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Alpine SWS-12D4

500W Type-S 12" Dual 4-Ohm Subwoofer

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List price $169.95

$99.99

with warranty

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General Features:

  • 12" Dual 4-Ohm Type-S Series Car Subwoofer
  • Power Handling:
    • Peak: 1500 watts
    • RMS: 500 watts
  • Impedance: Dual 4 ohms
  • Kevlar treated pulp cone
  • Durable HAMR Santoprene™ surround
  • High strength steel frame
  • Progressive conex
  • 2.6" Voice Coil
  • 64oz. Strontium Ferrite magnet motor structure
  • Frequency response: 26-200 Hz
  • Resonance Frequency (Fs): 34Hz
  • Top-mount depth: 6-3/8"
  • Sensitivity: 86.2dB
  • 1-year Sonic Electronix Warranty

Product History:

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

Subwoofer Specifications

Subwoofer Series
Each subwoofer manufactured is part of a series. This is the name of the subwoofer's series.
Type-S (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.
2.6"
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).
26 - 200 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".
86.5 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.
15 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.
Black
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 Reinforced Pulp (Paper)
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.
Single Stacked
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.
No
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.
0.65 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.
1.00 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.
1.0 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.
1.5 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.
5-7/8"
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.
10-9/16"
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.
34 Hz
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.
44 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.
0.57
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.
0.6
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.
7 ohms
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.
9.43

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
75%
4 Star
21%
3 Star
0%
2 Star
0%
1 Star
4%

Average Attribution Rating

Durability
4.8
Value
4.7
Features
4.7
Design
4.7
Usability
4.8
Keesh

Aurora, IL

Overall
Durability
Value
Features
Design
Usability
Wonderful

September 29, 2012

I have 2 of these in a sealed box connected to a Hifonics HFi1500D amp and they are amazing. They pound real hard. I could't have gotten better subs for this price. I recommend these 100%.

1 of 1 found this helpful

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Ty

Two Rivers, WI

Overall
Durability
Value
Features
Design
Usability
Amazing

June 23, 2014

This product can bump. I love mine. In fact I'm getting 2 of them. Hook them up to a sl 2000 watt amp and there beautimus. I love this sub. And I recommend it for people who absolutely love base.

0 of 0 found this helpful

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RBASS

Chicago, IL

Overall
Durability
Value
Features
Design
Usability
LOVE IT!

March 14, 2014

Awesome Sub, it's cheap here but in most places its a 200 dollar sub with tax so it's not a cheap sub at all. It slams i have one in aported box in a 98 bravada and people think i have two its so loud cant wait to get another!

0 of 0 found this helpful

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AGirlandherWoofers14

Marinette, WI

Overall
Durability
Value
Features
Design
Usability
Great Woofers for the Price! Very Pleased!

February 12, 2014

I bought two of these woofers and before i had time to break them in they were already working better than i expected. I am a music fanatic and i have dealt with systems before these and nothing can compare. These woofers are AMAZING! I couldn't be happier with them. They pound and work with any kind of music. Country music is even better with these subs playing. I would highly recommend these, for the price, you cannot go wrong.

0 of 0 found this helpful

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coachmack

chicago , il

Overall
Durability
Value
Features
Design
Usability
ok but not great

February 8, 2014

I got two of the sws- 12d4 with hifonics brutus 2000.1d two sets of kenwood kfc-x184c 6.5 components with tweeters on 4ch autotek ahl 1050.4 with autotek crossover system is hella clear i cant complain one bit im mean like they in the truck singing and playing instruments.....the bass hits hard but not as hard as it needs to cause the highs and mids are the strength to this system hits hard but i still want more bass deeper lows maybe ill just add 2 more since i was told the amp can handle 4.

0 of 0 found this helpful

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Cody

Sevierville, TN

Overall
Durability
Value
Features
Design
Usability
Omg

January 29, 2014

I have two of the old version of these hooked up to a 2000w SPL amp and they pound so hard the hole car flexes (prolly gonna break a window soon).

0 of 0 found this helpful

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Rob

Prattville, AL

Overall
Durability
Value
Features
Design
Usability
Great sub for the price

January 15, 2014

I have this sub in a custom built box tuned to alpine's specs and I can't believe how good it sounds. It almost sounds like I have two 10's. I highly recommend this sub.

0 of 0 found this helpful

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Flying Fat man

Phoenix Az

Overall
Durability
Value
Features
Design
Usability
Awesome

December 26, 2013

These subs are great for the price and hit hard.

0 of 0 found this helpful

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Grassman

Baton Rouge, Louisiana

Overall
Durability
Value
Features
Design
Usability
Awesome Sound, Great Price

December 23, 2013

This is my first pair of Alpine subs and they sound awesome! I have them in a ported box with a JL500/v2 amp. You can feel the bass. I am glad I bought them.

0 of 0 found this helpful

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Derek

Overland Park, KS

Overall
Durability
Value
Features
Design
Usability
I LOVE ALPINE SUBWOOFERS!!

