Zetta Audio S-12 700 (4 Ohm)
12″ subwoofer · 4 Ω · 700 W RMS
The Zetta Audio S-12 700 (4 Ohm) is a 12″ subwoofer. With Qts 0.51 and EBP 59 it works both sealed and ported: sealed is tighter and smaller, ported is deeper and louder. Modest excursion (Xmax 0.46″) — for clean sound at moderate levels, not for SPL competitions.
| 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, 700 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 | 51 Hz |
| F3 (−3 dB, no cabin gain) | 49 Hz |
| Example box (outside) | 14 3/16″ × 14 3/16″ × 11 15/16″ |
Ported
deeper, louder| Tuning (Fb) | 34 Hz |
|---|---|
| Port | slot 1 9/16 × 14 5/16″, 39 9/16″ long |
| Port velocity at 700 W | 61 ft/s |
| F3 (−3 dB, no cabin gain) | 33 Hz |
| Example box (outside) | 31 1/2″ × 15 3/4″ × 9 1/2″ |
Deeper: 2.75 ft³ (78 L) tuned to 28 Hz, 31 1/2″ × 15 3/4″ × 17 1/8″ 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 | 12″ |
|---|---|
| Voice coils | 4 Ω |
| RMS power | 700 W |
| Fs | 33 Hz |
| Qts | 0.51 |
| Qes | 0.555 |
| Qms | 6.6 |
| Vas | 1.25 ft³ |
| Re | 3.6 Ω |
|---|---|
| Sd | 76.1 in² |
| Xmax | 0.46″ |
| Vd | 35.4 in³ calc. |
| Mms | 224 g calc. |
| BL | 17.3 T·m calc. |
| EBP | 59 — sealed or ported calc. |
| Sensitivity, 1 W / 1 m | 85.6 dB calc. |
Mounting dimensions
| Cutout diameter | 10 7/8″ |
|---|---|
| Mounting depth | 5 5/8″ |
| Overall diameter | 12 1/4″ |
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/2026/05/Manual-S-12-700-1.pdf
- zettaaudio.com.br/suporte/manuais/
Other Zetta Audio 12″ models
- Zetta Audio M-12 450 12″ · 4 Ω
- Zetta Audio V-12 950 (4 Ohm) 12″ · 4 Ω
- Zetta Audio V-12 950 (4+4 Ohm) 12″ · dual 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.
- Diamond M6mkII 12D4 0.81 ft³ sealed · 1.20 ft³ ported
- JL Audio 12TW1-4 0.92 ft³ sealed · 1.13 ft³ ported
- Diamond D612D4 0.78 ft³ sealed · 1.20 ft³ ported
- Rockford Fosgate Power T112D4 (2004) 1.13 ft³ sealed · 1.13 ft³ ported
- Skar Audio SDR-12 D2 1.02 ft³ sealed · 1.87 ft³ ported
- Machete M12 D1 Sport 0.95 ft³ sealed · 1.20 ft³ ported
All 12″ subwoofers in our database →
FAQ
What box does the Zetta Audio S-12 700 (4 Ohm) need?
Recommended net volume: 0.88 ft³ sealed, 1.20 ft³ ported tuned to 34 Hz — for one sub in a sedan at 700 W. Fit the box to your space and amp in the free calculator, with plans and a cut sheet.
What are the Zetta Audio S-12 700 (4 Ohm) Thiele/Small specs?
Fs 33 Hz, Qts 0.51, Vas 1.25 ft³, Xmax 0.46″, Sd 76.1 in².
What is the Zetta Audio S-12 700 (4 Ohm) mounting depth?
Mounting depth is 5 5/8″, cutout diameter 10 7/8″. The inside depth of the box must exceed the mounting depth by at least 1″.
How much power does the Zetta Audio S-12 700 (4 Ohm) handle and how do I wire it?
RMS power rating: 700 W. Wiring for several subs and amp power — in the wiring calculator.
Is the Zetta Audio S-12 700 (4 Ohm) better sealed or ported?
EBP 59: both work — sealed 0.88 ft³ is tighter and smaller, ported 1.20 ft³ tuned to 34 Hz is deeper and louder.
What port does the Zetta Audio S-12 700 (4 Ohm) need?
For the 1.20 ft³ ported box tuned to 34 Hz: slot 1 9/16 × 14 5/16″, 39 9/16″ long, area 22.6 in²; or a round port Ø5 3/8″, ≈ 39 9/16″ long. Port air speed at 700 W: 61 ft/s.
What box do two Zetta Audio S-12 700 (4 Ohm) subs need?
Two subs need twice the volume: 1.77 ft³ sealed, or 2.40 ft³ ported at the same 34 Hz tuning with twice the port area. One shared chamber or one per sub — whatever fits your vehicle.