Sundown Audio Xv2-10 D4

10″ subwoofer · dual 4 Ω · 1,500 W RMS

38.2 HzFs, resonance

0.43Qts

0.36 ft³Vas

1.18″Xmax

1,500 WRMS

Source	web.archive.org · 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

0.71 ft³ (20 L)

Net volume

Bass character (Qtc)	Dry and tight · 0.53
Fc	47 Hz
F3 (−3 dB, no cabin gain)	69 Hz
Example box (outside)	13″ × 13″ × 11 3/8″

Open sealed box in designer

Ported

deeper, louder

0.88 ft³ (25 L)

Net volume

Tuning (Fb)	37 Hz
Port	slot 1 15/16 × 14 5/16″, 58″ long
Port velocity at 1,500 W	79 ft/s
F3 (−3 dB, no cabin gain)	33 Hz
Example box (outside)	31 1/2″ × 15 3/4″ × 9 7/8″

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: 1.06 ft³ (30 L) tuned to 28 Hz, 31 1/2″ × 15 3/4″ × 12 9/16″ 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 4 Ω
RMS power	1,500 W
Fs	38.2 Hz
Qts	0.43
Qes	0.47
Qms	4.88
Vas	0.36 ft³

Re (one coil)	3.05 Ω
Sd	55.9 in²
Xmax	1.18″
Vd	66.1 in³ calc.
Mms	314 g calc.
BL	22.1 T·m calc.
EBP	81 — sealed or ported calc.
Sensitivity, 1 W / 1 m	82.8 dB calc.

Mounting dimensions

Cutout diameter	10″
Mounting depth	8 7/8″
Overall diameter	11 5/8″

Cone area (Sd) calculated from Fs, Vas and Mms: 55.9 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

web.archive.org/web/20161216050348/http://www.sundownaudio.com/index.php/subwoof

Other Sundown Audio 10″ models

Sundown Audio Ev2-10 D2 10″ · dual 2 Ω
Sundown Audio Ev2-10 D4 10″ · dual 4 Ω
Sundown Audio Ev4-10 D2 10″ · dual 2 Ω
Sundown Audio Ev4-10 D4 10″ · dual 4 Ω
Sundown Audio HZ-10 D4 10″ · dual 4 Ω
Sundown Audio HZS-10 D4 10″ · dual 4 Ω
Sundown Audio LCSv2-10 D4 10″ · dual 4 Ω
Sundown Audio M10 D1 10″ · dual 1 Ω
Sundown Audio M10 D2 10″ · dual 2 Ω
Sundown Audio NSv2-10 D2 10″ · dual 2 Ω
Sundown Audio NSv4-10 D1 10″ · dual 1 Ω
Sundown Audio NSv4-10 D2 10″ · dual 2 Ω

Similar 10″ subwoofers from other brands

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

Crossfire C7 10D1 0.57 ft³ sealed · 0.81 ft³ ported
American Bass XFL-1044 0.55 ft³ sealed · 1.38 ft³ ported
Resilient Sounds Gold 10 D4 0.57 ft³ sealed · 0.81 ft³ ported
Fi Audio SSD NEO 10 D1 0.53 ft³ sealed · 0.78 ft³ ported
Fi Audio SSD NEO 10 D2 0.53 ft³ sealed · 0.78 ft³ ported
Ground Zero GZHW 10XSPL-D1 (2x1 Ohm) 0.49 ft³ sealed · 0.85 ft³ ported

FAQ

What box does the Sundown Audio Xv2-10 D4 need?

Recommended net volume: 0.71 ft³ sealed, 0.88 ft³ ported tuned to 37 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 Sundown Audio Xv2-10 D4 Thiele/Small specs?

Fs 38.2 Hz, Qts 0.43, Vas 0.36 ft³, Xmax 1.18″, Sd 55.9 in².

What is the Sundown Audio Xv2-10 D4 mounting depth?

Mounting depth is 8 7/8″, cutout diameter 10″. The inside depth of the box must exceed the mounting depth by at least 1″.

How much power does the Sundown Audio Xv2-10 D4 handle and how do I wire it?

RMS power rating: 1,500 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.