Alpine Type-S SWS-12D4

1500W Peak 12" Type-S Series Dual 4-Ohm High Performance Subwoofer

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• 1500W Peak
• 500W RMS
• Dual 4-Ohm Voice Coil
• Kevlar Treated Pulp Cone
• Durable HAMR Santoprene Surround

Learn more about the sws12d4

Good news and a little bad...

This item has been discontinued

But you may be interested in the newest model that's available.

sw12d4 thumbnail

Alpine S-W12D4

OUR PRICE: $199.95

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Product Highlights

• 1500W Peak
• 500W RMS
• Dual 4-Ohm Voice Coil
• Kevlar Treated Pulp Cone
• Durable HAMR Santoprene Surround



Authorized dealer

General Features:

  • 12" Type-S Series Car Subwoofer
  • Power Handling:
    • Peak: 1500 watts
    • RMS: 500 watts
  • Recommended power range: 150 - 500 watts RMS
  • Impedance: Dual 4 ohms
  • Kevlar treated pulp cone
  • Durable HAMR Santoprene surround
  • High strength steel frame
  • Progressive conex
  • 12" Protective 2-Piece Subwoofer Grille Available, sold separately:
  • 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
  • Authorized Internet Dealer
  • 1-year Manufacturer's Warranty

PROP 65 WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer or birth defects or other reproductive harm. Wash hands after handling. For more information, visit

Product history:

Alpine S-W12D4 thumbnail
(newest, current model)
Alpine SWS-12D4 thumbnail
(previous model, replaced by Alpine S-W12D4)
Alpine SWS-1243D thumbnail
(previous model, replaced by Alpine Type-S 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 Wiring Guide

Wiring Guide to Wire 1 Alpine Type-S SWS-12D4 Subwoofer

Mono Amp

2 Channel Amp - Bridged

Wiring Guide to Wire 2 Alpine Type-S SWS-12D4 Subwoofers

Mono Amp

Mono Amp - Option 1

2 Channel Amp

2 Channel Amp - Bridged

4 Channel Amp - Bridged

Wiring Guide to Wire 3 Alpine Type-S SWS-12D4 Subwoofers

Mono Amp

4 Channel Amp

Wiring Guide to Wire 4 Alpine Type-S SWS-12D4 Subwoofers

Mono Amp

2 Channel Amp

2 Channel Amp - Bridged

4 Channel Amp

Specifications & Details

Subwoofer Specifications
Type-S Series
Subwoofer Size
Peak Power Handling
1500 watts
RMS Power Handling
500 watts
Voice Coil(s)
Impedance (Per Voice Coil)
4 ohms
Voice Coil Material
Voice Coil Diameter
Frequency Response
26 - 200 Hz
86.5 dB
Xmax (millimeters)
15 mm
Subwoofer Design
Round / Circle
Main Cone Color
Woofer Composition
Kevlar Reinforced Pulp Paper
Woofer Surround
Santoprene Rubber
Magnet Structure
Single Stacked
Magnet weight
Magnet Type
Subwoofer Grille
Re-Cone Kit Available
CTA-2031 Compliant
Recommended Enclosure Specifications
Recommended Enclosure Type
Ported / Vented
Minimum Sealed Box Volume
0.65 cubic feet
Optimum Sealed Box Volume
0.75 cubic feet
Maximum Sealed Box Volume
1.00 cubic feet
Minimum Ported Box Volume
1.0 cubic feet
Optimum Ported Box Volume
1.25 cubic feet
Maximum Ported Box Volume
1.5 cubic feet
Top-Mount Depth (Mounting Depth)
Cutout Diameter
Shallow Mount Installation
Electromechanical Parameters
Free-Air Resonance (Fs)
34 Hz
Equivalent Compliance (Vas)
44 liters
Total Speaker Q Value (Qts)
Electrical Q Value (Qes)
Electrical Resistance of Voice Coil (Re)
7 ohms
Mechanical Q Value (Qms)
What is in the box?
Other Accessory #6
Warranty and Return Policy
Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider

Item Details


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Product and How-to Videos

Customer Ratings & Reviews

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if you cant decide what subs you want and dont wNt to pay over 400 bucks get these

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

By ginger on March 5, 2013


found this helpful.

best subs

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

By tyler3721 on December 28, 2012


found this helpful.

alpine type s

Great packing fast shipping no problems sounds great iam happy with it

By b on January 22, 2015


found this helpful.


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!

By Derek on September 24, 2013


found this helpful.


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.

By Ty on June 23, 2014


found this helpful.


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

By Beware the twig on July 30, 2013


found this helpful.

I love this sub

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

By Jeffrey on March 2, 2013


found this helpful.

ok but not great

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.

By coachmack on February 8, 2014


found this helpful.


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).

By Cody on January 29, 2014


found this helpful.

Like an R!

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.........

By Parker on September 21, 2013


found this helpful.


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