Fi Audio Xv5 10 D2

10″ subwoofer · dual 2 Ω · 1,500 W RMS

37.1 HzFs, resonance

0.38Qts

0.27 ft³Vas

0.91″Xmax

1,500 WRMS

Source	ficaraudio.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, 1,500 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)	Dry and tight · 0.48
Fc	46 Hz
F3 (−3 dB, no cabin gain)	78 Hz
Example box (outside)	12 5/8″ × 12 5/8″ × 9 1/8″

Open sealed box in designer

Ported

deeper, louder

1.48 ft³ (42 L)

Net volume

Tuning (Fb)	38 Hz
Port	slot 2 3/4 × 14 5/16″, 44 1/8″ long
Port velocity at 1,500 W	74 ft/s
F3 (−3 dB, no cabin gain)	33 Hz
Example box (outside)	31 1/2″ × 15 3/4″ × 12 7/16″

Open ported box in designer

Deeper: 0.95 ft³ (27 L) tuned to 33 Hz, 19 1/16″ × 15 3/4″ × 9 1/16″ 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	1,500 W
Fs	37.1 Hz
Qts	0.38
Qes	0.417
Qms	4.99
Vas	0.27 ft³

Re (one coil)	1.84 Ω
Sd	50.3 in²
Xmax	0.91″
Vd	45.5 in³ calc.
Mms	360 g calc.
BL	19.2 T·m calc.
EBP	89 — sealed or ported calc.
Sensitivity, 1 W / 1 m	81.7 dB calc.

Mounting dimensions

Cutout diameter	9 5/16″
Mounting depth	6 9/16″
Overall diameter	11″

Judging by its value, the published Re is for both coils in series — converted to per coil.

“≈” 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

ficaraudio.com/xv5-series-10/

Other Fi Audio 10″ models

Fi Audio Alpha v1 10 S1 10″ · 1 Ω
Fi Audio Alpha v1 10 S2 10″ · 2 Ω
Fi Audio Alpha v1 10 S4 10″ · 4 Ω
Fi Audio Alpha v2 10 S2 10″ · 2 Ω
Fi Audio Alpha v2 10 S4 10″ · 4 Ω
Fi Audio Alpha v2.1 10 S2 10″ · 2 Ω
Fi Audio Alpha v2.1 10 S4 10″ · 4 Ω
Fi Audio BL-NEO 10 D1 10″ · dual 1 Ω
Fi Audio BL-NEO 10 D2 10″ · dual 2 Ω
Fi Audio BL10 D1 10″ · dual 1 Ω
Fi Audio BL10 D2 10″ · dual 2 Ω
Fi Audio BL10v3 D1 10″ · dual 1 Ω

Similar 10″ subwoofers from other brands

Close in Fs, Qts and Vas — a box of similar volume will suit them.

Sundown Audio Xv4-10 D2 0.87 ft³ sealed · 1.52 ft³ ported
Sundown Audio Zv6-10 D1 0.94 ft³ sealed · 1.52 ft³ ported
Sundown Audio SAv3-10 D4 0.60 ft³ sealed · 1.02 ft³ ported
Sundown Audio Zv6-10 D2 0.94 ft³ sealed · 1.52 ft³ ported
CT Sounds MESO-10 D4 0.55 ft³ sealed · 0.74 ft³ ported
Sundown Audio SAv3-10 D2 0.60 ft³ sealed · 1.02 ft³ ported

FAQ

What box does the Fi Audio Xv5 10 D2 need?

Recommended net volume: 0.49 ft³ sealed, 1.48 ft³ ported tuned to 38 Hz — for one sub in a sedan at 1,500 W. Fit the box to your space and amp in the free calculator, with plans and a cut sheet.

What are the Fi Audio Xv5 10 D2 Thiele/Small specs?

Fs 37.1 Hz, Qts 0.38, Vas 0.27 ft³, Xmax 0.91″, Sd 50.3 in².

What is the Fi Audio Xv5 10 D2 mounting depth?

Mounting depth is 6 9/16″, cutout diameter 9 5/16″. The inside depth of the box must exceed the mounting depth by at least 1″.

How much power does the Fi Audio Xv5 10 D2 handle and how do I wire it?

RMS power rating: 1,500 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.