Alpine SWR-8D2

Type-R 8" subwoofer with dual 2-ohm voice coils

Item #: 500SWR8D2

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Maximum bass output

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Alpine's Type-R subwoofers will bring big bass to just about any vehicle. The SWR-8D2 8" sub features a cone made from Kevlar® treated pulp — the same material used to make bulletproof vests — and its durable HAMR Santoprene™ surround allows for huge amounts of excursion. This sub was built for bassheads that want the best of both worlds: accurate response and otherworldly thump.

Side view of SWR-8D2 subwoofer

Bring on the power

The SWR-8D2 can handle up to 350 watts RMS, so be sure to choose a suitable amplifier as these subs definitely want lots of juice. Its dual oversized 2-ohm voice coils offer the wiring flexibility you'll appreciate as your system changes and grows, ensuring that you can always pull maximum power from your amp. It works well in sealed and ported enclosures so you can choose what kind of bass you want to hear and feel.

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 260 and 525 watts RMS at 4 ohms. For more information, please refer to our article on How to Match Subwoofers and Amplifiers.

Product Highlights:

  • 8" subwoofer with dual 2-ohm voice coils
  • Kevlar reinforced pulp cone with HAMR Santoprene rubber surround
  • frequency response: 30-200 Hz
  • power handling: 150-350 watts RMS (175 watts per coil)
  • peak power: 1,000 watts
  • sensitivity: 83.5 dB
  • top-mount depth: 4-1/2"
  • sealed box volume: 0.15-0.50 cu. ft.
  • ported box volume: 0.25-0.70 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.

Hands-on research

What's in the box?

Download owner's manual

  • One 8" Dual 2-ohm voice coil subwoofer
  • 1 Rubber concealing ring (installed)
  • Two 4.5" jumper cables (each cable has a single banana connector on each end)
  • Type-R 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

Features
Enclosure Compatibility

Features

Kevlar Reinforced Pulp Cone: This Alpine Type-R subwoofer has a two-piece structural parabolic Kevlar reinforced pulp cone. Kevlar adds strength and tear resistance to the woofer cone while maintaining the benefits of a pulp cone design. There is also an oversized inverted poly-mica dust cap, which 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 (40mm), high-temperature, 4-layer dual voice coils offer increased power handling to 350W RMS / 1000W Peak.

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 bare wire up to 8 gauge, pin connectors, or single banana plugs.

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 Volume: The recommended sealed box volume ranges from 0.2 cubic feet to 0.55 cubic feet, with 0.3 cubic feet being the ideal size.

Ported Box Volume: The recommended ported box volume ranges from 0.3 cubic feet to 0.75 cubic feet. The ideal size is 0.7 cubic feet, using a slot port measuring 7" (W) x 3/4" (H) x 15-1/2" (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.

Alpine SWR-8D2 Reviews

Average Customer Review:

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Awesome Subwoofer!!

Written By Alex, Long Beach, CA on Tuesday, March 10, 2015

Crutchfield Customer Review (What's this?)

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

I recommend this product if you want clean bass in your car or truck. It provides deep bass in your vehicle even with only one of them! I installed it in my car and man that thing bumps really good!!! I installed the Alpine mrv-f300 and i bridged the sub to channel 3 and 4 pulling in around 150 watts rms and i an very satisfied with how it sounds. The box i used for the amp is an 8 in groundshaker. I personally recommend to use this box because its tunned for subwoofers with high power.

Alpine SWR-8D2

Written By Dan, Wichita, KS on Saturday, December 21, 2013

Crutchfield Customer Review (What's this?)

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

Exceptional sound quality. Nice tight response, great range for an 8. Not boomy or sloppy. Running two in a ported box built to Alpine's specs powered by an Alpine MRX-M110 @ 2ohms (1100 watts RMS)

Pros: Size, range, quality

Cons: none

So far amazing

Written By Stealth1546, Alice, Texas on Monday, September 16, 2013

Crutchfield Customer Review (What's this?)

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

Bought two of these. They are perfect for my truck. Glad I invested in these

Pros: Subs give clean loud bass, quality is quite noticeable, can fit about anywhere.

Cons: The jumper cables tips that come with it were too small and can come off the subs. Easy fix, just use speaker cable instead.

Audiophile bass,

Written By Chuck, Texas USA on Monday, August 05, 2013

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

Depp tuneful bass in a small box size, use 2 for best results I replaced 2 jl 8w3v2 with these in a very small box that fits under the passenger side rear seat of my Titan. The jl's played pretty low, but I was missing the definition that, as an 'mature' audiophile, i like in a sub. This sub has great delineation of individual bass notes. It plays low and tight. Its also surprisingly loud. One thing I would recommend, break it in on the bench before using it if you can. I ran test tones out of my ipod to it, free air, for about 3 days, starting around 60hz and then moving on down each day 10hz to 40hz. That noticeably loosened the suspension, could feel it with pushing on the cone. Its a great value in a sub. I liked it so much I bought a 10 for my car, replaced a ID max sub. Again, this alpine bettered in in the areas that matter to me, definition and accuracy. Only downside, the alpine grills for it are expensive. Get one and try it, I think you will find it's a keeper

Pros: Fast and articulate, inexpensive

Cons: none

Great, punchy sub!

Written By I, Leominster, MA on Friday, July 12, 2013

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

Okay, picked up a couple of these because I was looking for something with more SQ than SPL. I went with two of them since I have an amp that can drive them (alpine mrp-m500), These things are unbelievably punchy with a sealed box. Don't expect them to push much below 60hz due to the lack of size, but if you are like me and listen to more rock and metal, then you will be pleasantly surprised. I am using a 0.30 cubic foot box, with each sub in its own box. No idea how these would sound in a ported box. The one downside is that you really need two of them. The enclosures are small enough so that two of them don't take up a lot of space. Just one of these is kinda, Meh, but they really shine with two of them

Pros: Good solid punchy thump your chest bass. small sealed enclosure requirement

Cons: Not all that great for music with lots of tones sustained below 60hz. Need 2 to really see them shine