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Alpine SWR-1242D

12" Dual 4 ohm Type-R Series Car Subwoofer

Discontinued
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This item has been discontinued

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swr1243d thumbnail

Alpine SWR-1243D

OUR PRICE: $169.95

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Shop Alpine Car Audio Alpine Type R Subwoofers

These incredible subwoofers from Alpine have withstood the test of time and proven themselves to be one of the top subwoofer choices for car audio enthusiasts. The Type R subwoofers are designed and engineered for big bass, as well as a durable sub that will last for many years to come. These woofers use a pulp cone that is reinforced with Kelvar for an incredibly durable and rigid structure. The ribbed multi-roll santoprene surround is designed for excellent response, while assisting in smoother cone movement and excursion. The subwoofer will stay cool under extended hard playing with the unique thermal management system that Alpine designed into the Type R Subwoofer. The tinsel leads are hidden and woven into the dual Nomex spiders for a strong and unbreakable connection. For those looking for an industry standard subwoofer with break-taking bass, consider the Alpine Type-R subwoofer.

  • 12" Dual 4 Ohm Type R Series Subwoofer
  • Power Handling:
    • Peak: 1500 watts
    • RMS: 500 watts
  • Impedance: Dual 4 ohms
  • Parabolic Kevlar reinforced pulp fiber cone woofer
  • High Amplitude Multi-Roll (HAMR) Santoprene surround
  • HAMR Surround integrates a concealed mount gasket for Alpint Type-R grille
  • Custom Cast Aluminum Frame with Integrated Perimeter Venting and Heat Transfer Plate
  • Cast aluminum perimeter vented heat transfer frame
  • Compound Radius Curve (CRC) Motor structure
  • Spiral cut aluminum former with high temperature DVC Winding
  • Radial Vented VC Heat sink and Airflow Management System
  • Mirrored progressive Nomex Spiders with reinforced layer integrated tinsel leads
  • Insert push terminals with one-sided layout
  • One-sided terminal layout
  • 1-year SonicElectronix.com warranty

Read more about the Alpine SWR-1242D in our blog!

Alpine products are warranted solely by Sonic Electronix, Inc. under the same period and terms as the original Alpine warranty. Sonic Electronix is not an Authorized Alpine Dealer and Alpine requires all merchandise purchased by Sonic Electronix customers to be returned solely to Sonic Electronix. Alpine products are also covered by our Standard Return Policy for returns on exchanges or refunds within 30 days from the date of purchase.

Product History:

Alpine SWR-12D4 thumbnail
(newest, current model)
Alpine SWR-1243D thumbnail
(previous model, replaced by Alpine SWR-12D4)
Alpine SWR-1242D thumbnail
(previous model, replaced by Alpine SWR-1243D)
Alpine SWR-1241D thumbnail
(previous model, replaced by Alpine SWR-1242D)

Subwoofer Specifications

Subwoofer Series
Each subwoofer manufactured is part of a series. This is the name of the subwoofer's series.
Type-R (Alpine)
Subwoofer Size
Refers to the diameter of the subwoofer, measured in inches.
12"
Peak Power Handling
Peak power handling refers to the amount of power a speaker can handle during a brief musical burst. The RMS power range figure is a much more reliable rating for determining the speaker's power requirements. The Peak power handling specification is typically rated per speaker unless otherwise noted.
1500 watts
RMS Power Handling
The RMS power is the amount of power the speaker requires to operate safely and properly. RMS Power Handling refers to the amount of power a speaker can handle on a continuous basis. We recommend powering your speakers or subwoofer with 80%-120% of its recommended RMS rating. The RMS power handling specification is typically rated per speaker unless otherwise noted.
500 watts
Voice Coil(s)
Dual voice coil subs have more wiring flexibility than single voice coils subs; however, single voice coil subwoofers provide easier hookup options for wiring multiple subwoofers in parallel or series. You may also run a dual voice coil (DVC) sub in parallel, series, or combination. A quad voice coil has four voice coils and is equal to two dual voice coil subwoofers as far as wiring goes.
Dual
Impedance (Per Voice Coil)
The load value (in ohms) that the speakers present to the amplifier per voice coil - the amount of resistance to the current flow. This is a key specification as subs wired in parallel or low impedances can create problems with your amplifier and potentially void all warranties. We encourage you to ask our support department prior to purchase if you do not understand which impedance level will suit your application best.
4 ohms
Voice Coil Diameter
Diameter of voice coil, usually measured in inches.
Frequency Response
The range of frequencies the speaker will reproduce (lowest frequency to the highest). Bigger is better, meaning the wider the range, the better. The optimal range is 20 - 20,000 Hz (which is the range of human hearing).
23 - 500 Hz
Sensitivity
An efficiency or sensitivity rating tells you how effectively a speaker converts power into sound. The higher the number, the more efficient the speaker and the louder it will play with the same input power. An efficient speaker helps you maximize your available power. Most sensitivity ratings measure the speaker's output with 1 watt of input, 1 meter from the speaker. Some speakers' sensitivity is measured with 2.83 volts of input, instead of 1 watt.
 
