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5-1/4" 2-Way GTO Grand Touring Series Coaxial Car Speakers

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List price $139.95

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with warranty A Pair

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Arrives by Friday, July 3 to zip 07095

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Special Price $14.99 ($19.99 if purchased separately)


• Eliminates Road Noise
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• Simple To Install
• Easy To Form Aluminum
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• One 18" x 32" Piece

(Offer 1 of 1)

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JBL Store

Professional JBL Sound: GTO528

With the long history of professional audio equipment manufactured my JBL, it is no surprise that the Grand Touring Series (GTO) produce some of the finest sound available for car speakers. By integrating the majority of JBL's top car speaker technology, these speakers are able to effectively deliver truly stunning audio, while keeping the price affordable for everyone. For those that are looking for a quality car speaker that will not only sound great, but also keep more money in your pockets. Put your trust in JBL and these Grand Touring Series speakers.

Tweeter-Level Adjustment with Unipoint:

The tweeters on the GTO series speakers are an excellent example of JBL's advanced technology. Made from My/Ti (Mylar and Titanium composite), the tweeters offer a higher power handling, greater efficiency, and reduced distortion. To direct that sound where you want, JBL has designed a Unipoint rotating tweeter pod that allows the tweeter to be directed towards the listener. This results is better imaging and a more accurate sound stage. To top of the tweeter technology, JBL engineered a tweeter-level control switch that adjusts the tweeter dB output. This allows for more sound adjustments after the speaker is installed.

The Sound of quality

Harman Tour

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:

  • 5-1/4" Grand Touring Series 2-way Car Speakers
  • Power Handling:
    • Peak: 270 watts per pair / 135 watts each
    • RMS: 90 watts per pair / 45 watts each
  • Plus One cone material
  • Mylar/titanium composite dome tweeters
  • Frequency response: 90-20,000 Hz
  • 2 ohms impedance
  • Sensitivity: 90 dB
  • Cutout dimensions: 4-3/4"
  • Top-mount depth: 2"
  • Authorized Internet Dealer
  • 1-year Manufacturer's warranty

Priced Per Pair

Product History:

JBL GTO529 thumbnail
(newest, current model)
JBL GTO528 thumbnail
(previous model, replaced by JBL GTO529)
JBL GTO527 thumbnail
(previous model, replaced by JBL GTO528)

Speaker Specifications

This is the manufacturer product line of speakers.
Priced Per
Car Speakers are typically sold in pairs so you will receive 2 speakers for each speaker purchase on speakers marked "Priced Per Pair". If a speaker is marked "Priced Per Each" then the speaker is sold individually and each purchase you make will result in 1 speaker. High-powered tweeters, midrange and full-range pro audio for car speakers are typically sold per each speaker.
Speaker Size
Refers to the size of the speaker measured in inches. Every vehicle has standard application sizes. Please use our vehicle fitment guide for your vehicle's specific speaker sizes if you do not know them.
The number of individual drivers in a car speaker. Speakers with 2 drivers are known as a 2-way, and 3 drivers are known as a 3-way. Component systems are often referred to as "separates" because the tweeter is not attached to the midwoofer (main speaker driver) and mounts separately in a location such as a door post. Component systems typically come with an external crossover so you can easily adjust the high and low frequencies sent to both the midwoofer and the tweeter. Center channel speakers are great for those looking to have surround sound in their vehicle.
Tweeter Design
Designs such as cone, dome, semi-dome, balanced dome, and whizzer are most popular. Cone tweeters are simple, efficient and typically are the most reasonably priced. Dome tweeters are used in most home speakers, and provide a smoother and more accurate sound. Semi-dome design is one with a dome placed inside a cone. A Balanced dome driver is a semi-dome with equal reproduction area given the cone and dome portions of the driver. A whizzer tweeter is a separate tweeter cone driven by the voice coil of the woofer.
Tweeter Composition
Materials such as polypropylene, silk, cloth, and paper are the most common, where as many more recent tweeters are now manufactured with composites such as Aluminum, Titanium, Mylar, and other materials.

PEI is an acronym for "Polyetherimide" which is an amorphous, amber transparent, high-performance thermoplastic.

Mylar/Titanium Hybrid
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.
Plus One
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.
135 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.
45 watts
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
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).
90 - 20,000 Hz
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.
2 ohms
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.

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 Dimensions
Refers to the dimensions of the hole, measured in inches or millimeters, required to contain the speaker.
4-3/4" x 4-3/4" 
Speaker Grilles
A grating or screen of metal or plastic bars or wires, mounted in front of a speaker as protection. If yes, the speakers will include matching speaker grilles. If no, there are no grilles included.
Number of Speakers
This is the number of speaker that is included in the package. Each purchase will result in receiving the number of speakers indicated here. Please note that some items will have multiple woofers in the same enclosure. For sets of component speakers, this number will refer to the number of sets of speakers (For example, 2 would indicate the purchase includes 2 woofers and 2 tweeters).

Please refer to the product image and description for further details about the speaker.

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




December 8, 2014

These are simply hands down the best little speakers I've heard. They're unparalleled in fidelity, both treble and bass, even at very high volumes. They provide more bass, in fact, than I thought little 5-1/4's could. I'm more a treble guy though as classic rock is my forte and no doubt they deliver. Especially considering the price, they're a no brainer purchase. You will like the way it sounds. I guarantee it.

