Sky High Car Audio FEX-10 D2

10″ subwoofer · dual 2 Ω · 1,250 W RMS

33.8 HzFs, resonance

0.55Qts

0.57 ft³Vas

0.75″Xmax

1,250 WRMS

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

0.49 ft³ (14 L)

Net volume

Bass character (Qtc)	Tight and punchy · 0.80
Fc	50 Hz
F3 (−3 dB, no cabin gain)	47 Hz
Example box (outside)	12 3/16″ × 12 3/16″ × 9 11/16″

Open sealed box in designer

Ported

deeper, louder

0.81 ft³ (23 L)

Net volume

Tuning (Fb)	45 Hz
Port	2 round ports Ø2 1/2″, 14 3/8″ long
Port velocity at 1,250 W	201 ft/s
F3 (−3 dB, no cabin gain)	38 Hz
Example box (outside)	16 3/8″ × 15 3/4″ × 9 1/4″

At 1,250 W this example’s port will be noisy: air speed 201 ft/s, while the limit is 82 ft/s. It stays quiet up to about 200 W. Full power needs a port of at least 24.5 in², which means a bigger box than this example — size it in the designer.

Open ported box in designer

Deeper: 1.52 ft³ (43 L) tuned to 31 Hz, 29 7/16″ × 15 3/4″ × 9 1/4″ outside — a bigger box with flatter deep bass. Open in the calculator

Where to buy Amazon

Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Size	10″
Voice coils	dual 2 Ω
RMS power	1,250 W
Fs	33.8 Hz
Qts	0.55
Qes	0.6
Qms	6.02
Vas	0.57 ft³

Re (one coil)	2.09 Ω
Sd	51.2 in²
Xmax	0.75″
Vd	38.3 in³ calc.
Mms	211 g calc.
BL	12.5 T·m calc.
EBP	56 — sealed or ported calc.
Sensitivity, 1 W / 1 m	82.2 dB calc.

Mounting dimensions

Cutout diameter	9 1/16″
Mounting depth	6 3/4″
Overall diameter	10 1/4″

“≈” 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

skyhighcaraudio.com/sky-high-car-audio-fex-series-10-subwoofer/

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 FE-10 D2 10″ · dual 2 Ω
Sky High Car Audio FE-10 D4 10″ · dual 4 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.

Rockford Fosgate Power T1D210 0.49 ft³ sealed · 1.34 ft³ ported
B2 Audio IS10 D2 v3 0.49 ft³ sealed · 0.85 ft³ ported
Memphis Car Audio MJP1022 (MOJO Pro 10" DVC 2ohm) 0.60 ft³ sealed · 0.88 ft³ ported
Rockford Fosgate Power T1S1-10S (Slim, sealed) 0.71 ft³ sealed · 0.88 ft³ ported
Cerwin-Vega Mobile ST104D (Stroker 10" DVC 4ohm) 0.55 ft³ sealed · 1.02 ft³ ported
Diamond D910D2 0.57 ft³ sealed · 0.81 ft³ ported

FAQ

What box does the Sky High Car Audio FEX-10 D2 need?

Recommended net volume: 0.49 ft³ sealed, 0.81 ft³ ported tuned to 45 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-10 D2 Thiele/Small specs?

Fs 33.8 Hz, Qts 0.55, Vas 0.57 ft³, Xmax 0.75″, Sd 51.2 in².

What is the Sky High Car Audio FEX-10 D2 mounting depth?

Mounting depth is 6 3/4″, 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 FEX-10 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.