Watch a video review from one of our experts

Alpine SWR-12D4

Type-R 12" subwoofer with dual 4-ohm voice coils

Outlet: Open Box

Item #: 500SWR12D4

Low Stock

14 Reviews | 3 questions - 5 answers

Was:$249.99

Outlet Savings:-$25.00

Your price: $224.99 Earn up to 225 Rewards points

Add to Cart Free Shipping Lifetime Tech Support

+ Add to wishlist + Email me alerts for this product

New Stock: $249.99 Scratch & Dent: $212.49

View all associated offers

Maximum bass output

Alpine Authorized Online Dealer

Alpine's Type-R subwoofers will bring big bass to just about any vehicle. The SWR-12D4 12" 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-12D4 subwoofer

Bring on the power

The SWR-12D4 can handle an astounding 1000 watts of RMS power, so be sure to choose a suitable amplifier as these bass monsters definitely want lots of power. Its dual oversized 4-ohm voice coils offer the wiring flexibility you'll appreciate as your system changes and grows, so 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 750 and 1500 watts RMS at 2 ohms. For more information, please refer to our article on How to Match Subwoofers and Amplifiers.

Product Highlights:

  • 12" subwoofer with dual 4-ohm voice coils
  • Kevlar reinforced pulp cone with HAMRS Santoprene rubber surround
  • frequency response: 24-200 Hz
  • power handling: 300-1,000 watts RMS (500 watts per coil)
  • peak power: 3,000 watts
  • sensitivity: 84.9 dB
  • top-mount depth: 6-3/8"
  • sealed box volume: 0.75-1.00 cu. ft.
  • ported box volume: 1.25-1.50 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 12" Dual 4-ohm voice coil subwoofer
  • 1 Rubber concealing ring (installed)
  • Two 3" jumper cables (each 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)

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 (65mm), high-temperature, 4-layer dual voice coils offer increased power handling to 1000W RMS / 3000W Peak.

Dual Voice Coils: For system flexibility, the woofer has two 4-ohm voice coils. When the voice coils are wired in parallel, the woofer presents a 2-ohm load. When the voice coils are wired in series, the woofer presents an 8-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 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 2-ohm load) or series (for an 8-ohm load).

Enclosure Compatibility

Sealed Box Volume: The recommended sealed box volume ranges from 0.65 cubic feet to 1.1 cubic feet, with 0.85 cubic feet being the ideal size.

Ported Box Volume: The recommended ported box volume ranges from 1.1 cubic feet to 1.6 cubic feet. The ideal size is 1.48 cubic feet, using a slot port measuring 12-1/2" (W) x 1" (H) x 19" (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 open the box, verify contents, 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-12D4 Reviews

Average Customer Review:

14 reviews
Review this product
Great Gear Giveaway

Submit a review and then enter to win a $500 rewards card

(0)
(0)
(0)
(0)
(0)

Review this product:

Thanks for taking the time to share your experiences about this product. Please be sure to focus your comments on the product itself. Read our Review Guidelines for more information.

Your email won't be visible. Please use the email address that is associated with your order.
(e.g., JohnD) Your review will be signed using the display name and location
(e.g., Charlottesville, VA)

Click on a star to rate the overall product on a scale of 1-5
Rate the following specific attributes
  Value
 Sound Quality
 Ease of Use
 "Coolness Factor"
 Build Quality
1500 characters left
  Attach a YouTube Review
Crutchfield Video Review Guidelines
  • Only submit videos that you made or are authorized to use.
  • Do not submit videos that contain music, video or visuals that are copyrighted and belong to someone else.
  • Please see our Review Guidelines for more information.
500 characters left
500 characters left

Alpine's the best sub!!!!

Written By Dash, Eastpointe, Mi on Sunday, October 12, 2014

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

If you don't have them, better upgrade now!!!

We have got another banger!

Written By James, Horicon, Wisconsin on Friday, June 20, 2014

Crutchfield Customer Review (What's this?)

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

The alpine type R is a great speaker that is worth every penny. I myself have liked it so much iv boughten two of them.

Pros: The Alpine type R is easy to install and is very clean sounding and we can't forget how loud it is too.

Cons: With the alpine type are you may want to invest In a capacitor to prevent your battery from losing it's charge.

