Ground Zero GZUW 12SQ-D2 (2x2 Ohm)
12″ subwoofer · dual 2 Ω · 600 W RMS
The Ground Zero GZUW 12SQ-D2 (2x2 Ohm) is a 12″ subwoofer. With Qts 0.67 and EBP 57 it works both sealed and ported: sealed is tighter and smaller, ported is deeper and louder.
| Source | ground-zero-audio.com · 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, 600 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 · 0.88 |
|---|---|
| Fc | 53 Hz |
| F3 (−3 dB, no cabin gain) | 46 Hz |
| Example box (outside) | 31 1/2″ × 15 3/4″ × 9 3/8″ |
Ported
deeper, louder| Tuning (Fb) | 34 Hz |
|---|---|
| Port | slot 1 9/16 × 14 5/16″, 36″ long |
| Port velocity at 600 W | 54 ft/s |
| F3 (−3 dB, no cabin gain) | 38 Hz |
| Example box (outside) | 31 1/2″ × 15 3/4″ × 9 11/16″ |
Deeper: 3.18 ft³ (90 L) tuned to 35 Hz, 31 1/2″ × 15 3/4″ × 16 15/16″ 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 2 Ω |
| RMS power | 600 W |
| Fs | 39.8 Hz |
| Qts | 0.67 |
| Qes | 0.7 |
| Qms | 14.38 |
| Vas | 1.39 ft³ |
| Re (one coil) | 2.02 Ω |
|---|---|
| Sd | 81.6 in² |
| Xmax | 0.79″ |
| Vd | 64.3 in³ calc. |
| Mms | 159 g calc. |
| BL | 10.7 T·m calc. |
| EBP | 57 — sealed or ported calc. |
| Sensitivity, 1 W / 1 m | 87.5 dB calc. |
Mounting dimensions
| Cutout diameter | 11 3/16″ |
|---|---|
| Mounting depth | 6 3/16″ |
| Overall diameter | 12 3/8″ |
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
Cone area (Sd) calculated from Fs, Vas and Mms: 81.6 in².
“≈” 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
- ground-zero-audio.com/en/gzuw-12sq-d2-2/
- ground-zero-audio.com/wp-content/uploads/GZUW-12SQ-D2_OM_AWV2.11.pdf
Other Ground Zero 12″ models
- Ground Zero GZHW 12SPL (2x2 Ohm) 12″ · dual 2 Ω
- Ground Zero GZHW 12SPL-D2 FLAT (2x2 Ohm) 12″ · dual 2 Ω
- Ground Zero GZHW 12XSPL-D1 (2x1 Ohm) 12″ · dual 1 Ω
- Ground Zero GZHW 30-D1 (2x1 Ohm) 12″ · dual 1 Ω
- Ground Zero GZHW 30-D2 (2x2 Ohm) 12″ · dual 2 Ω
- Ground Zero GZHW 30SPL (2x1 Ohm) 12″ · dual 1 Ω
- Ground Zero GZHW 30X (2x2 Ohm) 12″ · dual 2 Ω
- Ground Zero GZHW 30XSPL-D1 (2x1 Ohm) 12″ · dual 1 Ω
- Ground Zero GZHW 30XSPL-D2 (2x2 Ohm) 12″ · dual 2 Ω
- Ground Zero GZIW 12SPL (2x2 Ohm) 12″ · dual 2 Ω
- Ground Zero GZIW 12XSPL-D2 (2x2 Ohm) 12″ · dual 2 Ω
- Ground Zero GZIW 300 (4 Ohm) 12″ · 4 Ω
Similar 12″ subwoofers from other brands
Close in Fs, Qts and Vas — a box of similar volume will suit them.
- Rockville W12K5S2 1.73 ft³ sealed · 1.66 ft³ ported
- Vibe Audio Pulse 12 (PULSE12-V0) 1.73 ft³ sealed · 1.20 ft³ ported
- Vibe Audio Pulse 12 D2 (PULSE12D2-V3) 1.73 ft³ sealed · 1.20 ft³ ported
- Machete M12 Super Sport D2 1.73 ft³ sealed · 1.20 ft³ ported
- Swat MAS-12 1.73 ft³ sealed · 1.20 ft³ ported
- DD Audio 212e D4 1.73 ft³ sealed · 1.20 ft³ ported
- Bomber Outdoor 500W 4 Ohm (SW12OUT-500-4) 1.84 ft³ sealed · 1.31 ft³ ported
All 12″ subwoofers in our database →
FAQ
What box does the Ground Zero GZUW 12SQ-D2 (2x2 Ohm) need?
Recommended net volume: 1.87 ft³ sealed, 1.31 ft³ ported tuned to 34 Hz — for one sub in a sedan at 600 W. Fit the box to your space and amp in the free calculator, with plans and a cut sheet.
What are the Ground Zero GZUW 12SQ-D2 (2x2 Ohm) Thiele/Small specs?
Fs 39.8 Hz, Qts 0.67, Vas 1.39 ft³, Xmax 0.79″, Sd 81.6 in².
What is the Ground Zero GZUW 12SQ-D2 (2x2 Ohm) mounting depth?
Mounting depth is 6 3/16″, cutout diameter 11 3/16″. The inside depth of the box must exceed the mounting depth by at least 1″.
How much power does the Ground Zero GZUW 12SQ-D2 (2x2 Ohm) handle and how do I wire it?
RMS power rating: 600 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 Ground Zero GZUW 12SQ-D2 (2x2 Ohm) better sealed or ported?
EBP 57: both work — sealed 1.87 ft³ is tighter and smaller, ported 1.31 ft³ tuned to 34 Hz is deeper and louder.
What port does the Ground Zero GZUW 12SQ-D2 (2x2 Ohm) need?
For the 1.31 ft³ ported box tuned to 34 Hz: slot 1 9/16 × 14 5/16″, 36″ long, area 22.6 in²; or a round port Ø5 3/8″, ≈ 36″ long. Port air speed at 600 W: 54 ft/s.
What box do two Ground Zero GZUW 12SQ-D2 (2x2 Ohm) subs need?
Two subs need twice the volume: 3.74 ft³ sealed, or 2.61 ft³ ported at the same 34 Hz tuning with twice the port area. One shared chamber or one per sub — whatever fits your vehicle.