Vibe Audio BlackAir 12 D2 (V4)
12″ subwoofer · dual 2 Ω · 550 W RMS
The Vibe Audio BlackAir 12 D2 (V4) is a 12″ subwoofer. With Qts 0.63 and EBP 43 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 | 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, 550 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 · 0.90 |
|---|---|
| Fc | 42 Hz |
| F3 (−3 dB, no cabin gain) | 36 Hz |
| Example box (outside) | 31 1/2″ × 15 3/4″ × 8 15/16″ |
Ported
deeper, louder| Tuning (Fb) | 32 Hz |
|---|---|
| Port | slot 1 9/16 × 14 5/16″, 35 13/16″ long |
| Port velocity at 550 W | 51 ft/s |
| F3 (−3 dB, no cabin gain) | 31 Hz |
| Example box (outside) | 31 1/2″ × 15 3/4″ × 10 3/8″ |
Deeper: 3.00 ft³ (85 L) tuned to 30 Hz, 31 1/2″ × 15 3/4″ × 16 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 | 12″ |
|---|---|
| Voice coils | dual 2 Ω |
| RMS power | 550 W |
| Fs | 29 Hz |
| Qts | 0.63 |
| Qes | 0.681 |
| Qms | 8.2 |
| Vas | 1.87 ft³ |
| Re (one coil) | 2.15 Ω |
|---|---|
| Sd | 77.2 in² |
| Xmax | ≈ 0.39″ |
| Mms | 200 g calc. |
| BL | 10.7 T·m calc. |
| EBP | 43 — suits sealed calc. |
| Sensitivity, 1 W / 1 m | 84.8 dB calc. |
Mounting dimensions
| Cutout diameter | 11 1/4″ |
|---|---|
| Mounting depth | 6 1/8″ |
| Overall diameter | 12 11/16″ |
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.
- Bronco 4-door — behind the rear seat sealed and ported box
- Wrangler 4-door, hard top — behind the rear seat sealed and ported box
- Wrangler 4-door, soft top — behind the rear seat sealed and ported box
- Silverado / Sierra Crew Cab — under the rear seat sealed and ported box
- FJ Cruiser — behind the rear seat sealed and ported box
- El Camino 1978–87 — behind the seat sealed and ported box
- Cherokee XJ — cargo area, spare moved out sealed and ported box
- Excursion — behind the third row sealed and ported box
- Mustang 2015–2023 coupe — trunk sealed and ported box
- Challenger / Charger — trunk sealed and ported box
- Club Car Precedent — under the rear seat sealed and ported box
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
Other Vibe Audio 12″ models
- Vibe Audio BlackAir 12 D2 (BA12D2-V5) 12″ · dual 2 Ω
- Vibe Audio BlackAir 12 D2 (BLACKAIR12D2-V7) 12″ · dual 2 Ω
- Vibe Audio BlackAir 12 D2S (BLACKAIR12D2S-V3) 12″ · dual 2 Ω
- Vibe Audio BlackDeath 12 D1 SPL (BD12D1SPL-V4) 12″ · dual 1 Ω
- Vibe Audio BlackDeath 12 D2 (BD12D2-V4) 12″ · dual 2 Ω
- Vibe Audio BlackDeath 12 D2 SPL (BD12D2SPL-V4) 12″ · dual 2 Ω
- Vibe Audio BlackDeath 12 D4 (BD12D4-V4) 12″ · dual 4 Ω
- Vibe Audio BlackDeath 12 HEX D1 (BLACKDEATH12HEX-V7) 12″ · dual 1 Ω
- Vibe Audio BlackDeath Comp 12 HEX D1 (BLACKDEATHC12HEX-V7) 12″ · dual 1 Ω
- Vibe Audio Pulse 12 (PULSE12-V0) 12″ · 4 Ω
- Vibe Audio Pulse 12 D2 (PULSE12D2-V3) 12″ · dual 2 Ω
- Vibe Audio Slick 12 D2 (SLICK12D2-V0) 12″ · dual 2 Ω
Similar 12″ subwoofers from other brands
Close in Fs, Qts and Vas — a box of similar volume will suit them.
- Rockford Fosgate Punch HE2 RFP4212 1.80 ft³ sealed · 1.55 ft³ ported
- Rockford Fosgate Power T1D412 1.94 ft³ sealed · 1.59 ft³ ported
- Soundstream R1-12 1.73 ft³ sealed · 1.48 ft³ ported
- JBL GT5-12 1.87 ft³ sealed · 1.52 ft³ ported
- Kicker CompRT 12" 1-Ohm DVC (43CWRT121) 1.80 ft³ sealed · 1.52 ft³ ported
- Cerwin-Vega Mobile Stroker PRO 12 (12" DVC 2ohm) 1.73 ft³ sealed · 1.20 ft³ ported
All 12″ subwoofers in our database →
FAQ
What box does the Vibe Audio BlackAir 12 D2 (V4) need?
Recommended net volume: 1.77 ft³ sealed, 1.48 ft³ ported tuned to 32 Hz — for one sub in a sedan at 550 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 12 D2 (V4) Thiele/Small specs?
Fs 29 Hz, Qts 0.63, Vas 1.87 ft³, Sd 77.2 in².
What is the Vibe Audio BlackAir 12 D2 (V4) mounting depth?
Mounting depth is 6 1/8″, cutout diameter 11 1/4″. The inside depth of the box must exceed the mounting depth by at least 1″.
How much power does the Vibe Audio BlackAir 12 D2 (V4) handle and how do I wire it?
RMS power rating: 550 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 12 D2 (V4) better sealed or ported?
EBP 43: a sealed box (1.77 ft³) suits it best — tight bass in a compact enclosure. Ported is possible (1.48 ft³, tuned to 32 Hz) but larger.
What port does the Vibe Audio BlackAir 12 D2 (V4) need?
For the 1.48 ft³ ported box tuned to 32 Hz: slot 1 9/16 × 14 5/16″, 35 13/16″ long, area 22.6 in²; or a round port Ø5 3/8″, ≈ 35 13/16″ long. Port air speed at 550 W: 51 ft/s.
What box do two Vibe Audio BlackAir 12 D2 (V4) subs need?
Two subs need twice the volume: 3.53 ft³ sealed, or 2.97 ft³ ported at the same 32 Hz tuning with twice the port area. One shared chamber or one per sub — whatever fits your vehicle.