Garage
Shop

Customer Ratings & Reviews


JBL MS-12SD4 thumbnail image
View product page

5 star
67%
4 star
33%
3 star
0%
2 star
0%
1 star
0%



Durability
4.4
Value
4.7
Features
4.7
Design
4
Usability
4.7

Customer Reviews

Sort by:

Loading...

Great Sub

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.

By John on March 3, 2013

13 found this helpful


Great!!!

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 I currently have them in a .85 cubic foot fiberglass enclosure that were originally made for the Infinity subs.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.

By Noel on March 18, 2012

9 found this helpful


Awesome Sub - Great Price

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!

By Ben on March 11, 2012

7 found this helpful


Save up to 10 different vehicles in your garage
Vehicle
Store
Delete

2012 Ford Expedition

2009 Kia Optima

2011 Nissan Maxima

2018 Mazda CX-3

2008 BMW M3

2003 MINI Cooper

1998 Suzuki Esteem

1986 Dodge Omni

2008 Ford Ranger

2008 Lexus GX470

Add vehicle Clear all vehicles
Where to find vehicle info
Are you sure you want to clear your garage?
This action cannot be undone. Confirm
This page was not designed for products.
If you continue, you will be redirected to a category customized for your vehicle. Continue
Loading...
Identify your vehicle and submodel details
  • Owner's manual
  • Vehicle's insurance card
  • Vehicle registration
  • Vehicle produced after 2005: Inside driver's side door
  • Vehicle produced before 2005: Rear passenger doorjamb, glove box, center console, or engine compartment
Car Info Side Door Icon
Vehicle Registration Icon
Vehicle Insurance Icon

Modern vehicles often require specific brackets, wiring harnesses, and mounting solutions. A fit guide ensures:

  • You see only parts engineered for your exact vehicle
  • You avoid incompatible radios, speakers, or wiring
  • Installation is smoother, faster, and frustration-free
  • You get the correct accessories the first time

Whether you're replacing a factory stereo or upgrading your entire audio system, the Fit Finder eliminates uncertainty.