Efficiency (1w/1m) is not an accurate indicator of a subwoofer's output capability and should not be used as a comparison to other speakers or subwoofers to determine which one is "louder".
85 dB
Xmax (millimeters)
Typically measured in millimeters, the Xmax value is the measure of a speaker cone's maximum excursion in one direction while maintaining a linear behavior.
18.2 mm
Subwoofer Design
This is the design of the subwoofer or the opening of the subwoofer enclosure. Each design has it's own benefits, whether it is a square, circle, or oval.

Round/Circle: This is the typical and common subwoofer design. They have a round cone and are a circle in design.

Square: These woofers are able to achieve a greater cone area in a smaller space. Because of the greater surface area, some square subwoofers will be louder than a round subwoofer of the same size.

Round / Circle
Main Cone Color
This is the color of the speaker's or subwoofer's cone.
Dark Gray
Woofer Composition
Lightweight woofer cone materials are essential for efficient operation. Poly cones produce exceptional sound and are sturdy against various changes in temperature. Paper cones are very efficient, and when treated for moisture resistance, will perform at a high level. Poly refers to polypropylene, which is thermoplastic or fibers that are polymers of propylene. IMPP refers to injection molded polypropylene, a commonly used process and material in speakers.
Kevlar Fiber
Woofer Surround
A speakers surround is part of the suspension system. The surround protects the cone and prevents it from being displaced as it flexes out from the basket. It is usually made of a durable material like treated foam or rubber in order to withstand the strenuous job of producing bass frequencies.
Santoprene Rubber
Magnet Structure
Defines the overall structure of the subwoofers magnet.
Subwoofer Grille
Most subwoofers are able to accommodate a universal grille; however, some subs include a grille and others have a specific, optional grille available for purchase separately. If "yes", then the subwoofer includes a grille. If "optional (sold separately)" the matching grille will need to be purchased in addition to the sub.
Optional (Accessory required and sold separately)
Re-Cone Kit Available
Some higher end subwoofers have replaceable cone assemblies. In case of a blown woofer, a recone kit allows for a simple replacement, as opposed to purchasing an entire new subwoofer.
No

Recommended Enclosure Specifications

Recommended Enclosure Type
This is the recommended type of enclosure that the subwoofer should be installed into. Some subwoofers are specially designed for particular enclosures.

Sealed: These enclosures completely enclose the air inside the box. These boxes produce a tight bass.

Ported/Vented: These enclosures have a slot of air to escape from the box. The result is a sound that has more "boom".

Bandpass: These are a combination of both sealed and ported enclosures. They can be very efficient, but require tuning for the best response.

Ported / Vented
Sealed
Minimum Sealed Box Volume
This value indicates the minimum sealed box volume that the manufacturer recommends for the subwoofer. The volume is typically displayed in cubic feet.
0.57 cubic feet
Optimum Sealed Box Volume
This value indicates the ideal sealed box volume that the manufacturer recommends for the subwoofer. The volume is typically displayed in cubic feet.
Maximum Sealed Box Volume
This value indicates the maximum sealed box volume that the manufacturer recommends for the subwoofer. The volume is typically displayed in cubic feet.
1.0 cubic feet
Minimum Ported Box Volume
This value indicates the minimum ported box volume that the manufacturer recommends for the subwoofer. The volume is typically displayed in cubic feet.
0.75 cubic feet
Optimum Ported Box Volume
This value indicates the ideal ported box volume that the manufacturer recommends for the subwoofer. The volume is typically displayed in cubic feet.
Maximum Ported Box Volume
This value indicates the maximum ported box volume that the manufacturer recommends for the subwoofer. The volume is typically displayed in cubic feet.
2.0 cubic feet
Top-Mount Depth
The depth when installed on top of the mounting surface. Measured from the bottom of the speaker's magnet to the bottom of the mounting holes on the rim of the speaker.
7-3/4"
Cutout Diameter
The actual diameter of the hole you will need to cut out if you are creating a new mounting location for this speaker, or if you are mounting a subwoofer in a box.
11"
Shallow Mount Installation
This means that the subwoofer/speaker is designed to be installed in areas that do not have a lot of space. Shallow mount subwoofers are typically found under a seat or behind the seat in some trucks.

