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350W 12" GTO Series Single 4 ohm Subwoofer

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Buy One, Get One 50% Off on JBL GTO Series Car Subwoofers

Buy One JBL GTO1214 Car Subwoofer at regular price and get 50% Off a second GTO1214 Car Subwoofer! Simply click the "Add Both to Cart" button. This offer cannot be combined with any other coupons or offers.







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JBL Audio Store

Grand Touring Series

Ever wonder what a high quality subwoofer sounds like? Now you not only hear one, but own one too. These affordable subwoofers are built with die-cast aluminum frames to ensure durability of the product. The Butyl Rubber surround provides a tone of bass that sounds superior to most others. The Polypropylene woofer cone provides the loudest and highest quality punch on every note. When properly powered, these hungry speakers will extend deep into the audible frequencies for an even presence of your low end bass. Get yours now and you will not regret it!

The Sound of quality

Sonic Electronix, one of the leaders in car audio, recently visited Harman, the premium global audio and infotainment group, at their research and development locations in Northridge, California and Detroit, Michigan. The purpose of these visits was to utilize and combine the powerful brand of Harman and the industry leading knowledge behind Sonic Electronix to begin working together on developing future car audio projects.

General Features:

  • 12" Single 4 ohm Grand Touring Die-Cast Series Subwoofer
  • Power Handling:
    • Peak: 1400 watts
    • RMS: 350 watts
  • Impedance: Single 4 ohms
  • Polypropylene cone woofer
  • Rubber surround
  • Tinsel wire protector
  • Die-cast aluminum basket
  • 2" Single 4 ohms voice coil
  • Frequency response: 23-400 Hz
  • Sensitivity: 90 dB
  • Authorized Internet Dealer
  • 1-year Manufacturer's warranty

Product History:

JBL GTO1214 thumbnail
(newest, current model)
JBL GTO1202D thumbnail
(previous model, replaced by JBL GTO1214)

Subwoofer Specifications

Subwoofer Series
Each subwoofer manufactured is part of a series. This is the name of the subwoofer's series.
Subwoofer Size
Refers to the diameter of the subwoofer, measured in inches.
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.
1400 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.
350 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.
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.
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).
23 - 400 Hz
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".
90 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.
14.50 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.
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.
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.
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.
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.

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
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.
1.0 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.
1.0 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.
1.75 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.
1.75 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.
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.
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.


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.
28 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.
58.20 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.
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.
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.
3.76 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.

Warranty and Return Policy

Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider

Summary of Customer Ratings & Reviews

Rating Distribution

5 Star
4 Star
3 Star
2 Star
1 Star

Average Attribution Rating


New Smyrna Beach, FL

great punch

February 8, 2010

Purchased two of these jbl’s 6 months ago for the back of my Bronco and I couldn’t be happier. Six months of bouncing and banging around and they still sound great.

6 of 10 found this helpful

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granbury, Tx

Good Stuff

March 28, 2009

I bought 2 of these subs about 6 months ago and i am still happy with them. running them with the jbl 7001 amp (700rms) and it sounds awesome

8 of 14 found this helpful

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Fort Smith, AR

Serious boom, Very versatile

May 1, 2014

Honestly, these GTOs scare the crap out of me. They will get LOUD and they can handle anything you throw at them. I have mine in a ported box, and at first I didn't like it, but once you get the amplifier straightened up, you will not regret it. Grab a 751EZ amp from JBL and you will experience some serious, loud bass. I only wish I could turn the subs around, because the magnet and basket are beautiful and you can just tell this sub was built to the highest quality. I've known people to keep earlier models of the GTO for 8-10 years

6 of 11 found this helpful

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great subs

April 7, 2010

Great poundin' subs... I love em... Get em.. You wont be disappointed .. Im pumping 450 watts into 2 of em, and they easily take the power... Thanx Sonic guys.

9 of 17 found this helpful

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Boston, MA

Great sub at an affordable price.

January 14, 2015

Great sub for the money. It is well made and weights quite a bit. Bought two that are being powered by a JL 500/1 and these subs pound; super loud and powerful, while not even being pushed hard at all.

