.26 ft³ ported
- DC Audio NEO 3.5 12 D1 0.99 ft³ sealed · 2.26 ft³ ported
- DC Audio NEO 3.5 12 D2 0.99 ft³ sealed · 2.26 ft³ ported
FAQ
What box does the Sundown Audio NSv4-12 D2 need?
Recommended net volume: 1.15 ft³ sealed, 2.01 ft³ ported tuned to 35 Hz — for one sub in a sedan at 3,000 W. Fit the box to your space and amp in the free calculator, with plans and a cut sheet.
What are the Sundown Audio NSv4-12 D2 Thiele/Small specs?
Fs 39.1 Hz, Qts 0.34, Vas 0.38 ft³, Sd 68 in².
What is the Sundown Audio NSv4-12 D2 mounting depth?
Mounting depth is 12 1/4″, cutout diameter 11 1/8″. The inside depth of the box must exceed the mounting depth by at least 1″.
How much power does the Sundown Audio NSv4-12 D2 handle and how do I wire it?
RMS power rating: 3,000 W. Dual 2 Ω voice coils: series gives 4 Ω, parallel gives 1 Ω at the amp. Wiring for several subs and amp power — in the wiring calculator.