Zetta Audio M-12 450
12″ subwoofer · 4 Ω · 450 W RMS
The Zetta Audio M-12 450 is a 12″ subwoofer. With Qts 0.70 and EBP 40 it suits a sealed box: tight bass in a small enclosure; a ported box would need a lot of volume. 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, 450 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 · 0.93 |
|---|---|
| Fc | 41 Hz |
| F3 (−3 dB, no cabin gain) | 35 Hz |
| Example box (outside) | 31 1/2″ × 15 3/4″ × 9 1/16″ |
Ported
deeper, louder| Tuning (Fb) | 34 Hz |
|---|---|
| Port | slot 1 9/16 × 14 5/16″, 38 5/16″ long |
| Port velocity at 450 W | 44 ft/s |
| F3 (−3 dB, no cabin gain) | 32 Hz |
| Example box (outside) | 31 1/2″ × 15 3/4″ × 9 9/16″ |
Deeper: 3.04 ft³ (86 L) tuned to 29 Hz, 31 1/2″ × 15 3/4″ × 16 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 | 450 W |
| Fs | 31 Hz |
| Qts | 0.70 |
| Qes | 0.77 |
| Qms | 7.46 |
| Vas | 1.38 ft³ |
| Re | 3.9 Ω |
|---|---|
| Sd | 78.6 in² |
| Xmax | 0.46″ |
| Vd | 36.5 in³ calc. |
| Mms | 246 g calc. |
| BL | 15.6 T·m calc. |
| EBP | 40 — suits sealed calc. |
| Sensitivity, 1 W / 1 m | 83.8 dB calc. |
Mounting dimensions
| Cutout diameter | 10 7/8″ |
|---|---|
| Mounting depth | 5 1/2″ |
| 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
Other Zetta Audio 12″ models
- 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
- 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.
- Sky High Car Audio FE-12 D4 1.80 ft³ sealed · 1.27 ft³ ported
- Phoenix Gold SX112D4 (DVC 4 ohm) 1.80 ft³ sealed · 1.27 ft³ ported
- Kicker L7 12" 2-Ohm DVC (41L7122) 2.26 ft³ sealed · 2.51 ft³ ported
- DL Audio Piranha 12 V.2 (2+2) 1.73 ft³ sealed · 1.24 ft³ ported
- Timpano TPT-T1000-12 D4 1.73 ft³ sealed · 1.20 ft³ ported
- Ground Zero GZIW 12XSPL-D2 (2x2 Ohm) 1.73 ft³ sealed · 1.20 ft³ ported
All 12″ subwoofers in our database →
FAQ
What box does the Zetta Audio M-12 450 need?
Recommended net volume: 1.80 ft³ sealed, 1.24 ft³ ported tuned to 34 Hz — for one sub in a sedan at 450 W. Fit the box to your space and amp in the free calculator, with plans and a cut sheet.
What are the Zetta Audio M-12 450 Thiele/Small specs?
Fs 31 Hz, Qts 0.70, Vas 1.38 ft³, Xmax 0.46″, Sd 78.6 in².
What is the Zetta Audio M-12 450 mounting depth?
Mounting depth is 5 1/2″, 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 M-12 450 handle and how do I wire it?
RMS power rating: 450 W. Wiring for several subs and amp power — in the wiring calculator.
Is the Zetta Audio M-12 450 better sealed or ported?
EBP 40: a sealed box (1.80 ft³) suits it best — tight bass in a compact enclosure. Ported is possible (1.24 ft³, tuned to 34 Hz) but larger.
What port does the Zetta Audio M-12 450 need?
For the 1.24 ft³ ported box tuned to 34 Hz: slot 1 9/16 × 14 5/16″, 38 5/16″ long, area 22.6 in²; or a round port Ø5 3/8″, ≈ 38 5/16″ long. Port air speed at 450 W: 44 ft/s.
What box do two Zetta Audio M-12 450 subs need?
Two subs need twice the volume: 3.60 ft³ sealed, or 2.47 ft³ ported at the same 34 Hz tuning with twice the port area. One shared chamber or one per sub — whatever fits your vehicle.