Vibe Audio BlackDeath 15 D2 SPL (BD15D2SPL-V4)
15″ subwoofer · dual 2 Ω · 3,000 W RMS
The Vibe Audio BlackDeath 15 D2 SPL (BD15D2SPL-V4) is a 15″ subwoofer. With Qts 0.71 and EBP 37 it suits a sealed box: tight bass in a small enclosure; a ported box would need a lot of volume.
| Source | vibeaudio.co.uk · 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 |
- Fs, Vas and Sd don't match the moving mass of 317.661 g (they give 449 g) — one of the spec sheet values is probably wrong.
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) | Tight and punchy · 0.87 |
|---|---|
| Fc | 45 Hz |
| F3 (−3 dB, no cabin gain) | 39 Hz |
| Example box (outside) | 17 5/16″ × 17 5/16″ × 19″ |
Ported
deeper, louder| Tuning (Fb) | 34 Hz |
|---|---|
| Port | slot 2 9/16 × 16 11/16″, 47 3/8″ long |
| Port velocity at 3,000 W | 76 ft/s |
| F3 (−3 dB, no cabin gain) | 30 Hz |
| Example box (outside) | 24 1/16″ × 18 1/8″ × 17 5/16″ |
Deeper: 4.52 ft³ (128 L) tuned to 27 Hz, 31 1/2″ × 18 1/8″ × 28 1/4″ 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 | 3,000 W |
| Fs | 36.7 Hz |
| Qts | 0.71 |
| Qes | 1 |
| Qms | 2.44 |
| Vas | 1.20 ft³ |
| Re (one coil) | 1.9 Ω |
|---|---|
| Sd | 117 in² |
| Xmax | 0.98″ |
| Vd | 115.2 in³ calc. |
| Mms | 449 g calc. |
| BL | 14 T·m calc. |
| EBP | 37 — suits sealed calc. |
| Sensitivity, 1 W / 1 m | 84.2 dB calc. |
Mounting dimensions
| Cutout diameter | 14 1/16″ |
|---|---|
| Mounting depth | 10 3/16″ |
| Overall diameter | 15 7/16″ |
“≈” 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 Vibe Audio 15″ models
- Vibe Audio BlackAir 15 D2 (BLACKAIR15D2-V7) 15″ · dual 2 Ω
- Vibe Audio BlackDeath 15 D1 SPL (BD15D1SPL-V4) 15″ · dual 1 Ω
- Vibe Audio BlackDeath 15 D2 (BD15D2-V4) 15″ · dual 2 Ω
- Vibe Audio BlackDeath 15 D4 (BD15D4-V4) 15″ · dual 4 Ω
- Vibe Audio BlackDeath 15 HEX D1 (BLACKDEATH15HEX-V7) 15″ · dual 1 Ω
- Vibe Audio BlackDeath Comp 15 HEX D1 (BLACKDEATHC15HEX-V7) 15″ · dual 1 Ω
Similar 15″ subwoofers from other brands
Close in Fs, Qts and Vas — a box of similar volume will suit them.
- Machete M15 Super Sport D2 2.83 ft³ sealed · 1.98 ft³ ported
- Machete M15 Super Sport D1 2.26 ft³ sealed · 1.98 ft³ ported
- American Bass XR-1522 2.75 ft³ sealed · 3.25 ft³ ported
- Quantum Audio QW5000/15D4 2.93 ft³ sealed · 2.05 ft³ ported
- Swat SW R15D4 2.22 ft³ sealed · 1.98 ft³ ported
- Kicker Solo-Baric L7X 15" 2-Ohm DVC (49L7X152) 2.61 ft³ sealed · 5.01 ft³ ported
All 15″ subwoofers in our database →
FAQ
What box does the Vibe Audio BlackDeath 15 D2 SPL (BD15D2SPL-V4) need?
Recommended net volume: 2.40 ft³ sealed, 1.87 ft³ ported tuned to 34 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 Vibe Audio BlackDeath 15 D2 SPL (BD15D2SPL-V4) Thiele/Small specs?
Fs 36.7 Hz, Qts 0.71, Vas 1.20 ft³, Xmax 0.98″, Sd 117 in².
What is the Vibe Audio BlackDeath 15 D2 SPL (BD15D2SPL-V4) mounting depth?
Mounting depth is 10 3/16″, cutout diameter 14 1/16″. The inside depth of the box must exceed the mounting depth by at least 1″.
How much power does the Vibe Audio BlackDeath 15 D2 SPL (BD15D2SPL-V4) 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.
Is the Vibe Audio BlackDeath 15 D2 SPL (BD15D2SPL-V4) better sealed or ported?
EBP 37: a sealed box (2.40 ft³) suits it best — tight bass in a compact enclosure. Ported is possible (1.87 ft³, tuned to 34 Hz) but larger.
What port does the Vibe Audio BlackDeath 15 D2 SPL (BD15D2SPL-V4) need?
For the 1.87 ft³ ported box tuned to 34 Hz: slot 2 9/16 × 16 11/16″, 47 3/8″ long, area 42.7 in²; or a round port Ø7 3/8″, ≈ 47 3/8″ long. Port air speed at 3,000 W: 76 ft/s.
What box do two Vibe Audio BlackDeath 15 D2 SPL (BD15D2SPL-V4) subs need?
Two subs need twice the volume: 4.80 ft³ sealed, or 3.74 ft³ ported at the same 34 Hz tuning with twice the port area. One shared chamber or one per sub — whatever fits your vehicle.