Fi Audio Xv5 10 D1

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

39.2 HzFs, resonance

0.41Qts

0.29 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 · 0.52
Fc	50 Hz
F3 (−3 dB, no cabin gain)	74 Hz
Example box (outside)	12 5/8″ × 12 5/8″ × 9 1/8″

Open sealed box in designer

Ported

deeper, louder

0.81 ft³ (23 L)

Net volume

Tuning (Fb)	46 Hz
Port	2 round ports Ø2 1/2″, 13 11/16″ long
Port velocity at 1,500 W	242 ft/s
F3 (−3 dB, no cabin gain)	39 Hz
Example box (outside)	16 5/8″ × 15 3/4″ × 9 1/16″

At 1,500 W this example’s port will be noisy: air speed 242 ft/s, while the limit is 82 ft/s. It stays quiet up to about 170 W. Full power needs a port of at least 29.4 in², which means a bigger box than this example — size it in the designer.

Open ported box in designer

Deeper: 0.95 ft³ (27 L) tuned to 32 Hz, 19 1/8″ × 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 1 Ω
RMS power	1,500 W
Fs	39.2 Hz
Qts	0.41
Qes	0.457
Qms	4.42
Vas	0.29 ft³

Re (one coil)	0.98 Ω
Sd	50.3 in²
Xmax	0.91″
Vd	45.5 in³ calc.
Mms	295 g calc.
BL	12.5 T·m calc.
EBP	86 — sealed or ported calc.
Sensitivity, 1 W / 1 m	82.4 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 Zv6-10 D1 0.94 ft³ sealed · 1.52 ft³ ported
Sundown Audio Xv4-10 D2 0.87 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
American Bass XFL-1044 0.55 ft³ sealed · 1.38 ft³ ported
Kicker Solo-Baric L7X 10" 2-Ohm DVC (49L7X102) 0.71 ft³ sealed · 2.01 ft³ ported

FAQ

What box does the Fi Audio Xv5 10 D1 need?

Recommended net volume: 0.49 ft³ sealed, 0.81 ft³ ported tuned to 46 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 D1 Thiele/Small specs?

Fs 39.2 Hz, Qts 0.41, Vas 0.29 ft³, Xmax 0.91″, Sd 50.3 in².

What is the Fi Audio Xv5 10 D1 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 D1 handle and how do I wire it?

RMS power rating: 1,500 W. Dual 1 Ω voice coils: series gives 2 Ω, parallel gives 0.5 Ω at the amp. Wiring for several subs and amp power — in the wiring calculator.