Sundown Audio Xv2-15 D2
15″ subwoofer · dual 2 Ω · 1,500 W RMS
| Source | web.archive.org · manufacturer data |
|---|---|
| Checked against source | October 2026 |
| Thiele/Small parameters | complete |
| Mounting dimensions | 2 of 4 — missing: frame outer diameter, magnet diameter; the designer will use an estimate |
Recommended box
For a sedan, one sub, 1,500 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 · 0.57 |
|---|---|
| Fc | 46 Hz |
| F3 (−3 dB, no cabin gain) | 62 Hz |
| Example box (outside) | 16 15/16″ × 16 15/16″ × 13 5/16″ |
Ported
deeper, louder| Tuning (Fb) | 33 Hz |
|---|---|
| Port | slot 3 15/16 × 16 5/16″, 40 13/16″ long |
| Port velocity at 1,500 W | 63 ft/s |
| F3 (−3 dB, no cabin gain) | 30 Hz |
| Example box (outside) | 31 1/2″ × 17 11/16″ × 19 13/16″ |
Deeper: 2.15 ft³ (61 L) tuned to 31 Hz, 25 5/16″ × 17 11/16″ × 18 1/8″ 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 | 15″ |
|---|---|
| Voice coils | dual 2 Ω |
| RMS power | 1,500 W |
| Fs | 29.6 Hz |
| Qts | 0.37 |
| Qes | 0.4 |
| Qms | 4.65 |
| Vas | 2.08 ft³ |
| Re (one coil) | 1.9 Ω |
|---|---|
| Sd | 112.6 in² |
| Xmax | 1.18″ |
| Vd | 133 in³ calc. |
| Mms | 367 g calc. |
| BL | 18 T·m calc. |
| EBP | 74 — sealed or ported calc. |
| Sensitivity, 1 W / 1 m | 87.8 dB calc. |
Mounting dimensions
| Cutout diameter | 13 13/16″ |
|---|---|
| Mounting depth | 10 7/8″ |
Cone area (Sd) calculated from Fs, Vas and Mms: 112.6 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 Sundown Audio 15″ models
- Sundown Audio Ev2-15 D2 15″ · dual 2 Ω
- Sundown Audio Ev2-15 D4 15″ · dual 4 Ω
- Sundown Audio Ev4-15 D2 15″ · dual 2 Ω
- Sundown Audio Ev4-15 D4 15″ · dual 4 Ω
- Sundown Audio M15 D1 15″ · dual 1 Ω
- Sundown Audio M15 D2 15″ · dual 2 Ω
- Sundown Audio NSv1-15 D2 15″ · dual 2 Ω
- Sundown Audio NSv2-15 D2 15″ · dual 2 Ω
- Sundown Audio NSv4-15 D1 15″ · dual 1 Ω
- Sundown Audio NSv4-15 D2 15″ · dual 2 Ω
- Sundown Audio NSv6-15 D1 15″ · dual 1 Ω
- Sundown Audio NSv6-15 D2 15″ · dual 2 Ω
Similar 15″ subwoofers from other brands
Close in Fs, Qts and Vas — a box of similar volume will suit them.
- Kicx HeadShot 15 (1+1) 1.09 ft³ sealed · 3.57 ft³ ported
- SoundQubed HDX415 D1 1.27 ft³ sealed · 3.78 ft³ ported
- Audiopipe TXX-BD4-15 1.20 ft³ sealed · 3.92 ft³ ported
- Kicx ZT15V2 (2+2) 1.09 ft³ sealed · 3.57 ft³ ported
- Magnum MXW 15-22DC 1.13 ft³ sealed · 1.98 ft³ ported
- Fi Audio NEO 4.9 15 D1 1.59 ft³ sealed · 3.71 ft³ ported
FAQ
What box does the Sundown Audio Xv2-15 D2 need?
Recommended net volume: 1.48 ft³ sealed, 3.32 ft³ ported tuned to 33 Hz — for one sub in a sedan at 1,500 W. Fit the box to your space and amp in the free calculator, with plans and a cut sheet.
What are the Sundown Audio Xv2-15 D2 Thiele/Small specs?
Fs 29.6 Hz, Qts 0.37, Vas 2.08 ft³, Xmax 1.18″, Sd 112.6 in².
What is the Sundown Audio Xv2-15 D2 mounting depth?
Mounting depth is 10 7/8″, cutout diameter 13 13/16″. The inside depth of the box must exceed the mounting depth by at least 1″.
How much power does the Sundown Audio Xv2-15 D2 handle and how do I wire it?
RMS power rating: 1,500 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.