Very happy with this purchased. Thanks Sonicelectronix

5 of 10 found this helpful

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July 30, 2014

These subs shake the hell out of my truck. These subs can take a royal beating. They are in a sealed enclosure with one cubic foot per side. (boarder between the subs) under my back seat (2003 Sierra extended cab) hooked up at 2ohms with the JL Audio XD600/1 which is 720rms dynoed. I would recommend these subs to anyone. I would NOT call this a "budget sub" just a great sub and price. one of the best in my opinion for its power range.

6 of 12 found this helpful

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Well worth it.

December 31, 2014

It sounded good out of the box and better as it breaks in. Very nice.

4 of 10 found this helpful

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queensbury, NY

Good sub

July 20, 2011

Awesome quality sub. I have it on a 400w amp and have never had distortion and it's deffinately never blown. Good sound quality also.

6 of 15 found this helpful

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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 $29.99

Single 12" Ported Enclosure Custom Black Baffle

Gold Binding post terminals and a high quality 5/8" MDF construction.

Your Price $59.99

12" Medium Sealed Subwoofer Enclosure

CARB Compliant, 3/4" MDF Sealed Enclosure Lined with Premium Carpeted Finish

Your Price $47.95

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 $9.99

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

Gold Plated Dual Terminal Banana Plug Connector

Enables an expandable, secure connection accepting up to 8 gauge wire.

Your Price $1.99

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

Car Stereo and Speaker Installation Tool Kit

Includes Test Light, Crimp/Splice Tool, Multi-bit Screwdriver and more.

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

1mm All Purpose Solder

Solder is all purpose for use on most projects where solder is needed.

Your Price $8.99

12" Protective Waffle Subwoofer Grille

Keep your subwoofer looking amazing while keeping it safe.

Your Price $4.99

Scosche SPL Meter

Monitor the noise level of your new car audio system with this SPL meter measuring from 60-135 dB.

Your Price $21.99

1 JBL GTO1214 Subwoofer

Mono Amp

2 Channel Amp - Bridged

2 JBL GTO1214 Subwoofers

Mono Amp

2 Channel Amp

4 Channel Amp - Bridged

3 JBL GTO1214 Subwoofers

4 Channel Amp

4 JBL GTO1214 Subwoofers

Mono Amp

Mono Amp - Option 1

2 Channel Amp

2 Channel Amp - Bridged

4 Channel Amp

Browse 2 questions and 5 answers
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Why did you choose this?
Sonic Electronix Store
Great reviews, JBL is a trusted name, and great price!
Chris T on Feb 15, 2015
it works best with my amp
julie w on Jan 30, 2015
I'll use these subwoofers for a home theater application. I did some research in the net in forums related to that topic and almost everybody described this item as affordable but with really nice specs for that application. These subs have a really nice construction in both efficiency and cosmetic aspects so I decided for these ones as a budget driver. These along with the Behringer iNuke NU1000DSP and a pair of ported 8 ft3 DIY cabinets tuned to 20 Hz will rock the budget DIY subwoofer market!
Luis R on Feb 4, 2015
I've heard nothing but good things about the gto line of subwoofers and couldn't pass up the price. In my carefully planned system these should fit the bill perfectly.
chris p on Nov 28, 2014
ok i just got 2 of theses single gto 1214 in a package deal with the JBL MS-A5001. how would i hook them up for both subs will be 2 ohms each? do i do it like the wiring guide says run one speaker wire to the other subwoofer then run a single speaker wire to the amp or do i hook them both to the amp?
Peter A on Feb 18, 2015
JBL 2-GTO1214_MS-A5001
JBL 2-GTO1214_MS-A5001
Best Answer:

this a very easy to follow and understand diagram.
Reply · Report · Jeason V on Feb 20, 2015
· Add Answer · I Have This Question Too (0)

Product Summary


Model Number






Internal SKU


Internal Product ID


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: JBL GTO1214

  • Harman International: The Pursuit of Great Sound
  • Subwoofer Size Buying Guide