Shallow mount speakers will typically have a mounting depth of 2" or less, while shallow mount subwoofers will typically have a mounting depth of 3" or less.

No

Electromechanical Parameters

Free-Air Resonance (Fs)
The free-air resonance frequency of the subwoofer, measured in Hz. At this frequency the weight of the moving parts is perfectly balanced with the subwoofers suspension system.
Equivalent Compliance (Vas)
This is the amount of air that has the same stiffness as the subwoofers suspension. The greater the rating, the lower the stiffness and larger recommended enclosure. It is measured in Liters.
Total Speaker Q Value (Qts)
This is the subwoofers relative damping (Q) at the resonance frequency (Fs), including all dimensionless losses. Essentially, a high Qts value (closer to 1.0) means the subwoofer is great for sealed enclosures and a low Qts value (closer to 0) means the woofer is great in vented enclosures. A Qts of around 0.45 means the woofer will work decently in either enclosure type.
Electrical Q Value (Qes)
The subwoofers relative damping (Q) at the resonance frequency (Fs), including electrical losses. Also called the mechanical damping of the subwoofer. The unitless measurement usually varies from 0.5 10.
Electrical Resistance of Voice Coil (Re)
Amount of DC resistance of the subwoofer when measured with an ohm meter. Typically, this will read less than the impedance rating of the subwoofer.
Mechanical Q Value (Qms)
This is the subwoofers relative damping (Q) at the resonance frequency (Fs), including mechanical losses. Also called the mechanical damping of the subwoofer. This unitless measurement usually varies from 0.5 10.
Efficiency Bandwidth Product (EBP)
This number represents the trade off between having an efficient woofer and one with a wide bandwidth. To calculate this number, take the Fs and divide it by the Qes. If the number is below 50, the woofer is designed for a sealed enclosure only. If it's between 50-100 it can be used in either. Lastly, if it's greater than 100 it's designed for vented enclosures.

Specials with this Item

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Warranty and Return Policy

Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider
Sonic Electronix

Summary of Customer Ratings & Reviews

Rating Distribution

5 Star
85%
4 Star
13%
3 Star
2%
2 Star
0%
1 Star
0%

Average Attribution Rating

Durability
4.9
Value
4.9
Features
4.8
Design
4.8
Usability
4.9
Marquis

Salters, SC

Overall
Durability
Value
Features
Design
Usability
Great Sub

September 19, 2011

I've Had this sub for a year and its been great so far no problems to speak of. About to get a second one cant wait.

2 of 2 found this helpful

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DJ After Hours

Phoenix, AZ

Overall
Durability
Value
Features
Design
Usability
Greatest Investment Ever.

April 22, 2010

OMG! Ive been in the car audio game for two years. Over the years ive had everything from cheap to expensive, one to four subs, ported sealed all of that... Finally decided play with the big boys and get nothing but the best.

Super Duper Bass. I have just one in a ported box paired with the Rockford Fosgate Prime R500-1. Perfect Combination. If U Only Want One Get This Pair! Wont B Disappointed.

2 of 2 found this helpful

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josh

BRIMFIELD, IL

Overall
Durability
Value
Features
Design
Usability
Strong subwoofer

August 26, 2014

Great strong subwoofer...i have 4 of these in a 3rd order box and ran a mrp-m2000 them at 2 ohm. they took the power all day never got warm or had excersion issues. Great sub for beginner car audio competitors.

0 of 0 found this helpful

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Mubiana

Zambia

Overall
Durability
Value
Features
Design
Usability
sound was never meant to be seen!!

November 7, 2011

I have had this speaker for a year now with no problems. Truly it hits harder!!

0 of 0 found this helpful

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CM%

Omaha,NE

Overall
Durability
Value
Features
Design
Usability
Loud

September 18, 2011

I have one of these in a vented enclosure and it bumps so hard!

0 of 0 found this helpful

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cesar

las vegas, NV

Overall
Durability
Value
Features
Design
Usability
Alpine all the way

August 1, 2011

This is the second subwoofer i have owned (previously had Polk DB) and im happy i got these. I'm running one type r off a kenwood 1800 amp at 4 ohms pushing 500 rms in a ported box. I love how it can take a beating playing for hours. I have had this for over a year and a half now and no complaints! Makes my pontiac g5 2009 rattle!!
Sonic has the best price and the best customer service... and dont forget FREE shipping and fast !

