Sundown Audio Zv3-12 D1

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

47.2 HzFs, resonance

0.47Qts

0.62 ft³Vas

0.98″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

0.81 ft³ (23 L)

Net volume

Bass character (Qtc)	Flat and accurate · 0.62
Fc	63 Hz
F3 (−3 dB, no cabin gain)	75 Hz
Example box (outside)	14 3/16″ × 14 3/16″ × 11 3/16″

Open sealed box in designer

Ported

deeper, louder

1.34 ft³ (38 L)

Net volume

Tuning (Fb)	34 Hz
Port	slot 1 3/4 × 14 5/16″, 39 9/16″ long
Port velocity at 1,500 W	102 ft/s
F3 (−3 dB, no cabin gain)	33 Hz
Example box (outside)	19 13/16″ × 15 3/4″ × 15 15/16″

At 1,500 W this example’s port will be noisy: air speed 102 ft/s, while the limit is 82 ft/s. It stays quiet up to about 970 W. Full power needs a port of at least 31.5 in², which means a bigger box than this example — size it in the designer.

Open ported box in designer

Deeper: 1.62 ft³ (46 L) tuned to 36 Hz, 26″ × 15 3/4″ × 15 15/16″ 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	12″
Voice coils	dual 1 Ω
RMS power	1,500 W
Fs	47.2 Hz
Qts	0.47
Qes	0.5
Qms	7.2
Vas	0.62 ft³

Re (one coil)	0.75 Ω
Sd	84.9 in²
Xmax	0.98″
Vd	83.6 in³ calc.
Mms	276 g calc.
BL	11.1 T·m calc.
EBP	94 — sealed or ported calc.
Sensitivity, 1 W / 1 m	87.7 dB calc.

Mounting dimensions

Cutout diameter	11 1/8″
Mounting depth	8 3/4″
Overall diameter	12 5/8″

Cone area (Sd) calculated from Fs, Vas and Mms: 84.9 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

Other Sundown Audio 12″ models

Sundown Audio Ev2-12 D2 12″ · dual 2 Ω
Sundown Audio Ev2-12 D4 12″ · dual 4 Ω
Sundown Audio Ev4-12 D2 12″ · dual 2 Ω
Sundown Audio Ev4-12 D4 12″ · dual 4 Ω
Sundown Audio HZ-12 D4 12″ · dual 4 Ω
Sundown Audio HZS-12 D4 12″ · dual 4 Ω
Sundown Audio LCSv1-12 D4 12″ · dual 4 Ω
Sundown Audio LCSv2-12 D4 12″ · dual 4 Ω
Sundown Audio M12 D1 12″ · dual 1 Ω
Sundown Audio M12 D2 12″ · dual 2 Ω
Sundown Audio NSv1-12 D2 12″ · dual 2 Ω
Sundown Audio NSv2-12 D2 12″ · dual 2 Ω

Similar 12″ subwoofers from other brands

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

Hertz SPL Show SX 300D (DVC 2+2 ohm) 0.71 ft³ sealed · 1.20 ft³ ported
Ground Zero GZPW 12SPL (2x1 Ohm) 0.87 ft³ sealed · 1.77 ft³ ported
DD Audio VO-W712 D2 0.71 ft³ sealed · 1.20 ft³ ported
DD Audio VO-W712 D4 0.71 ft³ sealed · 1.20 ft³ ported
Audiobahn AWIS12P 0.81 ft³ sealed · 1.20 ft³ ported
Massive Audio HIPPO XL122 0.74 ft³ sealed · 1.31 ft³ ported

FAQ

What box does the Sundown Audio Zv3-12 D1 need?

Recommended net volume: 0.81 ft³ sealed, 1.34 ft³ ported tuned to 34 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 Zv3-12 D1 Thiele/Small specs?

Fs 47.2 Hz, Qts 0.47, Vas 0.62 ft³, Xmax 0.98″, Sd 84.9 in².

What is the Sundown Audio Zv3-12 D1 mounting depth?

Mounting depth is 8 3/4″, cutout diameter 11 1/8″. The inside depth of the box must exceed the mounting depth by at least 1″.

How much power does the Sundown Audio Zv3-12 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.