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JBL MS-12SD4

12" Dual 4 ohm MS Series Car Subwoofer

  • 4.7

(3 reviews)

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$239.95

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$199.95

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The New Sound of JBL: MS Series Subwoofers

Introducing the JBL MS-12SD4 car subwoofer. This MS series subwoofer from JBL is brand new for 2011 and offers an excellent balance of value and performance. As can be expected with any audio product boasting the JBL name, the MS-12SD4 is dedicated to high performance sound. The subwoofer has been carefully engineered and constructed with the right materials. The face of the subwoofer features a polypropylene cone attached to a laminated polyurethane/fabric surround with adhesive and two sets of stitching. The aluminum basket is light and nonferrous, which dedicates more magnetic power to the motor assembly. The dual voice coils offer greater flexibility and wiring options. This MS series subwoofer is the perfect solution for both sealed and ported boxes. Get higher quality bass with JBL!

  • 12" Dual 4 ohm MS Series Subwoofer
  • Power Handling:
    • Peak: 1800 watts
    • RMS: 450 watts*
  • Impedance: Dual 4 ohm
  • Polypropylene cone material
  • Laminated polyurethane and fabric surround
  • Vented pole piece
  • Designed for both sealed and vented enclosures
  • Aluminum frame with black epoxy coating
  • 2-1/2" Copper voice coil with Kapton former
  • 56 oz. Barium ferrit magnet structure
  • Silver-plated push terminals
  • Frequency response: 30-400 Hz
  • Sensitivity: 87 dB
  • Authorized Internet Dealer
  • 1-year Manufacturer's warranty

Sonic Electronix, Inc. can only ship JBL products within the United States of America.

Subwoofer Specifications
Subwoofer Series MS
Subwoofer Size 12"
Peak Power Handling 1800 watts
RMS Power Handling 405 watts
Voice Coil(s) Dual
Impedance (Per Voice Coil) 4 ohms
Voice Coil Diameter 2"
Frequency Response 30 - 400 Hz
Sensitivity 87 dB
Xmax (millimeters) 7 mm
Subwoofer Design Round / Circle
Main Cone Color Black
Woofer Composition Polypropylene
Woofer Surround Poly Coated Cloth
Magnet Structure Single Stacked
Subwoofer Grille No
Re-Cone Kit Available No
Recommended Enclosure Specifications
Recommended Enclosure Type Ported / Vented
Sealed
Minimum Sealed Box Volume 0.95 cubic feet
Maximum Sealed Box Volume 0.95 cubic feet
Minimum Ported Box Volume 1.7 cubic feet
Maximum Ported Box Volume 1.7 cubic feet
Top-Mount Depth 6-3/4"
Cutout Diameter 10-15/16"
Shallow Mount Installation No
Electromechanical Parameters
Free-Air Resonance (Fs) 37 Hz
Equivalent Compliance (Vas) 47 liters
Total Speaker Q Value (Qts) 0.86
Electrical Q Value (Qes) 0.93
Electrical Resistance of Voice Coil (Re) 7.7 ohms
Mechanical Q Value (Qms) 10.45
Warranty and Return Policy
Return Policy Standard Return Policy
Parts Warranty Duration 1 year
Labor Warranty Duration 1 year
Warranty Provider Manufacturer
Customer Review Summary for JBL MS-12SD4
Average Customer Rating is 4.7 out of 5 stars:
  • 4.7
based on 3 Reviews
Share your thoughts with others:
Rating Distribution:
5 star:
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67%
4 star:
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33%
3 star:
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what's this?
Average Attributes Rating:
Durability
  • 4.3
4.3
Value
  • 4.7
4.7
Features
  • 4.7
4.7
Design
  • 4.0
4.0
Usability
  • 4.7
4.7
what's this?
Most Helpful Customer Reviews:
March 3, 2013 Great Sub
Review by
John from Cincinnati, OH
Overall
  • 4.0
Durability
  • 4.0
Value
  • 4.0
Features
  • 4.0
Design
  • 3.0
Usability
  • 4.0
Hits pretty hard. I have had it for about a year and no troubles.



Con's: I don't particularly like the chrome "JBL" emblem, but I can live with it.
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March 18, 2012 Great!!!
Review by
Noel from St. Cloud, FL
Overall
  • 5.0
Durability
  • 5.0
Value
  • 5.0
Features
  • 5.0
Design
  • 5.0
Usability
  • 5.0
I just bought two of these subs to replace my 10 year old Infinity Reference 12" subs. One of them came unglued from the surround. I was originally just going to get two more of the newer Infinitys but after reading that it was a common problem, I decided to pick up the JBLs to keep it in the Harmon family. Let me start by saying that I have professionally installed car audio for over 5 years. While these are no Gti, they definitely pound. For the price they can't be beat. These are great subs that get low in a very small enclosure. I currently have them in a .85 cubic foot fiberglass enclosure that were originally made for the Infinity subs. They sound so much better than the infinity subs and I haven't had the chance to retune the system to accommodate the new JBLs. Sonic did a great job with the emails and tracking info and the package came in exactly when they said. Overall I am extremely happy with the product and the service. Great job Sonic Electronix. I will definitely be shopping here again.
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March 11, 2012 Awesome Sub - Great Price
Review by
Ben from KY
Overall
  • 5.0
Durability
  • 4.0
Value
  • 5.0
Features
  • 5.0
Design
  • 4.0
Usability
  • 5.0
Me: 25, professional, college graduate, musician

I listen to a variety of music (not just bass crazy rap or electro.)



