Sky High Car Audio FXB-10 D2

10″ subwoofer · dual 2 Ω · 1,000 W RMS

36.4 HzFs, resonance

0.64Qts

0.28 ft³Vas

1.18″Xmax

1,000 WRMS

The Sky High Car Audio FXB-10 D2 is a 10″ subwoofer. With Qts 0.64 and EBP 52 it works both sealed and ported: sealed is tighter and smaller, ported is deeper and louder. Long excursion (Xmax 1.18″) — built for loud music and high power.

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, 1,000 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

0.51 ft³ (14.5 L)

Net volume

Bass character (Qtc)	Tight and punchy · 0.79
Fc	45 Hz
F3 (−3 dB, no cabin gain)	42 Hz
Example box (outside)	12 5/8″ × 12 5/8″ × 9 3/8″

Open sealed box in designer

Ported

deeper, louder

0.81 ft³ (23 L)

Net volume

Tuning (Fb)	38 Hz
Port	slot 1 15/16 × 14 5/16″, 59 15/16″ long
Port velocity at 1,000 W	62 ft/s
F3 (−3 dB, no cabin gain)	31 Hz
Example box (outside)	31 1/2″ × 15 3/4″ × 9 11/16″

The volume and tuning are the recommendation, but the port doesn’t fit this example box. Size the box and port in the designer.

Open ported box in designer

Deeper: 1.13 ft³ (32 L) tuned to 34 Hz, 21 9/16″ × 15 3/4″ × 9 7/16″ 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	1,000 W
Fs	36.4 Hz
Qts	0.64
Qes	0.7
Qms	7.33
Vas	0.28 ft³

Re (one coil)	1.9 Ω
Sd	50.9 in²
Xmax	1.18″
Vd	60.1 in³ calc.
Mms	375 g calc.
BL	15.3 T·m calc.
EBP	52 — sealed or ported calc.
Sensitivity, 1 W / 1 m	79.3 dB calc.

Mounting dimensions

Cutout diameter	9 1/4″
Mounting depth	6 15/16″
Overall diameter	10 9/16″

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
Spare tire well sealed box
Polaris RZR / Ranger — under the seat sealed box
Can-Am — under the seat sealed 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: 50.9 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

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

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 FXB-10 D2	dual 2 Ω	1.9 Ω	0.7	0.28 ft³	0.51 ft³	0.81 ft³ · 38 Hz
Sky High Car Audio FXB-10 D4	dual 4 Ω	3.2 Ω	0.77	0.29 ft³	0.60 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 FE-10 D2 10″ · dual 2 Ω
Sky High Car Audio FE-10 D4 10″ · dual 4 Ω
Sky High Car Audio FEX-10 D2 10″ · dual 2 Ω
Sky High Car Audio FEX-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.

Sundown Audio M10 D2 0.79 ft³ sealed · 0.92 ft³ ported
Sundown Audio M10 D1 0.79 ft³ sealed · 0.92 ft³ ported
American Bass XR-1022 0.49 ft³ sealed · 1.38 ft³ ported
CT Sounds STRATO-10 D2 0.51 ft³ sealed · 0.74 ft³ ported
American Bass XR-1044 0.49 ft³ sealed · 1.38 ft³ ported
Skar Audio SDR-10 D4 0.53 ft³ sealed · 1.66 ft³ ported

FAQ

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

Recommended net volume: 0.51 ft³ sealed, 0.81 ft³ ported tuned to 38 Hz — for one sub in a sedan at 1,000 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 FXB-10 D2 Thiele/Small specs?

Fs 36.4 Hz, Qts 0.64, Vas 0.28 ft³, Xmax 1.18″, Sd 50.9 in².

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

Mounting depth is 6 15/16″, cutout diameter 9 1/4″. The inside depth of the box must exceed the mounting depth by at least 1″.

How much power does the Sky High Car Audio FXB-10 D2 handle and how do I wire it?

RMS power rating: 1,000 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 Sky High Car Audio FXB-10 D2 better sealed or ported?

EBP 52: both work — sealed 0.51 ft³ is tighter and smaller, ported 0.81 ft³ tuned to 38 Hz is deeper and louder.

What port does the Sky High Car Audio FXB-10 D2 need?

For the 0.81 ft³ ported box tuned to 38 Hz: slot 1 15/16 × 14 5/16″, 59 15/16″ long, area 28.2 in²; or a round port Ø6″, ≈ 59 15/16″ long. Port air speed at 1,000 W: 62 ft/s.

What box do two Sky High Car Audio FXB-10 D2 subs need?

Two subs need twice the volume: 1.02 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.