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JBL MS Series MS-12SD4

12" subwoofer with dual 4-ohm voice coils

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Item# 109MS12SD4 offer details

 
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Our take on the JBL MS Series MS-12SD4

Looking for loud bass? JBL built this MS Series MS-12SD4 12" subwoofer extra tough, with features like a vented cast aluminum frame and stitched fabric surround that help this sub hit hard and last a long time. This sub works equally well in both sealed and ported enclosures, so you can achieve virtually any bass tone you want, from punishing to mellow.

Versatile and powerful
The dual voice coil (DVC) design gives you more flexibility in matching your sub system's total impedance to your amplifier, in order to get maximum efficiency and full power. And speaking of power, this sub takes up to 900 watts RMS, for performance that'll let you really feel your music's pounding beat.

Highlights:

  • 12" subwoofer with dual 4-ohm voice coils
  • polypropylene cone with stitched tri-laminate fabric surround
  • vented cast aluminum frame
  • power range: 50-900 watts RMS
  • peak power handling: 1800 watts
  • frequency response: 30-400 Hz
  • sensitivity: 87.0 dB
  • top-mount depth: 5-5/8"
  • sealed box volume: 0.95 cubic feet
  • ported box volume: 1.7 cubic feet
  • warranty: 1 year
  • Our 60-day money-back guarantee
 

Hands-on research from the Crutchfield Labs (what are the Labs?)

Features and Specs

Features and Specs
Size
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12 -inch
Impedance
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4 ohms
Cone Material
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Laminated Polypropylene
Surround Material
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Polyurethane/Fabric
Ideal Sealed Box Volume (cubic feet)
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0.95
Ideal Ported Box Volume (cubic feet)
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1.7
Port diameter (inches)
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3.94
Port length (inches)
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8.66
Free-Air
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No
Dual Voice Coil
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Yes
Sensitivity
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87 dB at 1 watt
Frequency Response
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30 - 400 Hz
RMS Power Range (Watts)
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50-900
Peak Power Handling (Watts)
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1800
Top Mount Depth (inches)
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5 5/8
Bottom Mount Depth (inches)
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N/A
Cutout Diameter or Length (inches)
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10 15/16
Vas (liters)
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47
Fs (Hz)
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37
Qts
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0.86
Xmax (millimeters)
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7
Parts Warranty
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1 Year
Labor Warranty
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1 Year

Product Research

Product Research
What's in the box?

Download owner's manual

  • 12" Dual 4 ohm voice coil subwoofer
  • Trim ring
  • Specification sheet
  • Warranty information

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.

Features

Vented Cast Aluminum Basket: The vented cast aluminum basket effectively dissipates heat to minimize distortion due to power compression.

Dual 4-ohm Voice Coils: For increased 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 wired in series, the woofer presents an 8-ohm load.

Sealed Box Volume: JBL recommends a 0.95 cubic foot sealed enclosure.

Ported Box Volume: JBL recommends a 1.7 cubic foot ported enclosure with one port, approximately 4" diameter x 8-5/8" long.

Power Handling: The woofer has two 4-ohm voice coils; each voice coil can handle 450 watts RMS (900 watts RMS total)/900 watts peak (1800 watts peak total).

 

Product Reviews

 

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Learn more about Component Subwoofers

Learn more about Component Subwoofers

Subwoofer Shopping Guide

Subwoofer Shopping Guide

Ken Nail
7/13/2008
based on 260 ratings (18 comments)
 

Subwoofers are speakers dedicated solely to reproducing low frequencies. No matter what kind of music you like, or at what volume you listen to it at, they can be a crucial part of your overall...

 
Video: How to Choose a Subwoofer

Video: How to Choose a Subwoofer

Ken Nail
9/14/2010
based on 468 ratings (23 comments)
 

The first step to choosing a subwoofer actually begins with the enclosure and how you want the sub to perform. In this video we'll tell you about the different types of subwoofer enclosures...

 
Dual Voice Coil Subwoofers

Dual Voice Coil Subwoofers

Crutchfield Writing Team
6/16/2003
based on 144 ratings (209 comments)
 

Dual voice coil subwoofers are a popular choice among car audio enthusiasts who want more flexibility in wiring their sound systems.

 
Subwoofer Enclosures

Subwoofer Enclosures

Crutchfield Writing Team
3/12/2012
based on 319 ratings (58 comments)
 

The type of bass you get from your component subwoofer doesn't depend on the woofer alone. You'll need a strong, tightly constructed enclosure for optimum subwoofer performance.

 
Tuning Your Subs

Tuning Your Subs

Buck Pomerantz
12/9/2011
based on 287 ratings (93 comments)
 

Having a subwoofer in your car is a good thing, but if the subwoofer isn't properly tuned, it won't sound as good as it should. This article describes how to adjust your amplifier so that your...