0 of 0 found this helpful

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ken

federal way , WA

Overall
Durability
Value
Features
Design
Usability
very nice !!

June 12, 2011

i would definately recomend these subs and this site to my friends :)

0 of 0 found this helpful

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Terry

Cochran, GA

Overall
Durability
Value
Features
Design
Usability
Great Value

June 3, 2011

Good quality. Can't beat Alpine.

0 of 0 found this helpful

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Kabir

Rochester, NY

Overall
Durability
Value
Features
Design
Usability
Amazing Sub

May 23, 2011

Great quality subwoofer. I have this hooked up to a RF Prime amp and it hits hard. Have yet to see any Cons with this sub. Shakes the whole car but sound is definitely high quality as well.

0 of 0 found this helpful

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george

stoughton, MA

Overall
Durability
Value
Features
Design
Usability
type r

March 18, 2011

This is the best sub I have ever had it has great sound and can handle what ever you can throw at it

0 of 0 found this helpful

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Big D

Kiln,MS

Overall
Durability
Value
Features
Design
Usability
Best sub for the price.

January 17, 2011

I have been into car audio for 20 years. I have owned many types of subs(all name brands)all have been in sealed boxes(I like the sound)so that is what my review is on.All of my car's have been about sound quality not about db.I have 2 of these subs each in a 1.2 cf box,In a 1972 Cutlass convertible with a 1000 watt amp pushing them @ 1ohm. These subs are LOUD and sound great!(with the top down and even better with it up). I think these are the best sub for the price and will out play subs that cost much more. i have had the subs running for a year and they get better every day.

0 of 0 found this helpful

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chris

moore, OK

Overall
Durability
Value
Features
Design
Usability
sounds good in my single cab

January 13, 2011

I have 2 12" dual 4 ohm in my truck in a custom box I made, internally braces and sealed all the way around. Even though this box was made to specs and solid as a rock I wish they could go a little deeper. But for what I payed these are great and they still hit deep enough to shake windows when I pull up somewhere. Overall this woofer is very versatile and sound good when in the right box.

0 of 0 found this helpful

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Allison

Riverside, RI

Overall
Durability
Value
Features
Design
Usability
Great sound but one of mine already blew :(

December 29, 2010

Bought these 6 months ago and had them professionally installed. Sound great but one of them already blew. Definitely a disappointment there.

0 of 0 found this helpful

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Dbo

P-ville Texas

Overall
Durability
Value
Features
Design
Usability
Type R

December 28, 2010

I bought this sub about 6 months ago. At first, I had it running on the stock amp (about 60w rms) in my Cobalt, enclosed in a 1.25 ft^3 sealed box. As one could imagine, it just wasn't loud enough, so I bought a ported box (also from this site) and added a Fosgate amp. I am a guy who enjoys his low notes, and the Type R delivers great low end response! Overall this is a quality product (as is everything Alpine has made) and Sonic is the best site to buy from. I would highly recommend this sub! Combine it with a good 500w amp in a ported box, and you will NOT be sorry.

0 of 0 found this helpful

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Matthew

East Moriches, NY

Overall
Durability
Value
Features
Design
Usability
Great Woofers!

December 22, 2010

these are such clean subwoofers. have it hooked up to a 1000 watt hifonics amp. Great Subs

0 of 0 found this helpful

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Mr. BiGGz

Sacramento, CA

Overall
Durability
Value
Features
Design
Usability
Alpine type r great sound for great price

December 20, 2010

got this a few months ago for a good price. lows on this subs is clear and deep. running it with alpine cda117 head unit and alpine mrp-m500 mono amp at a stable 2ohms. the thing about this sub is you can't just go out and buy a cheap prefab box, you need to get a box built to its specs to get the full use out of the sub otherwise your system will sound like crap and you can even ruin the sub. spent $250 just to have the box built to its specs. overall great sound for great price.

0 of 0 found this helpful

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Shannon

Centerton, AR

Overall
Durability
Value
Features
Design
Usability
great!!!

December 19, 2010

for the price this subwoofer is really hard to beat. great sq and has some good spl too. hits the lows very well without any distortion. this is one of my favorites.

0 of 0 found this helpful

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Toady

Memphis, TX

Overall
Durability
Value
Features
Design
Usability
Best Bang For Buck

December 12, 2010

Can't go wrong with these subs, get very loud

0 of 0 found this helpful

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Alex

Columbus, NE

Overall
Durability
Value
Features
Design
Usability
Best beat for your buck

December 11, 2010

Me and two other friends have pairs of these. All of us have different amps and no matter how many watts or what kind of amp you hook them up to you get great quality and volume. The only thing I didn't like was that the cut out diameter isn't 11in. Kinda messed up my custom box I made but other than that these subs are amazing! Would recommend to anyone!

