Sundown Audio Zv5-12 D1

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

33 HzFs, resonance

0.45Qts

0.75 ft³Vas

1.38″Xmax

2,000 WRMS

The Sundown Audio Zv5-12 D1 is a 12″ subwoofer. With Qts 0.45 and EBP 63 it works both sealed and ported: sealed is tighter and smaller, ported is deeper and louder. Long excursion (Xmax 1.38″) — built for loud music and high power.

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, 2,000 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

1.06 ft³ (30 L)

Net volume

Bass character (Qtc)	Dry and tight · 0.59
Fc	43 Hz
F3 (−3 dB, no cabin gain)	54 Hz
Example box (outside)	14 3/16″ × 14 3/16″ × 13 13/16″

Open sealed box in designer

Ported

deeper, louder

1.06 ft³ (30 L)

Net volume

Tuning (Fb)	36 Hz
Port	slot 1 9/16 × 14 5/16″, 40″ long
Port velocity at 2,000 W	111 ft/s
F3 (−3 dB, no cabin gain)	32 Hz
Example box (outside)	31 1/2″ × 15 3/4″ × 8 15/16″

At 2,000 W this example’s port will be noisy: air speed 111 ft/s, while the limit is 82 ft/s. It stays quiet up to about 1,050 W. Full power needs a port of at least 30.7 in², which means a bigger box than this example — size it in the designer.

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: 1.27 ft³ (36 L) tuned to 30 Hz, 31 1/2″ × 15 3/4″ × 11 7/8″ 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	2,000 W
Fs	33 Hz
Qts	0.45
Qes	0.52
Qms	3.63
Vas	0.75 ft³

Re (one coil)	1 Ω
Sd	67 in²
Xmax	1.38″
Vd	92.3 in³ calc.
Mms	292 g calc.
BL	10.8 T·m calc.
EBP	63 — sealed or ported calc.
Sensitivity, 1 W / 1 m	83.6 dB calc.

Mounting dimensions

Cutout diameter	11 1/8″
Mounting depth	11 1/4″
Overall diameter	12 11/16″

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.

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
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
Challenger / Charger — trunk sealed and ported box

Cone area (Sd) calculated from Fs, Vas and Mms: 67 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

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
Sundown Audio Zv5-12 D1	dual 1 Ω	1 Ω	0.52	0.75 ft³	1.06 ft³	1.06 ft³ · 36 Hz
Sundown Audio Zv5-12 D2	dual 2 Ω	2 Ω	0.53	0.62 ft³	1.06 ft³	1.06 ft³ · 36 Hz

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.

Memphis Car Audio MJ1212 (MOJO 12", 1ohm setting) 0.79 ft³ sealed · 1.20 ft³ ported
Swat HLG-P12D1 0.92 ft³ sealed · 1.20 ft³ ported
Ascendant Audio Havoc 12 D1 0.67 ft³ sealed · 1.20 ft³ ported
Ascendant Audio Havoc 12 D2 0.67 ft³ sealed · 1.20 ft³ ported
Fi Audio NEO 4.7 12 D1 0.94 ft³ sealed · 1.20 ft³ ported
Fi Audio NEO 4.7 12 D2 0.94 ft³ sealed · 1.20 ft³ ported

FAQ

What box does the Sundown Audio Zv5-12 D1 need?

Recommended net volume: 1.06 ft³ sealed, 1.06 ft³ ported tuned to 36 Hz — for one sub in a sedan at 2,000 W. Fit the box to your space and amp in the free calculator, with plans and a cut sheet.

What are the Sundown Audio Zv5-12 D1 Thiele/Small specs?

Fs 33 Hz, Qts 0.45, Vas 0.75 ft³, Xmax 1.38″, Sd 67 in².

What is the Sundown Audio Zv5-12 D1 mounting depth?

Mounting depth is 11 1/4″, 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 Zv5-12 D1 handle and how do I wire it?

RMS power rating: 2,000 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.

Is the Sundown Audio Zv5-12 D1 better sealed or ported?

EBP 63: both work — sealed 1.06 ft³ is tighter and smaller, ported 1.06 ft³ tuned to 36 Hz is deeper and louder.

What port does the Sundown Audio Zv5-12 D1 need?

For the 1.06 ft³ ported box tuned to 36 Hz: slot 1 9/16 × 14 5/16″, 40″ long, area 22.6 in²; or a round port Ø5 3/8″, ≈ 40″ long. Port air speed at 2,000 W: 111 ft/s.

What box do two Sundown Audio Zv5-12 D1 subs need?

Two subs need twice the volume: 2.12 ft³ sealed, or 2.12 ft³ ported at the same 36 Hz tuning with twice the port area. One shared chamber or one per sub — whatever fits your vehicle.