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Deal.ai › Sundown Audio › Subwoofers
Sundown Audio
Sundown Audio SML12D4 12" 500W RMS Dual 2-Ohm Voice Coil Shallow Mount Subwoofer

Sundown Audio SML12D4 12" 500W RMS Dual 2-Ohm Voice Coil Shallow Mount Subwoofer

Best price now

$249.99at WalmartChecked Nov 12

Compared across 2 stores. Prices are checked against each store and labelled with when.

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Price facts

  • Last seen at $249.99 at Walmart on Nov 12.
  • Checked at 2 stores.

Our take on the Sundown Audio SML12D4 12" 500W RMS Dual 2-Ohm Voice Coil Shallow Mount Subwoofer

The Sundown Audio SML12D4 is a 12-inch shallow-mount subwoofer built for tight spaces. It handles 500 watts RMS with dual 4-ohm voice coils, a 13mm one-way Xmax and a vented, FEA-optimized motor with shorting rings. Its 4.44-inch mounting depth and 18.2-pound build let it fit behind seats and in shallow boxes where full-depth subs won't go. Compared with mainstream shallow subs, it targets higher power handling and excursion, so it suits people who want real output from a compact enclosure rather than a basic factory upgrade.

Best forTruck and SUV owners with shallow mounting depthSealed or small ported enclosuresDrivers wanting 500W RMS handling in a slim subSQ-leaning builds with dual 4-ohm wiring flexibility
Pros
  • 500W RMS power handling for a shallow sub
  • 13mm one-way Xmax gives strong excursion
  • Dual 4-ohm coils allow flexible final impedance
  • Vented motor gap and shorting rings for cooling and control
  • Bolted motor structure resists motor shift
  • Shallow 4.44-inch mounting depth fits tight spaces
Cons
  • Needs a capable amp to reach its RMS rating
  • Shallow design limits low-end extension versus full-depth subs
  • Heavier than some shallow rivals at 18.2 lbs
  • Not a drop-in for factory locations without an enclosure

Sundown Audio SML12D4 12" 500W RMS Dual 2-Ohm Voice Coil Shallow Mount Subwoofer prices at every store

  • WalmartNew

    In stockSold by D-C-OReturns: Sold by a Walmart Marketplace seller; returns go to the seller under the seller's returns policy.

    $249.99Free shippingChecked Nov 12
    Visit Walmart
  • AmazonNew

    Availability unknown

    As an Amazon Associate, Deal.ai earns from qualifying purchases.

    $249.99Free shippingChecked Nov 12
    Visit Amazon

Store links may earn us a commission.

Sundown Audio SML12D4 12" 500W RMS Dual 2-Ohm Voice Coil Shallow Mount Subwoofer price history

Lowest price we've seen: $249.99 on Nov 12 at Amazon. Tracked across 1 store since Nov 12.

What reviewers say

Owners of Sundown shallow subs generally praise output and build for the size, and the SML line is treated as a serious shallow option rather than a budget placeholder.

What people mention
  • OutputPraisedOwners say it plays louder than expected for a shallow sub.
  • BuildPraisedThe bolted motor and stamped steel frame are described as sturdy.
  • Power handlingPraisedUsers report it takes its rated power without distress.
  • Low-end depthMixedSome note shallow subs like this give up some very low extension.
  • EnclosureMixedResults depend heavily on the box it is installed in.

About the Sundown Audio SML12D4 12" 500W RMS Dual 2-Ohm Voice Coil Shallow Mount Subwoofer

This is a 12-inch shallow-mount subwoofer rated at 500 watts RMS. It has dual voice coils and a mount depth of 4.44 inches.

The motor has a double stacked main magnet and a single stacked secondary magnet. The motor gap is fully FEA-optimized and vented for cooling, and full magnet ID shorting rings are fitted. The motor structure is bolted to prevent motor shift.

The frame is high-strength stamped steel. The subwoofer has beefy flat tinsel leads and spring-loaded terminals.

Size
12 inches
Power
500 watts RMS
Voice coils
Dual
Xmax
13 mm one-way, by 70% BL
Mount depth
4.44 in
Weight
18.20 lbs
Carton size
15 × 15 × 8.25 in
Frame
High-strength stamped steel
Magnets
Double stacked main magnet, single stacked secondary magnet
Motor
FEA-optimized motor gap, vented magnetic gap, full magnet ID shorting rings, bolted structure to prevent motor shift
Terminals
Spring loaded
Leads
Flat tinsel

Questions and answers

What amplifier power does the SML12D4 need?
It is rated 500 watts RMS. Pair it with an amp that delivers close to that at the final impedance of its dual 4-ohm coils.
How do I wire the dual 4-ohm voice coils?
Wiring the coils in parallel gives a 2-ohm final load; in series it gives 8 ohms. Choose based on what your amp is stable at.
Will it fit in a shallow enclosure?
Its mounting depth is 4.44 inches, so it fits boxes that full-depth 12s cannot. Check your box depth plus clearance for the motor and terminals.
Is it a good upgrade over a factory sub?
Yes, if you add a proper enclosure and amplifier. It offers far more excursion and power handling than typical factory shallow drivers.
What size enclosure does it want?
Sundown rates it for small sealed or compact ported boxes. A sealed box is the simplest route; ported gives more output if you have the space.
Where is the Sundown Audio SML12D4 12" 500W RMS Dual 2-Ohm Voice Coil Shallow Mount Subwoofer cheapest?
At Walmart, for $249.99, as of our latest check.
Where can I buy the Sundown Audio SML12D4 12" 500W RMS Dual 2-Ohm Voice Coil Shallow Mount Subwoofer?
2 stores we checked sell it, including Walmart, Amazon.

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