Sundown Audio NSv1-15 D2
15″ subwoofer · dual 2 Ω · 1,500 W RMS
The Sundown Audio NSv1-15 D2 is a 15″ subwoofer. With Qts 0.44 and EBP 83 it works both sealed and ported: sealed is tighter and smaller, ported is deeper and louder.
| Source | web.archive.org · manufacturer data |
|---|---|
| Checked against source | October 2026 |
| Thiele/Small parameters | not in the spec sheet: Sd, 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, 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 · 0.61 |
|---|---|
| Fc | 53 Hz |
| F3 (−3 dB, no cabin gain) | 65 Hz |
| Example box (outside) | 16 15/16″ × 16 15/16″ × 12 3/16″ |
Ported
deeper, louder| Tuning (Fb) | 34 Hz |
|---|---|
| Port | slot 2 3/4 × 16 5/16″, 47″ long |
| Port velocity at 1,500 W | 67 ft/s |
| F3 (−3 dB, no cabin gain) | 32 Hz |
| Example box (outside) | 26 3/16″ × 17 11/16″ × 16 15/16″ |
Deeper: 2.37 ft³ (67 L) tuned to 33 Hz, 31 1/2″ × 17 11/16″ × 16 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 | 15″ |
|---|---|
| Voice coils | dual 2 Ω |
| RMS power | 1,500 W |
| Fs | 38 Hz |
| Qts | 0.44 |
| Qes | 0.46 |
| Qms | 8.64 |
| Vas | 1.29 ft³ |
|---|---|
| Re (one coil) | 1.45 Ω |
| Sd | ≈ 124 in² |
| Xmax | ≈ 0.39″ |
| EBP | 83 — sealed or ported calc. |
| Sensitivity, 1 W / 1 m | 88.4 dB calc. |
Mounting dimensions
| Cutout diameter | 13 7/8″ |
|---|---|
| Mounting depth | 9 3/4″ |
| Overall diameter | 15 1/2″ |
Where it fits in a vehicle
Spots from our vehicle guides where the cutout, mounting depth and recommended box fit. The spot sizes are approximate — measure your own vehicle.
- Excursion — behind the third row sealed and ported box
- Club Car Precedent — under the rear seat sealed box
“≈” 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 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
- Sundown Audio SA Classic 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.
- American Bass VFLCOMP-1511 1.38 ft³ sealed · 1.94 ft³ ported
- Ground Zero GZHW 15XSPL-D1 (2x1 Ohm) 1.18 ft³ sealed · 2.05 ft³ ported
- DS18 Hooligan X HOOL-X15.2DSPL 1.61 ft³ sealed · 1.87 ft³ ported
- Ascendant Audio Mayhem 15 D2 1.13 ft³ sealed · 2.01 ft³ ported
- Fi Audio SSD15 D2 1.15 ft³ sealed · 3.71 ft³ ported
- Gladen SPL 15 (DVC) 1.45 ft³ sealed · 2.05 ft³ ported
All 15″ subwoofers in our database →
FAQ
What box does the Sundown Audio NSv1-15 D2 need?
Recommended net volume: 1.32 ft³ sealed, 1.98 ft³ ported tuned to 34 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 NSv1-15 D2 Thiele/Small specs?
Fs 38 Hz, Qts 0.44, Vas 1.29 ft³.
What is the Sundown Audio NSv1-15 D2 mounting depth?
Mounting depth is 9 3/4″, cutout diameter 13 7/8″. The inside depth of the box must exceed the mounting depth by at least 1″.
How much power does the Sundown Audio NSv1-15 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.
Is the Sundown Audio NSv1-15 D2 better sealed or ported?
EBP 83: both work — sealed 1.32 ft³ is tighter and smaller, ported 1.98 ft³ tuned to 34 Hz is deeper and louder.
What port does the Sundown Audio NSv1-15 D2 need?
For the 1.98 ft³ ported box tuned to 34 Hz: slot 2 3/4 × 16 5/16″, 47″ long, area 44.9 in²; or a round port Ø7 9/16″, ≈ 47″ long. Port air speed at 1,500 W: 67 ft/s.
What box do two Sundown Audio NSv1-15 D2 subs need?
Two subs need twice the volume: 2.65 ft³ sealed, or 3.96 ft³ ported at the same 34 Hz tuning with twice the port area. One shared chamber or one per sub — whatever fits your vehicle.