What amplifier power does the M18D1 need?

It is rated 2,000 W RMS, so plan on an amplifier that delivers close to that at 2 ohms with the dual 1-ohm coils wired in series. Its 85.8 dB sensitivity means it rewards power.

Can I use it in a sealed box?

Sundown does not recommend a sealed enclosure for this driver. A ported box of about 7 cu ft tuned to 32 Hz with 112 sq in of port area is the suggested starting point.

What is the difference between the D1 and D2 versions?

The D1 has dual 1-ohm voice coils and the D2 has dual 2-ohm coils. The D1 wires to 2 ohms or 0.5 ohms, the D2 to 4 ohms or 1 ohm, so pick the one that matches your amplifier.

How much space does the enclosure take up?

The driver itself displaces about 0.25 cu ft. Add that to the 7 cu ft ported recommendation, and the 4th order option uses a 3 cu ft sealed side plus a 9 cu ft ported side.

What cutout and depth does it need?

It needs a 16.68-inch cutout and about 14.05 inches of mounting depth, with an outside diameter of 18.46 inches.

Sundown Audio M18D1 18" 4000W Max Dual 1-Ohm Voice Coil DVC Car Subwoofer

Best price now

$654.99at WalmartChecked Nov 8

Prices are checked against each store and labelled with when.

Visit Walmart

Sundown Audio M18D1 18" 4000W Max Dual 1-Ohm Voice Coil DVC Car Subwoofer

Best price now

$654.99at WalmartChecked Nov 8

Prices are checked against each store and labelled with when.

Visit Walmart

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Price facts

Last seen at $654.99 at Walmart on Nov 8.

Our take on the Sundown Audio M18D1 18" 4000W Max Dual 1-Ohm Voice Coil DVC Car Subwoofer

The Sundown Audio M18D1 is an 18-inch car subwoofer rated 2,000 W RMS and 4,000 W peak, built with a dual 1-ohm voice coil, a quad-stack magnet and a mega roll surround. Its low Qts (0.684) and 35 mm Xmax suit high-output ported builds rather than sealed boxes. It is aimed at SPL and bass-heavy listeners who have the amplifier power and the space for a large enclosure. Against smaller M-series drivers it moves far more air but demands a 7 cu ft ported box and serious electrical support.

Best forSPL and bass-heavy buildsLarge trunks and SUVs with room for a big ported boxListeners with a high-power amplifierPorted or 4th order enclosure builds

Pros

2,000 W RMS and 4,000 W peak handling
Dual 1-ohm coils allow flexible wiring
35 mm Xmax for long excursion
Quad-stack magnet and mega roll surround
Detailed enclosure specs provided

Cons

Sealed enclosures not recommended
Needs a large 7 cu ft ported box
Low 85.8 dB sensitivity needs plenty of power
Heavy moving mass (651 g Mms)
18-inch size limits fitment

Sundown Audio M18D1 18" 4000W Max Dual 1-Ohm Voice Coil DVC Car Subwoofer prices at every store

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In stockSold by mytires4less LLCReturns: Sold by a Walmart Marketplace seller; returns go to the seller under the seller's returns policy.
$654.99Free shippingChecked Nov 8
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About the Sundown Audio M18D1 18" 4000W Max Dual 1-Ohm Voice Coil DVC Car Subwoofer

The Sundown Audio M18D1 is an 18-inch car subwoofer from the M-Series. It has a dual 1-ohm voice coil and is rated at 2000 watts RMS and 4000 watts peak.

It is built with a mega roll surround, an etched frame with an all-black backplate and a quad stack magnet structure. The M-Series is also offered in a dual 2-ohm configuration.

For enclosures, a ported box of 7.0 cu ft tuned to 32 Hz is recommended. A sealed enclosure is not recommended.

Size: 18 in
Color: Black
Power: 2000 W RMS, 4000 W peak
Voice coil: Dual 1-ohm
Series: M-Series
Xmax: 35 mm
Sensitivity: 85.836 dB at 1 W/1 m
RE: 2.12 ohms
FS: 26.152 Hz
VAS: 112.182 L
Qes: 0.782
Qms: 5.452
Qts: 0.684
Le: 1.797 mH
BL: 17.044 N/A
Mms: 651.24 g
Cms: 56.86 uM/N
Sealed enclosure: Not recommended
Ported enclosure: 7.0 cu ft, tuned to 32 Hz, 112 sq in port area
4th order enclosure: Sealed side 3.0 cu ft; ported side 9.0 cu ft, 180 sq in port area, 8 in port length
Displacement: 0.25 cu ft
Depth: 14.05 in
Outside diameter: 18.46 in
Cut-out: 16.68 in

Specifications

color: BlackSource
size: 18"Source

Questions and answers

What amplifier power does the M18D1 need?: It is rated 2,000 W RMS, so plan on an amplifier that delivers close to that at 2 ohms with the dual 1-ohm coils wired in series. Its 85.8 dB sensitivity means it rewards power.
Can I use it in a sealed box?: Sundown does not recommend a sealed enclosure for this driver. A ported box of about 7 cu ft tuned to 32 Hz with 112 sq in of port area is the suggested starting point.
What is the difference between the D1 and D2 versions?: The D1 has dual 1-ohm voice coils and the D2 has dual 2-ohm coils. The D1 wires to 2 ohms or 0.5 ohms, the D2 to 4 ohms or 1 ohm, so pick the one that matches your amplifier.
How much space does the enclosure take up?: The driver itself displaces about 0.25 cu ft. Add that to the 7 cu ft ported recommendation, and the 4th order option uses a 3 cu ft sealed side plus a 9 cu ft ported side.
What cutout and depth does it need?: It needs a 16.68-inch cutout and about 14.05 inches of mounting depth, with an outside diameter of 18.46 inches.
Where is the Sundown Audio M18D1 18" 4000W Max Dual 1-Ohm Voice Coil DVC Car Subwoofer cheapest?: At Walmart, for $654.99, as of our latest check.