10 years old and still pounding like new

Written By Brad, Alliance, Ne. on Sunday, May 25, 2014

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

I can't believe some of these reviews. I've had my R12 dual 4ohm voice coils, over 10 years and it still hits hard on all different types of music. I pump it hard daily and NEVER had any problems with it.I've had them, in a sealed box. Then went to a single ported box to give it double the watts, with just the one, friends can't believe that I'm only using one of my two, until I show them.Don't let the people that have had bad luck with there's, keep you from buying a quality sub. Would I buy another without worry, YES.

Pros: Great sounding and quality built.

Cons: NONE

Amazing Bass!

Written By RC, Albany, NY on Friday, April 04, 2014

Crutchfield Customer Review (What's this?)

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

I really have no complaints. A lot of the reviewers who had bad complaints with this product didn't seem to have an amplifier to match the power of the sub. For optimal pairing, get the Alpine MRX-M110 and I doubt you will have problems with it burning out within minutes/days. Crutchfield advisors helped me out with this pairing since I wanted something with a bigger punch than the Kicker CVR 12 inch sub I had before. I swapped out the sub/amp and can't turn back now, my setup simply sounds amazing.

Pros: Durable, well-built product that delivers an astounding amount of bass to my car. I absolutely love this subwoofer and I haven't heard much better. A lot of my friends have dual sub setups, and I have just one of these (which is more than enough) providing more bass than I expected- which is never a bad thing ;)

Cons: Makes the car rattle (but seriously, what else did you expect?). You might need to invest in some Hush mat or dynomat to quiet the parts of your car that rattle from the sub.

Very disappointed

Written By Mr.Ruiz, Highland Park, California on Tuesday, March 18, 2014

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

I been doing installs for 15 years so i am very experienced. Connected this dual 4 ohm sub in 2 ohm load with a very well built alpine mrx-m55 amplifier and with in 20 minutes the sub woofer burned out while playing bass ballin. While the sub woofer worked, the bass response was phenomenal!!!! Incredible low frequency bass response. i had an alpine type E 12 inch sub in a bandpass box back in 2007. Paired it with a fosgate 600 watt amp and never had a problem with it. So I decided to try this more powerful type R but it just didn't work. Now I have to find another sub that can really handle low frequency bass at loud volume. By the way the amp gain was below 1/2 so again I don't understand what happened. Tried my friend's jl audio 12w7 sub with the mrx-m55 and it worked just fine so I know the amp was not the problem here.

Pros: Excellent bass response, very nice design, can use a grill to protect the sub which is very convenient.

Cons: Did not hhandle the 623 watts rms I threw at it with am alpine mrx-m55 amplifier. Only lasted 20 minutes. Very disappointed with alpine over the sub built quality.

Freakin Awesome!

Written By Brad, Denver, Colorado on Tuesday, December 17, 2013

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

This thing pounds HARD! I was gonna buy another one, but one is plenty!

Pros: Loud, Clean Bass

alpine swr-12d4

Written By Kevin, Newport, Arkansas on Friday, October 18, 2013

Crutchfield Customer Review (What's this?)

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

It sounded great at start but didn't with hold

Pros: Looks good soind good

Cons: Blew it

Alpine R Type

Written By T. Ski, Amarillo, Texas on Monday, October 07, 2013

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

Well not impressed at all these subwoofers lasted 3 days. I have been installing car audio for over 20 years and alpine has always put out good products(over priced) but real good stuff. these subs are just bad! I wish Boston still made the SPG-555 that is the best sub ever!

Cons: weight, price, enclosure size, power handling

Not Impressed

Written By Ryan, Sacramento,CA on Tuesday, September 24, 2013

Crutchfield Customer Review (What's this?)

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

I've been dealing with car audio for over ten years. There's lots of hype over the type R so I thought I'd give it a try. I've had Polk db, MTX 8000, Audiobahn, and Rockford Fosgates all running from the same amp over the past 10 years. The type R is "loud" because you push lots of power to it but does that make it sound good.... no. The other subs especially the Polk and MTX are much cleaner sounding and produce much deeper bass more suited for rap music. The type R has more of a punchy sound to it like you would expect when comparing a ten to a twelve. Everybody likes a different flavor but I like deep, clean, accurate powerful low bass and this didn't do it. I love alpine headunits but not their speakers.

Pros: 1000 watts rms rating and looks good.

Cons: Doesn't produce deep bass as expected.

Junk!!!

