Sky High Car Audio FE-10 D4
10″ subwoofer · dual 4 Ω · 700 W RMS
The Sky High Car Audio FE-10 D4 is a 10″ subwoofer. With Qts 0.72 and EBP 47 it suits a sealed box: tight bass in a small enclosure; a ported box would need a lot of volume.
| 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, 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 · 0.89 |
|---|---|
| Fc | 47 Hz |
| F3 (−3 dB, no cabin gain) | 41 Hz |
| Example box (outside) | 12 3/16″ × 12 3/16″ × 17 1/16″ |
Ported
deeper, louder| Tuning (Fb) | 38 Hz |
|---|---|
| Port | slot 1 3/16 × 14 5/16″, 35 3/16″ long |
| Port velocity at 700 W | 73 ft/s |
| F3 (−3 dB, no cabin gain) | 33 Hz |
| Example box (outside) | 15 1/4″ × 15 3/4″ × 13 9/16″ |
Deeper: 1.98 ft³ (56 L) tuned to 28 Hz, 31 1/2″ × 15 3/4″ × 14 1/16″ 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 | 10″ |
|---|---|
| Voice coils | dual 4 Ω |
| RMS power | 700 W |
| Fs | 38.7 Hz |
| Qts | 0.72 |
| Qes | 0.83 |
| Qms | 5.72 |
| Vas | 0.49 ft³ |
| Re (one coil) | 3.25 Ω |
|---|---|
| Sd | 50.8 in² |
| Xmax | 0.59″ |
| Vd | 30 in³ calc. |
| Mms | 184 g calc. |
| BL | 13.2 T·m calc. |
| EBP | 47 — suits sealed calc. |
| Sensitivity, 1 W / 1 m | 81.9 dB calc. |
Mounting dimensions
| Cutout diameter | 9 1/16″ |
|---|---|
| Mounting depth | 6 7/16″ |
| Overall diameter | 10 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.
- F-150 SuperCrew — under the rear seat sealed and ported box
- Ram Crew Cab — under the rear seat sealed and ported box
- Tacoma Double Cab — under the rear seat sealed and ported box
- 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
- Tesla Model 3 — well under the trunk floor sealed and ported box
- Club Car Precedent — under the rear seat sealed and ported box
Cone area (Sd) calculated from Fs, Vas and Mms: 50.8 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
Voice coil versions
The same sub with different voice coils: the parameters are nearly the same — pick by your amp and wiring.
| Model | Voice coils | Re | Qes | Vas | Sealed | Ported |
|---|---|---|---|---|---|---|
| Sky High Car Audio FE-10 D2 | dual 2 Ω | 1.9 Ω | 0.78 | 0.50 ft³ | 0.99 ft³ | 0.81 ft³ · 38 Hz |
| Sky High Car Audio FE-10 D4 | dual 4 Ω | 3.25 Ω | 0.83 | 0.49 ft³ | 0.99 ft³ | 0.81 ft³ · 38 Hz |
Other Sky High Car Audio 10″ models
- Sky High Car Audio BMX-10 D1 10″ · dual 1 Ω
- Sky High Car Audio BMX-10 D2 10″ · dual 2 Ω
- Sky High Car Audio FEX-10 D2 10″ · dual 2 Ω
- Sky High Car Audio FEX-10 D4 10″ · dual 4 Ω
- Sky High Car Audio FXB-10 D2 10″ · dual 2 Ω
- Sky High Car Audio FXB-10 D4 10″ · dual 4 Ω
Similar 10″ subwoofers from other brands
Close in Fs, Qts and Vas — a box of similar volume will suit them.
- JL Audio 10TW3-D8 1.02 ft³ sealed · 0.60 ft³ ported
- Audison Voce II AV 10 D4 II (DVC 4+4 ohm) 1.06 ft³ sealed · 0.92 ft³ ported
- Ascendant Audio Arsenal 10 D2 0.95 ft³ sealed · 0.78 ft³ ported
- Ascendant Audio Arsenal 10 D1 0.95 ft³ sealed · 0.78 ft³ ported
- Skar Audio VS-10 D4 1.09 ft³ sealed · 1.62 ft³ ported
- DL Audio Phoenix Bass Machine 10 (2+2) 0.92 ft³ sealed · 0.85 ft³ ported
FAQ
What box does the Sky High Car Audio FE-10 D4 need?
Recommended net volume: 0.99 ft³ sealed, 0.81 ft³ ported tuned to 38 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 Sky High Car Audio FE-10 D4 Thiele/Small specs?
Fs 38.7 Hz, Qts 0.72, Vas 0.49 ft³, Xmax 0.59″, Sd 50.8 in².
What is the Sky High Car Audio FE-10 D4 mounting depth?
Mounting depth is 6 7/16″, cutout diameter 9 1/16″. The inside depth of the box must exceed the mounting depth by at least 1″.
How much power does the Sky High Car Audio FE-10 D4 handle and how do I wire it?
RMS power rating: 700 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 Sky High Car Audio FE-10 D4 better sealed or ported?
EBP 47: a sealed box (0.99 ft³) suits it best — tight bass in a compact enclosure. Ported is possible (0.81 ft³, tuned to 38 Hz) but larger.
What port does the Sky High Car Audio FE-10 D4 need?
For the 0.81 ft³ ported box tuned to 38 Hz: slot 1 3/16 × 14 5/16″, 35 3/16″ long, area 16.9 in²; or a round port Ø4 5/8″, ≈ 35 3/16″ long. Port air speed at 700 W: 73 ft/s.
What box do two Sky High Car Audio FE-10 D4 subs need?
Two subs need twice the volume: 1.98 ft³ sealed, or 1.62 ft³ ported at the same 38 Hz tuning with twice the port area. One shared chamber or one per sub — whatever fits your vehicle.