Zetta Audio V-12 950 (4+4 Ohm)
12″ subwoofer · dual 4 Ω · 950 W RMS · also as V-12 950 (4 Ohm) (4 Ω)
The Zetta Audio V-12 950 (4+4 Ohm) is a 12″ subwoofer. With Qts 0.56 and EBP 49 it suits a sealed box: tight bass in a small enclosure; a ported box would need a lot of volume.
| Source | zettaaudio.com.br · 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 |
Recommended box
For a sedan, one sub, 950 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 | 42 Hz |
| F3 (−3 dB, no cabin gain) | 40 Hz |
| Example box (outside) | 14 9/16″ × 14 9/16″ × 14 13/16″ |
Ported
deeper, louder| Tuning (Fb) | 33 Hz |
|---|---|
| Port | slot 1 9/16 × 14 5/16″, 39 5/8″ long |
| Port velocity at 950 W | 73 ft/s |
| F3 (−3 dB, no cabin gain) | 30 Hz |
| Example box (outside) | 31 1/2″ × 15 3/4″ × 9 13/16″ |
Deeper: 3.11 ft³ (88 L) tuned to 25 Hz, 31 1/2″ × 15 3/4″ × 20 1/2″ 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 4 Ω |
| RMS power | 950 W |
| Fs | 30 Hz |
| Qts | 0.56 |
| Qes | 0.607 |
| Qms | 8.1 |
| Vas | 1.24 ft³ |
| Re (one coil) | 3.65 Ω |
|---|---|
| Sd | 79.8 in² |
| Xmax | 0.67″ |
| Vd | 53.4 in³ calc. |
| Mms | 302 g calc. |
| BL | 18.5 T·m calc. |
| EBP | 49 — suits sealed calc. |
| Sensitivity, 1 W / 1 m | 83.9 dB calc. |
Mounting dimensions
| Cutout diameter | 11 1/4″ |
|---|---|
| Mounting depth | 6 5/16″ |
| 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
“≈” 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
- zettaaudio.com.br/wp-content/uploads/2026/08/Manual-V-12-950-4-e-44.pdf
- zettaaudio.com.br/suporte/manuais/
Voice coil versions
The same sub with different voice coils: the parameters are nearly the same — pick by your amp and wiring.
| Model | Voice coils | Re | Qes | Vas | Sealed | Ported |
|---|---|---|---|---|---|---|
| Zetta Audio V-12 950 (4 Ohm) | 4 Ω | 3.15 Ω | 0.471 | 1.29 ft³ | 0.74 ft³ | 1.27 ft³ · 34 Hz |
| Zetta Audio V-12 950 (4+4 Ohm) | dual 4 Ω | 3.65 Ω | 0.607 | 1.24 ft³ | 1.24 ft³ | 1.27 ft³ · 33 Hz |
Other Zetta Audio 12″ models
- Zetta Audio M-12 450 12″ · 4 Ω
- Zetta Audio S-12 700 (4 Ohm) 12″ · 4 Ω
- Zetta Audio V-12 EVO 1100 12″ · dual 4 Ω
- Zetta Audio V-12 EVO 1200 12″ · dual 4 Ω
- Zetta Audio X-12 1500 12″ · dual 4 Ω
- Zetta Audio X-12 EVO 1600 12″ · dual 4 Ω
- Zetta Audio X-12 EVO 1800 12″ · dual 4 Ω
Similar 12″ subwoofers from other brands
Close in Fs, Qts and Vas — a box of similar volume will suit them.
- Swat GLK-P12D1 1.13 ft³ sealed · 1.20 ft³ ported
- CT Sounds OZONE-12 D2 1.27 ft³ sealed · 1.17 ft³ ported
- AMP MASS 500 12D2 1.48 ft³ sealed · 1.17 ft³ ported
- Swat GLK-12D1 1.13 ft³ sealed · 1.20 ft³ ported
- DD Audio SL712 D2 1.31 ft³ sealed · 1.38 ft³ ported
- DD Audio SL712 D4 1.31 ft³ sealed · 1.38 ft³ ported
All 12″ subwoofers in our database →
FAQ
What box does the Zetta Audio V-12 950 (4+4 Ohm) need?
Recommended net volume: 1.24 ft³ sealed, 1.27 ft³ ported tuned to 33 Hz — for one sub in a sedan at 950 W. Fit the box to your space and amp in the free calculator, with plans and a cut sheet.
What are the Zetta Audio V-12 950 (4+4 Ohm) Thiele/Small specs?
Fs 30 Hz, Qts 0.56, Vas 1.24 ft³, Xmax 0.67″, Sd 79.8 in².
What is the Zetta Audio V-12 950 (4+4 Ohm) mounting depth?
Mounting depth is 6 5/16″, 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 Zetta Audio V-12 950 (4+4 Ohm) handle and how do I wire it?
RMS power rating: 950 W. Dual 4 Ω voice coils: series gives 8 Ω, parallel gives 2 Ω at the amp. Wiring for several subs and amp power — in the wiring calculator.
Is the Zetta Audio V-12 950 (4+4 Ohm) better sealed or ported?
EBP 49: a sealed box (1.24 ft³) suits it best — tight bass in a compact enclosure. Ported is possible (1.27 ft³, tuned to 33 Hz) but larger.
What port does the Zetta Audio V-12 950 (4+4 Ohm) need?
For the 1.27 ft³ ported box tuned to 33 Hz: slot 1 9/16 × 14 5/16″, 39 5/8″ long, area 22.6 in²; or a round port Ø5 3/8″, ≈ 39 5/8″ long. Port air speed at 950 W: 73 ft/s.
What box do two Zetta Audio V-12 950 (4+4 Ohm) subs need?
Two subs need twice the volume: 2.47 ft³ sealed, or 2.54 ft³ ported at the same 33 Hz tuning with twice the port area. One shared chamber or one per sub — whatever fits your vehicle.