September 24, 2013

I got this sub because it fit in my price range and I knew it was a good brand and I was familiar with them as well. I couldn't have picked a better sub for this price!! I absolutely love this sub! I love it so much I got my sister a type-E! Hoping one day to upgrade to a type-R, when I got the money. But this sub is GREAT VALUE! Looks awesome! 5 stars!

0 of 0 found this helpful

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Parker

Fargo, ND

Overall
Durability
Value
Features
Design
Usability
Like an R!

September 21, 2013

Pushes air, bumps like an R. Handles ample amount of power. Has that SIGNATURE ////Alpine sound (Yes alpine subs bump a certain way) 5* good job.........

0 of 0 found this helpful

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DREW

North Charleston, SC

Overall
Durability
Value
Features
Design
Usability
Alpine SWS-12d4

September 18, 2013

It hits hard and clean. I love it for the fact of not only can it keep up with the double bass drum of my metal/hardcore, but it delivers that low end bass for rap and dubstep.

0 of 0 found this helpful

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Traci

moriarty nm

Overall
Durability
Value
Features
Design
Usability
great speakers

August 28, 2013

My husband is one of the pioneers of car audio systems he built a box with correct air space ported and tune. the sound is incredible

0 of 0 found this helpful

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Beware the twig

Dallas, TX

Overall
Durability
Value
Features
Design
Usability
Review

July 30, 2013

Good solid product. Good thumpage and decently priced. So yes, but, don't buy. It is you decision.

0 of 0 found this helpful

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Sporty

San Diego, CA

Overall
Durability
Value
Features
Design
Usability
Great Subs Sound Amazing.

June 12, 2013

i have two of these bad boys in a sealed box with a RE Audio 1000.1 amp wired down to a 1ohm load and man these guys BEAT! I definitely recommend this product.

0 of 0 found this helpful

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ginger

valparaiso

Overall
Durability
Value
Features
Design
Usability
if you cant decide what subs you want and dont wNt to pay over 400 bucks get these

March 5, 2013

i have had these subs now for about six months Just got a capacitor for it and it sounds great. I bought both of these subs for about $200 great price. At B*** B** they are $*** each. So I'm hundred bucks off not bad. I wire these subs down to 1 ohm to a hifonic hfi1000d amp This app is perfect because it runs at 1000 RMS. I highly recommend you get a capacitor 1.5 fraud is good. I love them I Highly recommend them

0 of 0 found this helpful

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Randall

Birmingham, AL

Overall
Durability
Value
Features
Design
Usability
Satisfying recomendation

March 4, 2013

I ordered these subs. I have 2 in a ported box and they hit so so so hard these are the best subs ive owned for that low price. I have them running on a Lanzar Optidrive 2001D Amp wit a 0 guage kit. Thanks Sonic Electronix. P.S. Im thinkin about gettin 2 more but wifey wont let me. LOL

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Jeffrey

Durham, NC

Overall
Durability
Value
Features
Design
Usability
I love this sub

March 2, 2013

I love this sub I love the sound that it puts out in my bassworx ported box was worth the money.

0 of 0 found this helpful

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T Wilson

Wa

Overall
Durability
Value
Features
Design
Usability
Good buy

January 7, 2013

Would recommend. No problems to report whatsoever. Great for my metal music. Doesn't hit the most hard for your dubstep or whatever but that doesn't detract for me! No cons. All pros.

0 of 0 found this helpful

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tyler3721

tennessee chattanooga

Overall
Durability
Value
Features
Design
Usability
best subs

December 28, 2012

I had 2 of these in my galant in both ported and sealed boxes and with a ported box they hit hard i also had an orion monoblock 3000 watt amp pushin both of them but i fried a wire to one and fried the other sub so now iv got 2 type r's on their way but these subs were amazin so i would recomend these to anyone wantin a hard but budget system just dont put too many watts to them lol

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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

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

Spring Post Terminal Cup

Makes adding a spring post terminal to an enclosure simple! Banana clip ready!

Your Price $3.99

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 $12.99

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

Alpine KTE-12G

12" 2-Piece Grille for Alpine Subwoofers

Your Price $24.99

12" Protective Waffle Subwoofer Grille

Keep your subwoofer looking amazing while keeping it safe.

Your Price $4.99

Impedance Meter / Signal Generator

Easy to locate tuning frequencies of passive radiators and ported enclosures

Your Price $299.99

1 Alpine SWS-12D4 Subwoofer

Mono Amp

2 Channel Amp - Bridged

2 Alpine SWS-12D4 Subwoofers

Mono Amp

Mono Amp - Option 1

2 Channel Amp

2 Channel Amp - Bridged

4 Channel Amp - Bridged

3 Alpine SWS-12D4 Subwoofers

Mono Amp

4 Channel Amp

4 Alpine SWS-12D4 Subwoofers

Mono Amp

2 Channel Amp

2 Channel Amp - Bridged

4 Channel Amp

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Product Summary

Manufacturer

Model Number

SWS-12D4

UPC

793276011848

Weight

15.00lbs

Internal SKU

sws12d4

Internal Product ID

45529

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 SWS-12D4