JBL has never let me down with any products - from my loudspeaker monitors and surround speakers to my father's huge old school set from the '70's that still sound amazing - JBL is all about precision performance with durability.



I put this speaker in the sealed 1.0cf sonic sub box, running at 2ohms 1000+w rms Kicker DX1000.1. It sounds so good, and it's not even broken in yet! (less than 5hr playing time). It replaced an older Kicker L5 in a huge ported box.



I wasn't happy with the sound from the L5 setup. Sloppy bass with music that had quick beats, and the frequency sweet spot was just overbearing and hard to tune from amp/head unit. I like deep, accurate and punchy bass and this sub has so far delivered more than even my expectations.

Right out of the box I can tell this is a better sounding sub than the Kicker, and it takes up half the space!



The sub isn't flashy with flames, crazy grill design, bright colors or chrome. It's a minimal design that looks clean and unassuming, but I can tell that it is built very well and it can hit LOW and keep up with fast punches in the trunk of my Maxima.



Yes, you might get something that's louder with a 50lb magnet and shake your car to pieces. But you'll probably lose SQ unless you spend 3x the $ or more. I got my sub and box for a great price and I get a grin every time the bass drops. Thanks Sonicelectronix for hooking me up so well with all my purchases!
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Subwoofer Grilles
Protect your subwoofer while making your enclosure look great! These subwoofer grilles are the perfect addition to your new subwoofer.
  Product Price Add?
12" Universal Subwoofer Grille 12" Universal Subwoofer Grille
Protect your subwoofer with this aluminum grille that is simple to install.
$18.99
Speaker Wire
Choose from our recommended speaker wire to hook up your amplifier to your new subwoofer. The higher quality of speaker wire that it used for this connection, the better your subwoofer will sound.
  Product Price Add?
15 ft. of 12 AWG StreetWires Speaker Wire 15 ft. of 12 AWG StreetWires Speaker Wire
This SuperCable from StreetWires is a noise free link between your amplifier and your subwoofer.
$24.99
20 ft. of 12 AWG Kicker Speaker Wire 20 ft. of 12 AWG Kicker Speaker Wire
Kicker uses twisted pair technology and hyper-flex cable to provide you with the cleanest sound and a simple installation.
$39.95
Sound Dampening Material
Get the most sound out of your new subwoofer with some high quality sound dampening material. It will keep the road noise out and the music inside the car.
  Product Price Add?
Dynamat Rubber Roller Dynamat Rubber Roller
Install your Dynamat with ease! This heavy duty rubber roller is designed specifically to install your Dynamat!
$18.99
Dynamat Extreme Bulk Pack Dynamat Extreme Bulk Pack
36 ft. Dynamat Xtreme Bulk Pack enhances the sound for your entire car!
$159.99
Enclosure Accessories
These accessories are designed to help you build the custom enclosure that you have always wanted, or add to the box that you already bought. Either way, these products can assist you in achieving better sound, better looks, and more bass!
  Product Price Add?
20 oz. Bag of Poly-Fil 20 oz. Bag of Poly-Fil
Polyester fiber fiberfill adds better bass to your system.
$5.99
16 oz. Can of Adhesive Spray 16 oz. Can of Adhesive Spray
Spray adhesive used for adhering carpet to subwoofer boxes without bubbles.
$5.99
Binding Post Terminal Cup Binding Post Terminal Cup
Use this to easily install a binding post terminal to your subwoofer enclosure.
$4.99
Banana Clip Terminals Banana Clip Terminals
These high grade banana clips allow you to plug into your banana clip ready terminal for a secure connection.
$4.99
Installation, Tools & Accessories
Don't forget to get the tools and accessories that will help you install your new subwoofer in your vehicle. Whether you opt for the professional installation card or the do-it-yourself method, you will need the following to help you out!
  Product Price Add?
Car Stereo and Speaker / Subwoofer Installation Tool Kit Car Stereo and Speaker / Subwoofer Installation Tool Kit
Includes Test Light, Crimp/Splice Tool, Multi-bit Screwdriver and more.
$14.99
System Optimization and Tuning
Use these items to assist in testing and tuning your new car audio system to perfection!
  Product Price Add?
Scosche SPL Meter Scosche SPL Meter
Monitor the noise level of your new car audio system with this SPL meter measuring from 60-135 dB.
$24.99
AutoSound 2000 CD-101 AutoSound 2000 CD-101
Low frequency test CD
$12.99
AutoSound 2000 CD-102 AutoSound 2000 CD-102
High frequency test CD specifically designed for the set-up and evaluation of sound system imaging and placement.
$12.99
AutoSound 2000 CD-103 AutoSound 2000 CD-103
Audiophile reference series test disc for evaluation of all audio components.
$12.99
Main Product
  Product Price Add?
JBL MS-12SD4 JBL MS-12SD4 $199.95
Related products
JBL MS-12SD2
12" MS Series Subwoofer • Dual 2 ohm • 1800W Peak • 450W RMS • Polypropylene Cone • Polyurethane/Fabric Surround • Sealed and Vented Enclosures • Aluminum Frame • 56 oz. Barium Ferrit Magnet

For more information on wiring subwoofers, visit our Subwoofer Wiring Guide: Subwoofer Wiring Guide

Product Summary

Manufacturer: JBL
Model number: MS-12SD4
Product manual: Download the JBL MS-12SD4 Product Manual
UPC: 050036312660
Weight: 14.00 lbs
Internal SKU: ms12sd4
Internal product ID: 39487