Expert Service 1-877-289-7664 [Hours]


350W 15" GTO Series Dual 4 ohm Subwoofer

In Stock

Buy One, Get One 50% Off on JBL GTO Series Car Subwoofers View All Deals!

List price $229.95

You Save: $130.00 (56.53%)


with warranty

+ FREE Shipping in US 48

Order within 41 hrs 12 mins to ship 3/30

Arrives by Thursday, Apr. 2 to zip 07095

Add an Extended Warranty

SquareTrade Product Warranty
Fast, Free Shipping

Within the US 48

60-Day Money-Back

Hassle Free Returns

Low Price Guarantee

Seen it for less? Click here

365-Day Coverage

Warranty assistance for a year

In Stock

Arrives by Thu, Apr. 2

Get FAST answers from customers ASK a Question See questions answers

Bundled Savings with this Product


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

Buy One JBL GTO1514D Car Subwoofer at regular price and get 50% Off a second GTO1514D Car Subwoofer! Simply click the "Add Both to Cart" button. This offer cannot be combined with any other coupons or offers.







50% OFF



Special Price $49.97 ($99.95 if purchased separately)


(Offer 1 of 1)

Combined Total Price


You Save $49.98

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:

  • 15" Dual 4 ohm Grand Touring Die-Cast Series Subwoofer
  • Power Handling:
    • Peak: 1400 watts
    • RMS: 350 watts
  • Impedance: Dual 4 ohm
  • Polypropylene cone woofer
  • Rubber surround
  • Tinsel wire protector
  • Die-cast aluminum basket
  • 2" Dual 4 ohms voice coil
  • Frequency response: 23-400 Hz
  • Sensitivity: 96 dB
  • Authorized Internet Dealer
  • 1-year Manufacturer's warranty

Product History:

JBL GTO1514D thumbnail
(newest, current model)
JBL GTO1504D thumbnail
(previous model, replaced by JBL GTO1514D)

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".
96 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.
15 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.
1.5 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.
1.5 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.
3.5 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.
3.5 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.
24.90 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.
161.40 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.
1.90 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


St. Louis , Missouri

Best Bang for the buck...

March 31, 2011

It has been over a month since the install. They are just now breaking. I use 2 of them in a sealed (1.5 cubic ft per chamber) box. Matched the subs with JBL GTO 700.1 @ 2ohm. Gain is about 3/4 and bass boost less than half way. My ears hurt. They hit so hard the whole car(02 Accord 4dr) shakes so much. I get the great lows which i really wanted. I would recommend this subs to anyone. I do not have any cons so far. I will update my review in 6 months or so.

13 of 20 found this helpful

Was this review helpful to you?


Mission Viejo, CA

Vented 11.3cft, 320L Sono tube

October 5, 2014

Testing my first sonotube build on a budget for home theater. Tried the first 9 minutes of Star trek, ITD. Testing with a condenser mic it recorded .8 % of the time between 16 to 27Hz. The box was tuned to 20Hz. Infrasonic filter set to 13Hz so the cone would not surpass it's excursion. It still picked up Hz from 8 to 15. I got in trouble for playing this in my apartment. Lot of audio people say you can't use a car sub for HT. JBL has published data on the specs that is very important to the decision to purchase this sub. Before you buy a sub model it with WinISD and compare. This one comes out on top for the price and performance. The appearance and quality of the sub is excellent.

13 of 22 found this helpful

Was this review helpful to you?


gallatin, TN

I love this sub

December 16, 2012

I have had mine for about 2 months now. At first i received the singe voice coil version by mistake but i was able to ship it back fast and no cost to me (thanks sonic!)

But anyway, i running 450 rms to it and i think it could handle at least 500. But even though i have it wired to 2 ohms i measured it with my multi-meter and its reading about 2.8. I know its not going to be exactly 2 ohms but 2.8 seems a bit high to me so im not possitive its getting a full 450 watts rms. But for what it is getting it sounds pretty darn good. My amp is what is limiting it because it clips but im getting a new amp soon so it should be alot louder! I got this on sale but i think it is worth the regular price.
I also have it in the ported Sonic box and although i think it needs to be bigger for better lows, it sounds pretty good.

12 of 20 found this helpful

Was this review helpful to you?



jbl gto1514d

August 20, 2010

Bought theses a while ago and still hitting hard as b4, nice product, neighbors hear me coming and i only have a 1800watt amp and a 2farad cap...

12 of 21 found this helpful

Was this review helpful to you?


Palestine, TX

Very Impressed

March 23, 2015

I recently purchased two of these woofers for use in a small room EDM application. I mounted them in single 1.5 cu. ft. boxes and am running them in series at 8 ohms and have 800 watts of power going to each one. They pound the walls roof and floor quite well. I couldn't imagine how nice they would sound in a car? One would be sufficient, two would probably foam bile up your throat if you where driving a sub compact car! Just make sure you look for the RMS wattage on your amp and don't skimp on power!!!

1 of 2 found this helpful

Was this review helpful to you?


Flag, Az

HOme speaker

March 22, 2015

These speakers worked great for our in-home system. We did not want anything that would be too loud and these were perfect. Installation was very easy.