0 of 0 found this helpful

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Aaron

Joelton, TN

Overall
Durability
Value
Features
Design
Usability
Great Sub

December 7, 2010

Best 12" out there in my opinion. Pair it with the right amp and box and you have more than you need without it getting sloppy.

0 of 0 found this helpful

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Accessory Tools and Products

Accessories added

Single 12" Subwoofer Angled Truck or Hatchback Box Enclosure

CARB Compliant, 5/8" MDF Shallow Sub Enclosure Lined with Polyfil.

Your Price $34.99

NVX 25 ft. of True Spec 12 Gauge Speaker Wire

100% OFC wire with EnvyFlex metallic jacket insulates and protects against damage from extreme conditions.

Your Price $39.99

25 ft. of Streetwires 12 Gauge Speaker Cable

You'll need speaker wire to hook up that new subwoofer!

Your Price $44.95

Belva 23 ft. of 12 Gauge Speaker Wire

Ultra-flexible PVC blended jacket for easy installation.

Your Price $14.99

20 Square Feet of Sound Dampening Material

NVX Sound dampening is thicker than competitors, eliminates rattles and gives you bigger bass!

Your Price $59.99

Dynamat Sound Dampening Trunk Kit

Did you know sound dampening will reduce those annoying rattles and even increase your SPL?

Your Price $109.95

Stinger Sound Dampening Trunk Kit

Stinger's Roadkill sound dampening series is sure to kill unwanted road noise and rattles! Enough sound dampening for your whole trunk!

Your Price $69.99

12 oz. Can of Adhesive Spray

Spray adhesive used for adhering carpet to subwoofer boxes without bubbles.

Your Price $6.99

40" x 15 Ft Piece of Premium Un-Backed Automotive Trim Carpet

Durable design for long life-span, available in many colors and shades.

Your Price $39.99

Gold Plated Dual Terminal Banana Plug Connector

Enables an expandable, secure connection accepting up to 8 gauge wire.

Your Price $1.99

Car Stereo and Speaker Installation Tool Kit

Includes Test Light, Crimp/Splice Tool, Multi-bit Screwdriver and more.

Your Price $14.99

Xscorpion 9-Piece Nylon Plastic Pry and Chisel Tool Set

Easily removes dash/trims, door clips, panels and pins, rubber grommets and vehicle emblems.

Your Price $14.99

Cordless Multi-Functional Heat Tool Soldering Iron Kit

Continuous working lock allows you to work without holding down trigger.

Your Price $79.99

4 Ft of 1/4" Thick Black Heat Shrink Tubing

Provides abrasion resistance and added protection for your cables.

Your Price $3.99

2" Universal, Professional Heavy Duty Roller for Sound Damping/Dampening

Universal rubber roller to make it easy to install sound dampening.

Your Price $7.99

1mm All Purpose Solder

Solder is all purpose for use on most projects where solder is needed.

Your Price $8.99

12" Protective Waffle Subwoofer Grille

Keep your subwoofer looking amazing while keeping it safe.

Your Price $4.99

Scosche SPL Meter

Monitor the noise level of your new car audio system with this SPL meter measuring from 60-135 dB.

Your Price $21.99

Impedance Meter / Signal Generator

Easy to locate tuning frequencies of passive radiators and ported enclosures

Your Price $299.99

1 Alpine SWR-1242D Subwoofer

Mono Amp

2 Channel Amp - Bridged

2 Alpine SWR-1242D Subwoofers

Mono Amp

Mono Amp - Option 1

2 Channel Amp

2 Channel Amp - Bridged

4 Channel Amp - Bridged

3 Alpine SWR-1242D Subwoofers

Mono Amp

4 Channel Amp

4 Alpine SWR-1242D Subwoofers

Mono Amp

2 Channel Amp

2 Channel Amp - Bridged

4 Channel Amp

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Product Summary

Manufacturer

Model Number

SWR-1242D

UPC

793276620781

Weight

27.00lbs

Internal SKU

swr1242d

Internal Product ID

4281

Sonic Electronix Wiring Guide

Wiring Diagram Legend

Warning: The image depicted shows the resistance change when wiring multiple subwoofer terminals. Please refer to your subwoofer's owner's manual for the proper wiring of its terminals. Sonic Electronix, Inc. is not responsible for damage caused to your audio system or vehicle due to improper installation. Please call tech support at 1-877-289-7664 if you require additional assistance.

Product Name: Alpine SWR-1242D