 

Accessories

Things you'll need

Sealed & Ported Boxes
Choose a sealed or ported box to house your subwoofer.
Sound Ordnance™ Bass Bunker
Sealed single 12" subwoofer enclosure (Model BB12-95S)
$59.99
In Stock
 
 
Sound Ordnance™ Bass Bunker
Sealed dual 12" subwoofer enclosure (Model BB122-100S)
$79.99
In Stock
 
 
Sound Ordnance™ Bass Bunker
Ported single 12" subwoofer enclosure (Model BB12-150V)

Also available in:
Scratch & Dent: $50.99
$59.99
In Stock
 
 
Sound Ordnance™ Bass Bunker
Ported dual 12" subwoofer enclosure (Model BB122-175V)
$79.99
In Stock
 
 
Sound Ordnance™ Bass Bunker
Ported single 12" subwoofer enclosure (Model BB12-200V)
$59.99
In Stock
 
 
Sound Ordnance™ Bass Bunker
Ported dual 12" subwoofer enclosure (Model BB122-125V)
$79.99
In Stock
 
 
Show more items

Accessories we recommend

Speaker Wire
It's critical to have good wire, and none is included with the sub.
StreetWires 12-gauge Ultra Cable™ Speaker Wire
Blue/copper jacket — priced per foot
$1.00
In Stock
 
 
StreetWires 14-gauge Ultra Cable™ Speaker Wire
Blue/copper jacket — priced per foot
$0.75
In Stock
 
 
StreetWires 14-gauge Super Cable™ Speaker Wire
Translucent blue jacket — priced per foot (Clear)
$0.99
In Stock
 
 
StreetWires 16-gauge Super Cable™ Speaker Wire
Blue jacket — priced per foot
$0.40
In Stock
 
 
Stinger PRO Series 16-gauge Speaker Wire
Black jacket — priced per foot
$0.30
In Stock
 
 
Show more items
Dynamat
Reduce ambient road noise and your vehicle's "rattles," for better sound inside your car.
Dynamat SuperLite Tri-Pak
Triple package — 3 sheets, 12 square feet (Model #10612)
$69.99
In Stock
 
 
Dynamat Xtreme Trunk Kit
5 sheets, 20 square feet
$169.99
In Stock
 
 
Dynamat 19100
License Frame Kit
$14.99
In Stock
 
 
Dynamat Xtreme Wedge Pack
1 sheet, 4 square feet
$39.99
In Stock
 
 
Dynamat Dynaliner
One 54" x 32" sheet (1/8" thick)
$69.99
In Stock
 
 
Show more items
Box Hardware
These can be useful if you are building a custom box.
Springback Handle
$9.99
In Stock
 
 
Corner Protectors
$9.99
In Stock
 
 
Rubber Feet
$5.99
In Stock
 
 
Speaker Wire Terminals
If you're building your own sub box, add speaker wire terminals for easy speaker wire connections.
Metra Speaker Terminal
Round terminal cup with spring clip connectors (for do-it-yourself box builders)
$3.99
In Stock
 
 
Metra Speaker Terminal
Square terminal cup with spring clip connectors (for do-it-yourself box builders)
$3.99
In Stock
 
 
Metra Speaker Terminal
Square terminal cup with binding post connectors (for do-it-yourself box builders)
$9.99
In Stock
 
 
Metra Speaker Terminal
Round terminal cup with binding post connectors (for do-it-yourself box builders)
$9.99
In Stock
 
 
Show more items

Extras

Test Discs
Autosound 2000 discs are designed to test specific performance parameters of your vehicle's audio system.
Autosound 2000 CD Set
$69.95
In Stock
 
 
 
Add selected to cart
 

For a more in-depth review and enhanced detailed information on the JBL MS Series MS-12SD4, please visit the Crutchfield website product page (/ISEO-rccbcspd/p_109MS12SD4/JBL-MS-Series-MS-12SD4.html ).

Recommended Accessories See more accessories

Your featured item

JBL MS Series MS-12SD4
JBL MS Series MS-12SD4
12" subwoofer with dual 4-ohm voice coils
$199.99
Out of Stock
 
 

Sealed & Ported Boxes

Sound Ordnance™ Bass Bunker
Sealed single 12" subwoofer enclosure (Model BB12-95S)
$59.99
In Stock
 
 

Speaker Wire

StreetWires 12-gauge Ultra Cable™ Speaker Wire
Blue/copper jacket — priced per foot
$1.00
In Stock
 
 

Dynamat

Dynamat SuperLite Tri-Pak
Triple package — 3 sheets, 12 square feet (Model #10612)
$69.99
In Stock
 
 

Box Hardware

Springback Handle
$9.99
In Stock
 
 

Protect your gear with an extended warranty

Add 3 Year Warranty
Square Trade Warranty
$27.99
In Stock
 
 
 
Add selected to cart
 
JBL MS Series MS-12SD4