18 of 27 found this helpful

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hiram, GA

great product

August 11, 2014

They sound awesome and I am enjoying them.I would recommend them.

12 of 19 found this helpful

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Rockingham, NC

Good little speaker

March 22, 2014

I bought these speakers for the rear of my single cab ram 1500. Sound quality is pretty good, but are drownded out by front 6x9 in doors. May be a better speaker in a different location or setup.

11 of 18 found this helpful

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Excellent Fronts

January 12, 2012

JBL is an excellent choice for any speaker demands and I chose these to complement my Infinity 6x9 that I installed in the rear of my Grand Prix with a new Kenwood Headset. Excellent sound quality all round!

8 of 12 found this helpful

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Nice speakers

June 16, 2014

This is the second pair of speakers besides the GTO938 I bought and mounted in a friend's truck. Sounds really good for the price but again I don't see any reason for putting a 0dB / -3dB switch for the tweeter since you'll equalize from the source in a much finer manner.

7 of 13 found this helpful

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Valencia, CA

Great for the price

January 23, 2014

These JBL speakers are a significant improvement over the stock speakers I had in my Ford Transit Connect. The sound is clearer and cleaner, musical instruments sound better, bass is much improved. The speakers do get a little screamy at very high volume, but otherwise I'm very happy.

8 of 15 found this helpful

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One word : Amazing!

July 17, 2012

Great value, great sound. What more can I say? Everybody can hear my speakers a mile away!

7 of 13 found this helpful

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new tazewell, TN

good bang for the buck

January 14, 2014

Great improvement over stock Harley-Davidson speakers, even without having an amplifier.

8 of 16 found this helpful

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Blue Knight

Moretown, VT

Great Value

July 6, 2014

I used these to re-place my front speakers in my Can-Am Spyder motorcycle. Since they are 2 ohm speakers they have effectively doubled the power of my head unit ( which is stock and cannot be replaced ). I can now play music quite loud if I choose to ( sometimes necessary on a MTC. ) without loss of clarity.

7 of 15 found this helpful

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Houston, TEXAS


December 29, 2013

I like them and can't hear the sound for the price. Installed in a civic hatchback and definitely boosted the driving experience! Sounds is a lot better than my Kenwood in my other Civic.

5 of 11 found this helpful

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Selden NY

Not too bad

January 2, 2014

I am using these as a rear fill. I have them amped (80rms) and crossed over at 100hz. I originally tried 80hz, but they distorted a little bit at loud volumes. From 100hz and above, these speakers sound good. They are an excellent value.

5 of 12 found this helpful

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Accessory Tools and Products

Accessories added

Streetwires 50 ft. of True Spec 16 Gauge Speaker Wire

You need speaker wire to connect your speakers!

Your Price $29.99

Belva 23 ft. of True Spec 16 Gauge Speaker Wire

100% Copper Clad Aluminum, PVC blended jacket for easy installation and high strand count for maximum audio quality

Your Price $12.99

16-14 AWG Butt Connectors

These blue butt connectors are ideal when connecting thicker speaker wire your new aftermarket speakers!

Your Price $4.99

16-14 AWG Blue T-Tap Adapters

Allows for fast and easy splicing of wires by easily tapping into the cable.

Your Price $4.49

16-14 AWG Quick Disconnect Connectors

These blue quick disconnect connectors make it easy to connect and disconnect speaker wire your to your new aftermarket speakers!

Your Price $7.99

Dynamat Xtreme Speaker Kit 10415

Enough sound dampening for 2 speakers!

Your Price $17.95

Car Stereo and Speaker Installation Tool Kit

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

Your Price $16.99

Universal Wire Puller & Grabber

Running wires has never been easier! This wire puller allows you to run wires through those hard to reach places!

Your Price $6.99

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

Xscorpion WDCR2 Window and Door Clip Remover

Removes and installs handle and window crank clips.

Your Price $6.99

3 in 1 Wire Quick Splice T-Tap and Butt Connector Crimper + Wire Cutter

Used for cutting copper and aluminum wires up to 8 gauge.

Your Price $29.99

NVX SDRLR1 Sound Dampening Rubber Roller

Install your Sound Dampening with ease! This heavy duty rubber roller is designed specifically to install your NVX products!

Your Price $7.99

Speaker Baffles for your Speakers

Enhance the sound of your speakers with these easy to install speaker baffles.

Your Price $9.99

Browse 1 question and 3 answers
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Why did you choose this?
Sonic Electronix Store
I picked this speaker because i am a sound engineer and quality trumps loudness always. I went to a few sound system places and all they were talking about was how loud one speaker is over another....I really had to take the cover off a few guys eyes and let them hear what I'm upgrading from. Cheap best buy speakers just wasn't gonna cut it for me lol.
Shane G on Dec 15, 2014
replaced rear deck speakers, much better then stock, have a second set I have yet to install in the doors, and am expecting the same performance as the rears, excellent!
Zach F on Sep 8, 2014
Husband bought these for my vehicle, we love them, buying a second set for his vehicle.
Sarah M on Dec 11, 2014

Product Summary


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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 GTO528

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