Written By Paul, Oklahoma on Saturday, August 17, 2013

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

As far as a SQ sub, this sub is ok. I wouldn't recommend throwing over 800 watts to this subwoofer. I had this sub around 6 months before it finally gave out. First issue i had with this sub about 5 months into use, was the rubber surround glue failing and seperating from the cone. Ok, easy fix. Got some CA glue and fixed the issue. Held up nice. About 2 weeks later the sub started making noises again and finally completely malfunctioned. I thought other areas of the surround were giving way. That was partially true, but hadn't fully seperated so i removed the sub from the enclosure and noticed the tinsel leads had seperated from the voice coil. I thought ok, i'll just resolder the leads, no biggie. Upon further inspection i noticed the voice coil was cracked on the inside. I could've just ordered a new coil and repaired the subwoofer, but decided i wasn't throwing anymore good money at bad junk. All in all, if you want a mediocre SQ sub go for it. If you want a loud & low daily sub that beats your chest and rattles your eyes, this IS NOT the sub for you. My advice would be to get away from the mainstreet brands like Alpine, Kicker, Rockford Fosgate etc. and look into the underground brands. There are better subs to be had for just a few more bucks that will simply blow away the afore-mentioned mainstreets. I ran this sub on the Alpine MRX-M50 & later the MRX-M110. The M50 barely pushes and the M110 i ran on low levels.

Great sub best for the money

Written By Mike, 33411 on Wednesday, June 05, 2013

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

Great sub. Sounds great hits lows highs and almost everything I can throw at it. Built a custom ported box for it to alpine specs and its worth it. Sounds great with rock country and I can really get it going flexing my windshield and annoying the neighbors. Put it this way I've been asked if I have 15s in my trunk!! Running it on a Rockford p700 down at 1ohm

Pros: Great sound Well built

Cons: Pricey if not on sale

Super sub!

Written By Justin, Chico CA on Saturday, January 26, 2013

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

I have this sub in a 2012 double cab tacoma and running on the alpine m500 and let me tell u, with the gain set at nominal which is about half way up, this thing bangs! Clean sounding bass too. Mounted it even just in a pre made fabed box (ported) 1.3 cubic feet. Sounds amazing. Trust me get this sub and u will make heads turn when u drive down the street and that's just with one! Also I would recommend just running the m500 , even though it says it can handle 1000, because trust me it supplies plenty of power and you get no distortion :) I had the type s previously but this sub like I said is amazing!

Pros: Plan and simple. Ground shaker!

Cons: None

Best sub for the price!

Written By Derek, Minnesota on Monday, August 20, 2012

Crutchfield Customer Review (What's this?)

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

You can't beat this, Alpine basically made this the type x for the price of the type r, I couldn't believe how good of a sub this is for the price!

Pros: Everything

Cons: Nothing

Impressed

Written By Brettward, Modesto, CA on Monday, August 06, 2012

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

You all might say oh great another audio noob, nah i been through my fair share. Anyways, ive been through last years model of the type R. easily underrated and they sounded very good. I had a disfunctional one and the surround came off but i had a warranty so i just got a replacement. Company said, oh we only have the new Type R and i said that was fine. I put it in, tweaked the amp settings and wow. I was really impressed just by 1 of these. I have the Rockford Fosgate t1000 bd cp and its only at 2 ohms going around ~1360 watts. The sound is super clean, and the bass is incredible for alpine. I feel bad for the type X hah. Anyways, amazing sub, a brand you know you can trust and really good quality thump. Get it and you wont be let down ;]

Pros: Looks, underrated power, fits small inclosers for those tiny cars, sound quality!

Cons: none so far

Get everything you’ll need to enjoy your new Alpine SWR-12D4

We've verified that these enclosures are a good match for this subwoofer.
It's critical to have good wire, and none is included with the sub.
Reduce ambient road noise and your vehicle's "rattles," for better sound inside your car.
Add a grille and keep your sub safe.
These can be useful if you are building a custom box.
Sound Ordnance™ Bass Bunker

Sound Ordnance™ Bass Bunker

Sealed single 12" subwoofer enclosure (Model BB12-95S)

Item #: 777BB1295S

(21)

$59.99
Add to Cart
Sound Ordnance™ Bass Bunker

Sound Ordnance™ Bass Bunker

Ported single 12" subwoofer enclosure (Model BB12-150V)

Item #: 777BB12150

(30)

$59.99
Add to Cart
Sound Ordnance™ Bass Bunker

Sound Ordnance™ Bass Bunker

Sealed dual 12" subwoofer enclosure (Model BB122-100S)

Item #: 777BB1221S

(9)

$59.99
After $20.00 Price Break Add to Cart
Sound Ordnance™ Bass Bunker

Sound Ordnance™ Bass Bunker

Ported dual 12" subwoofer enclosure (Model BB122-125V)

