Sky High Car Audio FEX-12 D2
12″ subwoofer · dual 2 Ω · 1,250 W RMS
| Source | skyhighcaraudio.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, 1,250 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 · 0.90 |
|---|---|
| Fc | 46 Hz |
| F3 (−3 dB, no cabin gain) | 40 Hz |
| Example box (outside) | 14 3/16″ × 14 3/16″ × 21 11/16″ |
Ported
deeper, louder| Tuning (Fb) | 34 Hz |
|---|---|
| Port | slot 1 9/16 × 14 5/16″, 37 1/8″ long |
| Port velocity at 1,250 W | 75 ft/s |
| F3 (−3 dB, no cabin gain) | 34 Hz |
| Example box (outside) | 20 11/16″ × 15 3/4″ × 14 3/16″ |
Deeper: 3.07 ft³ (87 L) tuned to 31 Hz, 31 1/2″ × 15 3/4″ × 19 5/8″ 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 | dual 2 Ω |
| RMS power | 1,250 W |
| Fs | 34.6 Hz |
| Qts | 0.67 |
| Qes | 0.739 |
| Qms | 7.18 |
| Vas | 1.42 ft³ |
| Re (one coil) | 2.12 Ω |
|---|---|
| Sd | 79.2 in² |
| Xmax | 0.75″ |
| Vd | 59.2 in³ calc. |
| Mms | 195 g calc. |
| BL | 11 T·m calc. |
| EBP | 47 — suits sealed calc. |
| Sensitivity, 1 W / 1 m | 85.5 dB calc. |
Mounting dimensions
| Cutout diameter | 10 7/8″ |
|---|---|
| Mounting depth | 7 1/16″ |
| Overall diameter | 12 3/8″ |
“≈” 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 Sky High Car Audio 12″ models
- Sky High Car Audio BMX-12 D1 12″ · dual 1 Ω
- Sky High Car Audio BMX-12 D2 12″ · dual 2 Ω
- Sky High Car Audio FE-12 D2 12″ · dual 2 Ω
- Sky High Car Audio FE-12 D4 12″ · dual 4 Ω
- Sky High Car Audio FEX-12 D4 12″ · dual 4 Ω
- Sky High Car Audio FMX-12 D1 12″ · dual 1 Ω
- Sky High Car Audio FMX-12 D2 12″ · dual 2 Ω
- Sky High Car Audio FXB-12 D2 12″ · dual 2 Ω
- Sky High Car Audio FXB-12 D4 12″ · dual 4 Ω
- Sky High Car Audio FXXL-12 D1 12″ · dual 1 Ω
- Sky High Car Audio FXXL-12 D2 12″ · dual 2 Ω
Similar 12″ subwoofers from other brands
Close in Fs, Qts and Vas — a box of similar volume will suit them.
- Deaf Bonce Hannibal HSS-3212 D2 1.73 ft³ sealed · 1.20 ft³ ported
- Swat MAS-12 1.73 ft³ sealed · 1.20 ft³ ported
- Kicker L7 12" 2-Ohm DVC (41L7122) 2.26 ft³ sealed · 2.51 ft³ ported
- Rockford Fosgate Punch P3SD2-12 (Shallow) 1.77 ft³ sealed · 1.13 ft³ ported
- Quantum Audio QWX2000/12D4 1.80 ft³ sealed · 1.27 ft³ ported
- MTX Audio 5512-22 1.98 ft³ sealed · 1.80 ft³ ported
FAQ
What box does the Sky High Car Audio FEX-12 D2 need?
Recommended net volume: 1.80 ft³ sealed, 1.27 ft³ ported tuned to 34 Hz — for one sub in a sedan at 1,250 W. Fit the box to your space and amp in the free calculator, with plans and a cut sheet.
What are the Sky High Car Audio FEX-12 D2 Thiele/Small specs?
Fs 34.6 Hz, Qts 0.67, Vas 1.42 ft³, Xmax 0.75″, Sd 79.2 in².
What is the Sky High Car Audio FEX-12 D2 mounting depth?
Mounting depth is 7 1/16″, 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 Sky High Car Audio FEX-12 D2 handle and how do I wire it?
RMS power rating: 1,250 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.