Vibe Audio BlackAir 15 D2 (BLACKAIR15D2-V7)
15″ subwoofer · dual 2 Ω · 1,000 W RMS
The Vibe Audio BlackAir 15 D2 (BLACKAIR15D2-V7) is a 15″ subwoofer. With Qts 0.46 and EBP 55 it works both sealed and ported: sealed is tighter and smaller, ported is deeper and louder.
| Source | vibeaudio.co.uk · manufacturer data |
|---|---|
| Checked against source | October 2026 |
| Thiele/Small parameters | complete |
| Mounting dimensions | 1 of 4 — missing: mounting depth, frame outer diameter, magnet diameter; the designer will use an estimate |
Recommended box
For a sedan, one sub, 1,000 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 · 0.80 |
|---|---|
| Fc | 49 Hz |
| F3 (−3 dB, no cabin gain) | 47 Hz |
| Example box (outside) | 17 5/16″ × 17 5/16″ × 10 13/16″ |
Ported
deeper, louder| Tuning (Fb) | 31 Hz |
|---|---|
| Port | slot 1 15/16 × 16 11/16″, 41 1/2″ long |
| Port velocity at 1,000 W | 60 ft/s |
| F3 (−3 dB, no cabin gain) | 31 Hz |
| Example box (outside) | 31 1/2″ × 18 1/8″ × 12 5/16″ |
Deeper: 3.92 ft³ (111 L) tuned to 27 Hz, 31 1/2″ × 18 1/8″ × 19 11/16″ 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 | 15″ |
|---|---|
| Voice coils | dual 2 Ω |
| RMS power | 1,000 W |
| Fs | 28 Hz |
| Qts | 0.46 |
| Qes | 0.51 |
| Qms | 4.39 |
| Vas | 2.46 ft³ |
| Re (one coil) | 2 Ω |
|---|---|
| Sd | 116.3 in² |
| Xmax | 0.69″ |
| Vd | 80.1 in³ calc. |
| Mms | 369 g calc. |
| BL | 16 T·m calc. |
| EBP | 55 — sealed or ported calc. |
| Sensitivity, 1 W / 1 m | 86.8 dB calc. |
Mounting dimensions
| Cutout diameter | 14 1/8″ |
|---|---|
| Mounting depth | ≈ 7 1/16″ |
Judging by its value, the published Re is for both coils in series — converted to per coil.
“≈” 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
- vibeaudio.co.uk/wp-content/uploads/2019/08/Blackair-subwoofer-manual-050718.pdf
- vibeaudio.co.uk/wp-content/uploads/2025/09/Blackair-subwoofer-manual-050718.pdf
Other Vibe Audio 15″ models
- 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 D2 SPL (BD15D2SPL-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.
- Sundown Audio Zv4-15 D2 1.64 ft³ sealed · 1.91 ft³ ported
- Fi Audio SP4 15 D2 1.62 ft³ sealed · 2.01 ft³ ported
- Fi Audio SP415 v2.1 D2 1.59 ft³ sealed · 2.01 ft³ ported
- Fi Audio BTL4 15 D2 1.27 ft³ sealed · 2.01 ft³ ported
- Fi Audio BTL4 15 D1 1.27 ft³ sealed · 2.01 ft³ ported
- Sundown Audio Zv5-15 D2 1.70 ft³ sealed · 1.91 ft³ ported
All 15″ subwoofers in our database →
FAQ
What box does the Vibe Audio BlackAir 15 D2 (BLACKAIR15D2-V7) need?
Recommended net volume: 1.20 ft³ sealed, 1.98 ft³ ported tuned to 31 Hz — for one sub in a sedan at 1,000 W. Fit the box to your space and amp in the free calculator, with plans and a cut sheet.
What are the Vibe Audio BlackAir 15 D2 (BLACKAIR15D2-V7) Thiele/Small specs?
Fs 28 Hz, Qts 0.46, Vas 2.46 ft³, Xmax 0.69″, Sd 116.3 in².
How much power does the Vibe Audio BlackAir 15 D2 (BLACKAIR15D2-V7) handle and how do I wire it?
RMS power rating: 1,000 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 BlackAir 15 D2 (BLACKAIR15D2-V7) better sealed or ported?
EBP 55: both work — sealed 1.20 ft³ is tighter and smaller, ported 1.98 ft³ tuned to 31 Hz is deeper and louder.
What port does the Vibe Audio BlackAir 15 D2 (BLACKAIR15D2-V7) need?
For the 1.98 ft³ ported box tuned to 31 Hz: slot 1 15/16 × 16 11/16″, 41 1/2″ long, area 32.9 in²; or a round port Ø6 7/16″, ≈ 41 1/2″ long. Port air speed at 1,000 W: 60 ft/s.
What box do two Vibe Audio BlackAir 15 D2 (BLACKAIR15D2-V7) subs need?
Two subs need twice the volume: 2.40 ft³ sealed, or 3.96 ft³ ported at the same 31 Hz tuning with twice the port area. One shared chamber or one per sub — whatever fits your vehicle.