Zetta Audio X-12 EVO 1800
12″ subwoofer · dual 4 Ω · 1,800 W RMS
The Zetta Audio X-12 EVO 1800 is a 12″ subwoofer. With Qts 0.39 and EBP 76 it works both sealed and ported: sealed is tighter and smaller, ported is deeper and louder.
| 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, 1,800 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) | Dry and tight · 0.60 |
|---|---|
| Fc | 48 Hz |
| F3 (−3 dB, no cabin gain) | 60 Hz |
| Example box (outside) | 14 9/16″ × 14 9/16″ × 9 7/8″ |
Ported
deeper, louder| Tuning (Fb) | 34 Hz |
|---|---|
| Port | slot 4 1/8 × 14 5/16″, 53 5/16″ long |
| Port velocity at 1,800 W | 66 ft/s |
| F3 (−3 dB, no cabin gain) | 30 Hz |
| Example box (outside) | 31 1/2″ × 15 3/4″ × 19 5/16″ |
Deeper: 1.48 ft³ (42 L) tuned to 30 Hz, 22 13/16″ × 15 3/4″ × 14 9/16″ 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 | 12″ |
|---|---|
| Voice coils | dual 4 Ω |
| RMS power | 1,800 W |
| Fs | 31.5 Hz |
| Qts | 0.39 |
| Qes | 0.414 |
| Qms | 8.16 |
| Vas | 1.01 ft³ |
| Re (one coil) | 3.5 Ω |
|---|---|
| Sd | 77.3 in² |
| Xmax | 0.74″ |
| Vd | 57.2 in³ calc. |
| Mms | 316 g calc. |
| BL | 23 T·m calc. |
| EBP | 76 — sealed or ported calc. |
| Sensitivity, 1 W / 1 m | 85.3 dB calc. |
Mounting dimensions
| Cutout diameter | 11 7/16″ |
|---|---|
| Mounting depth | 7 7/16″ |
| Overall diameter | 12 9/16″ |
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 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 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/2026/09/Manual-X-12-EVO-1.800.pdf
- zettaaudio.com.br/suporte/manuais/
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-12 950 (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
Similar 12″ subwoofers from other brands
Close in Fs, Qts and Vas — a box of similar volume will suit them.
- Kicx ZT-12 (2+2) 0.64 ft³ sealed · 1.94 ft³ ported
- Kicx ZT-12V2 (2+2) 0.64 ft³ sealed · 1.94 ft³ ported
- Deaf Bonce Apocalypse DB-3512R D1 0.90 ft³ sealed · 2.26 ft³ ported
- Fi Audio Q12 D2 0.67 ft³ sealed · 2.19 ft³ ported
- Deaf Bonce Apocalypse DB-3512R D2 0.90 ft³ sealed · 1.20 ft³ ported
- Deaf Bonce Apocalypse DB-3012R D1 0.83 ft³ sealed · 1.20 ft³ ported
All 12″ subwoofers in our database →
FAQ
What box does the Zetta Audio X-12 EVO 1800 need?
Recommended net volume: 0.74 ft³ sealed, 2.30 ft³ ported tuned to 34 Hz — for one sub in a sedan at 1,800 W. Fit the box to your space and amp in the free calculator, with plans and a cut sheet.
What are the Zetta Audio X-12 EVO 1800 Thiele/Small specs?
Fs 31.5 Hz, Qts 0.39, Vas 1.01 ft³, Xmax 0.74″, Sd 77.3 in².
What is the Zetta Audio X-12 EVO 1800 mounting depth?
Mounting depth is 7 7/16″, cutout diameter 11 7/16″. The inside depth of the box must exceed the mounting depth by at least 1″.
How much power does the Zetta Audio X-12 EVO 1800 handle and how do I wire it?
RMS power rating: 1,800 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 X-12 EVO 1800 better sealed or ported?
EBP 76: both work — sealed 0.74 ft³ is tighter and smaller, ported 2.30 ft³ tuned to 34 Hz is deeper and louder.
What port does the Zetta Audio X-12 EVO 1800 need?
For the 2.30 ft³ ported box tuned to 34 Hz: slot 4 1/8 × 14 5/16″, 53 5/16″ long, area 59.2 in²; or a round port Ø8 11/16″, ≈ 53 5/16″ long. Port air speed at 1,800 W: 66 ft/s.
What box do two Zetta Audio X-12 EVO 1800 subs need?
Two subs need twice the volume: 1.48 ft³ sealed, or 4.59 ft³ ported at the same 34 Hz tuning with twice the port area. One shared chamber or one per sub — whatever fits your vehicle.