0 of 0 found this helpful

Was this review helpful to you?


Kansas CityRaytown, MO

nice subwoofer

August 1, 2012

I had two of these subwoofers and they really pound. I had them in a sealed enclosures and it was still shaking everything. This is a nice entry level subwoofer. Would reccomend this to anyone that us just getting into car audio.

7 of 14 found this helpful

Was this review helpful to you?


Portland, OR

Great subwoofer

June 4, 2013

I have had this sub for about 8 months and have had no problems at all. When i bought it it was only like $130 but now its $199. For what i paid it cant be beat. I also have 2 Memphis PR 15's and this JBL has much better sound quality. But for $200 i would probably buy a Type R. This sub is great though dont get me wrong. I have it in a ported Sonic sub box from this website as well. If it had a bigger box it would sound much better in my opinion.

Also i had about 400 watts going to it with my old amp and i knew it could take more so when i got my new amp i had it hooked up by its self getting about 700-800 watts and it took it well but it was definatly maxing out but no distortion. Great sub JBL

7 of 15 found this helpful

Was this review helpful to you?


Bentonville, AR

Awesome sub!

September 1, 2011

I just bought this sub and gotta say it is CRUSHINN! Had some JBL's about 6yrs ago and they were good then and they HIT still. For the price this is a hella deal. I've got in a ported custom box built to make my trunk area flush and its awesome. will definitely buy more of these. awesome product!! A++++

and this company will answer all ur questions about the sub and wiring suggestions. very helpful.

9 of 20 found this helpful

Was this review helpful to you?

Repair Studio and DJ Equipment 347-463-5990

Brooklyn, New York NYC, No bench fee

JBL 15 Inches Woofer

January 23, 2015

Anyone looking for a four ohms fifteen inches woofer for a car, home or professional audio installation this is a good woofer to install.

8 of 20 found this helpful

Was this review helpful to you?


Portville, NY

Early bird gets the worm.

January 7, 2015

First off. It says JBL right on the dust cap. It's beautiful and massive. I want to give a good review. But I don't have cons. It sounds deep rattles everything that gets in it's way and is not gonna cr*p out anytime soon. Runnin it on a 900 watt pioneer amp and it isn't a power hungry beast. Well my lights dim very badly but it is a fifteen. If you don't love bass please get the 12 of this series. This is for bass heads only.

10 of 24 found this helpful

Was this review helpful to you?

Accessory Tools and Products

Accessories added

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 $94.95

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

40" x 15 Ft Piece of Premium Un-Backed Automotive Trim Carpet

Durable design for long life-span, available in many colors and shades.

Your Price $39.99

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

Xscorpion 9-Piece Nylon Plastic Pry and Chisel Tool Set

Easily removes dash/trims, door clips, panels and pins, rubber grommets and vehicle emblems.

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

15" Protective Waffle Metal Subwoofer Grille

Keep your subwoofer looking amazing while keeping it safe with its durable metal construction!

Your Price $6.99

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 GTO1514D Subwoofer

Mono Amp

2 Channel Amp - Bridged

2 JBL GTO1514D Subwoofers

Mono Amp

Mono Amp - Option 1

2 Channel Amp

2 Channel Amp - Bridged

4 Channel Amp - Bridged

3 JBL GTO1514D Subwoofers

Mono Amp

4 Channel Amp

4 JBL GTO1514D Subwoofers

Mono Amp

2 Channel Amp

2 Channel Amp - Bridged

4 Channel Amp

Browse 4 questions and 14 answers
Hide answersShow all answers | Sort by
Why did you choose this?
Sonic Electronix Store
Good for the car and home. At 2 for $150, how could i resist?
Daniel M on Mar 19, 2015
seems like it'll be super duper loud! My mom hates my loud music so she finally allowed me to upgrade my 5" :D
Benito O on Mar 13, 2015
I like JBL
Bob R on Mar 16, 2015
because I had them before in my other car and the sound is great
luis s on Mar 13, 2015
Best amp to hook it up to ? rms ratings and brand ?
A shopper on Jan 15, 2015
Best Answer: I hooked mine up to my Crossfire VR402. Bridged its 400 watts and it hits hard. You can probably find one online. But really any amp between wattage of 300-400 should be fine for this sub. As for the brand, it's pretty much a "you get what you pay for" thing. I bought this amp for $100 and its fantastic.
Reply · Report · Davie M on Jan 16, 2015
· Add Answer · I Have This Question Too (0)
Do you all ship to the Bahamas?
Rt Honourable R on Mar 12, 2015
Best Answer: Yes.
Reply · Report · Customer SStaff on Mar 12, 2015
· Add Answer · I Have This Question Too (0)
What box should I get for 2 jbl gto 15s?
Jacob F on Nov 15, 2014
Best Answer: Hello Jacob,

The JBL GTO1514D calls for A LOT of Air Space, 3.5ft^3, so a custom enclosure would be the best option. The closes we can get with a Pre-Fab enclosure, will be the Atrend 15DVR.
Atrend 15DVR-BLACK
Atrend 15DVR-BLACK
Reply · Report · Customer SStaff on Nov 16, 2014
· 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 GTO1514D

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