Item #: 777BB1222V

(17)

$79.99
Add to Cart
T-Spec 16-gauge Speaker Wire

T-Spec 16-gauge Speaker Wire

Black/white jacket — priced per foot

Item #: 120SW16WB1

(13)

T-Spec 12-gauge Speaker Wire

T-Spec 12-gauge Speaker Wire

Black/white jacket — priced per foot

Item #: 120SW12WB1

(30)

Stinger PRO Series Speaker Wire

Stinger PRO Series Speaker Wire

Priced per foot (16 Gauge)

Item #: 541SPW516B

(52)

Dynamat SuperLite Tri-Pak

Dynamat SuperLite Tri-Pak

Triple package — 3 sheets, 12 square feet (Model #10612)

Item #: 15410612

(17)

$69.99
Add to Cart
Dynamat Xtreme Trunk Kit

Dynamat Xtreme Trunk Kit

5 sheets, 20 square feet

Item #: 15419405

(14)

$169.99
Add to Cart
Dynamat 19100

Dynamat 19100

License Frame Kit

Item #: 15419100

(15)

$14.99
Add to Cart
Dynamat Xtreme Wedge Pack

Dynamat Xtreme Wedge Pack

1 sheet, 4 square feet

Item #: 15410425

(7)

$39.99
Add to Cart
Dynamat Dynaliner

Dynamat Dynaliner

One 54" x 32" sheet (1/8" thick)

Item #: 15411101

(6)

$69.99
Add to Cart
Alpine KTE-12G

Alpine KTE-12G

Grille for 12" Type-R and Type-S subwoofers

Item #: 500KTE12G

(26)

$29.99
Add to Cart
Polyester Fiber Stuffing

Polyester Fiber Stuffing

Make your subwoofer think it's in a bigger box (1-pound pack)

Item #: 027808

(36)

$12.99
Add to Cart
Metra Speaker Terminal

Metra Speaker Terminal

Round terminal cup with binding post connectors (for do-it-yourself box builders)

Item #: 120TCRB

(13)

Metra Box Carpet

Metra Box Carpet

Carpet roll (54" x 5 yards) — available in 3 colors (Black)

Item #: 120TL3015

(24)

$39.99
Add to Cart
Rubber Feet

Rubber Feet

Item #: 125F1692

(4)

Metra Speaker Terminal

Metra Speaker Terminal

Square terminal cup with binding post connectors (for do-it-yourself box builders)

Item #: 120TCSB

(7)

Corner Protectors

Corner Protectors

Item #: 1251536

(5)

Metra Speaker Terminal

Metra Speaker Terminal

Round terminal cup with spring clip connectors (for do-it-yourself box builders)

Item #: 120TCRS

(6)

Springback Handle

Springback Handle

Item #: 125H1051K

(2)

Metra Speaker Terminal

Metra Speaker Terminal

Square terminal cup with spring clip connectors (for do-it-yourself box builders)

Item #: 120TCSS

(7)

Autosound 2000 Disc One

Autosound 2000 Disc One

Low Frequency Test CD (Disc One)

Item #: 503CD101

(1)

$19.99
Add to Cart

Questions & Answers Ask the community. Share your knowledge.

3 questions already asked

I would not use it in a smaller enclosure my brother had his in a smaller box under his truck seat and it didn't have half of the sound that mine had. This is a great speaker with a lot of boom but needs a good amount of space to sound good. It is in the specs. If you look on the page I forget the exact dementions but I would go with what it says [ TRAVIS  Nov 12, 2014 ]
It depends on which thunderform you are going with. You need to check the depth the box provides for the sub compared to the actual sub depth. Airspace is another factor you should be considering. You should find out the enclosures airspace, and then find a sub with similar requirements. This will guarantee a quality sound, as well as ensuring a long lifespan for the sub. [ ALLEN  Nov 12, 2014 ]
This sub works great with a ported box. It calls for 1.5 cubic feet of space, but my box has 1.83 and it shakes the car nice. Great sub for its value/cost. I definitely recommend it! [ DYLAN ALEC  Nov 11, 2014 ]
No it's 1000 watts rms and 3000 watts peak power [ BEN  Sep 01, 2014 ]
Thanks for your question. For an amp recommendation I would recommend reaching out to an Advisor by phone or online chat. They will be able to help determine the differences and help you make the best choice for your system and your budget. [ Jeff  Dec 29, 2013 ]  Staff