Alpine SWS-12D2

Type-S 12" subwoofer with dual 2-ohm voice coils

Outlet: Scratch & Dent

Item #: 500SWS12D2

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Bring on the bass

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You can tell that Alpine's bass pedigree runs deep in their latest line of Type-S subwoofers. Using technology found in their higher end subs, this sub will rock your system and add depth to your favorite tracks. You'll love the detail it brings to a bass guitar and the impact you'll feel when a kick drum hits. Throw a couple of these in your ride and prepare to be amazed by unrelenting bass.

Side view of SWS-12D2 subwoofer

Advanced materials

The SWS-12D2 can handle up to 500 watts of RMS power, so you can drive it hard and it'll keep up. The tough 12" Kevlar® treated cone stays rigid under pressure, while its rubber HAMRS surround allows for maximum excursion. Its dual 2-ohm voice coils allow for wiring flexibility which helps if you plan on adding another subwoofer down the line. Also, it rocks in both sealed and ported boxes, so you can choose an enclosure that suits your tastes.

Note: If you are wiring this DVC sub for lower impedance, make sure that your amp is compatible.

To drive this single subwoofer, we recommend a mono amplifier rated between 375 and 750 watts RMS at 4 ohms. For more information, please refer to our article on How to Match Subwoofers and Amplifiers.

Note: Sorry, Crutchfield cannot ship Alpine products to Guam or Puerto Rico.

Product Highlights:

  • 12" subwoofer with dual 2-ohm voice coils
  • Kevlar reinforced pulp cone with HAMRS Santoprene rubber surround
  • frequency response: 26-200 Hz
  • power handling: 150-500 watts RMS (250 watts per coil)
  • peak power: 1,500 watts
  • sensitivity: 86.4 dB
  • top-mount depth: 5-13/16"
  • sealed box volume: 0.71-1.06 cu. ft.
  • ported box volume: 1.06-1.56 cu. ft.
  • warranty: 1 year
  • Our 60-day money-back guarantee

What's a component sub and why would I want one?

A component sub is simply a speaker that's designed to reproduce bass once it's installed in a compatible enclosure. Think about the impact of a movie soundtrack in a big theater or even in your own home HDTV setup. A component sub can add the same kind of power to the music in your car. And a car sub is not all about the boom that you hear on a street corner (although that's cool too) - you can pair a component sub with your choice of enclosure to get bass just the way you like it, from tight and punchy to fat and loose. And once you experience music in your car with a well-tuned subwoofer, you'll never go back.

Alpine SWS-12D2 Reviews

Average Customer Review:

4 reviews
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Great buy and even better service thanks

Written By Preston, Leon ks on Monday, January 26, 2015

Crutchfield Customer Review (What's this?)

  • "Coolness Factor"
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Great product for the price

Pretty Nice

Written By Spencer C., Harrisonburg, VA on Monday, October 13, 2014

  • "Coolness Factor"
  • Build Quality
  • Ease of Use
  • Sound Quality
  • Value

Put it in a ported and sealed box. Sounds better ported in my opinion. Very nice with the old school hip-hop songs, but I would prefer a different one for the newer songs.

Pros: Great sound Great Price

Cons: None

Awesome speakers!!!!

Written By Chris, Fl on Thursday, January 23, 2014

Crutchfield Customer Review (What's this?)

  • "Coolness Factor"
  • Build Quality
  • Ease of Use
  • Sound Quality
  • Value

These 2 speakers work great with Alpine MRX-M110 amp. The speakers hit hard in a sealed box!!

Pros: Great value!! Sounds great and hits hard!!

Cons: None.

good clean sounding bass

Written By LoganG, Charlottesville, Va on Sunday, September 01, 2013

  • "Coolness Factor"
  • Build Quality
  • Ease of Use
  • Sound Quality
  • Value

I have two of these in a sealed box hooked up to a 4x160 watt amp so each one gets 320 watts and they hit hard. Anybody can hear me for atleast 5 minutes away. I want to get 2 more soon and make my system even louder.

Pros: everything

Cons: none

Hands-on research

What's in the box?

Download owner's manual

  • One 12" Dual 2-ohm voice coil subwoofer
  • 1 Rubber concealing ring (installed)
  • Two 3" jumper cables (each has a single banana connector on each end)
  • Type-S Subwoofer Application Guide (English/ French)
  • On-line product registration information (English/ French/ Spanish)
  • Warranty information (English/ French)
  • Important Notice! (English/ French)

Scratch & Dent items may be missing non-essential accessories. In some cases the manufacturer's accessories have been replaced with generic equivalents.

Product Research

Enclosure Compatibility


Kevlar Reinforced Pulp Cone: This Alpine Type-S subwoofer uses a parabolic cone structure, with a Kevlar reinforced pulp cone and a Poly-Mica dust cap. Kevlar adds strength and tear resistance to the woofer cone while maintaining the benefits of a pulp cone design. The oversized, inverted poly-mica dust cap increases rigidity and virtually eliminates cone distortion at extreme volume levels.

HAMRS: The woofer features a High Amplitude Multi Roll Surround (HAMRS), made of Santoprene, that allows a large linear excursion and greater SPL. The HAMRS design allows extreme excursions without sacrificing valuable cone area.

Progressive Spider: The progressive Conex spider has reinforced layer tinsel leads to ensure reliable and consistent control of the tinsel leads and eliminate any mechanical noise or interference often seen in high excursion cone designs.

Compound Radius Curve Pole Geometry: Alpine's Patented Compound Radius Curve pole geometry ensures a symmetrical magnetic field, while optimizing flux density to reduce distortion and further improve power handling and output.

Oversized Voice Coil: The oversized (65mm), high-temperature, 5-layer dual voice coils offer power handling up to 500W RMS / 1500W Peak (250 watts RMS per coil).

Dual Voice Coils: For system flexibility, the woofer has two 2-ohm voice coils. When the voice coils are wired in parallel, the woofer presents a 1-ohm load. When the voice coils are wired in series, the woofer presents a 4-ohm load.

Spring Terminals: The spring post terminals are all located on one side of the woofer. The terminals will accept pin connectors, single banana plugs, or bare wire up to 8 gauge.

Jumpers: Included with the woofer are two voice coil terminal jumpers. These jumpers allow you to easily wire the voice coils in parallel (for a 1-ohm load) or series (for a 4-ohm load).

Enclosure Compatibility

Sealed Box: Alpine recommends a sealed enclosure with an internal volume between 0.71 and 1.06 cubic feet, with an ideal volume of 0.9 cubic feet. Sealed enclosures provide the most control over a woofer, will handle a lot of power, and provide accurate sonic reproduction, making them suitable to all types of music.

Ported Box Volume: The recommended ported box volume ranges from 1.06 to 1.56 cubic feet, with the ideal size being 1.46 cubic feet, using a slot port measuring 12.5" (W) x 1" (H) x 18" (L).

Our Product Research Team

At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team. They verify what’s in the box, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.