Item# GTO638



180-watt, three-way, 6-1/2" speakers

$66.9566.95 per pair $129.95
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Does It Fit My Car?

Pop the JBL® GTO638 into any factory location with no special tools or modifications. You’ll suddenly have the big, booming bass and the rich, crisp, detailed sound that make JBL® products famous – in your car. (Yes, your car.) You’ll hear the power of JBL-patented Plus One® woofer cones and a My-Ti™ tweeter. A very large voice coil, like the ones the best home audio speakers have, delivers crystal-clear, extended high frequencies for audiophile-quality performance. And a UniPivot™ (patent number 6,002, 780) tweeter pod gives you control of imaging even if the speaker has to be mounted low. In the GTO638, you’ll find attention to detail that’s rarely given to car audio. And it’s a game-changer.

What's in the box?

  • (2) GTO638 speakers
  • (2) Mounting brackets
  • (2) Grilles
  • (2) Buffer for mounting bracket/grille
  • (4) Sets of speaker wire
  • (16) Screws
  • (1) Owner's Manual

Our proprietary Plus One® woofer cone (patent number 7,548,631) is exceptionally stiff and lightweight and has up to 25 percent more active surface area than you’ll ever find on competing models of the same size. It delivers an audible increase in bass output and efficiency.

The GTO683 has a high-bandwidth, edge-driven textile-dome tweeter with a large voice coil, just as high-end home audio loudspeakers do. The tweeter’s My-Ti™ (a proprietary Mylar®-titanium blend) alloy delivers great power handling, extended high frequencies and seamless integration with the woofer.

By using a built-in crossover network with advanced high-pass and low-pass filters, the GTO638 creates a smooth transition between the woofer and tweeter. The result? Midrange vocals that sound so natural and lifelike, you’d think the vocalist was sitting in the passenger seat.

The Intermount III (patent number 6,505,705) system makes installation easy. Using its JBL® installation rings (included), you can fit the GTO638 into factory-built installation locations varying from 6 to 6-3/4 inches. It even simplifies the replacing of aftermarket speakers.

The GTO638 is compatible with aftermarket head units and factory-installed systems. Designed to replace factory-installed OEM (original-equipment manufacturer) speakers, the GTO638 is easily installed into nearly any factory-built 6-1/2-inch location – and doing it won’t require special tools or modifications.

For the most powerful performance, the GTO638 makes the best use of any amplifier by providing an optimum 2-ohm load. It uses a lower-impedance voice coil than a typical speaker to extract the most power and performance possible from all amplifiers engineered to drive loads of 4 ohms or less.

This muscular speaker offers 180 watts of peak power. Hit the gas and have fun.

The GTO 638 allows the tweeter level to be adjusted 0 to +3 decibels to compensate for low and off-axis mounting positions or road noise.

Grand Touring
Nominal Impedance
2 ohms
(2.83V@1m) 92dB
Power Handling (RMS)
Frequency Response
50Hz – 21kHz
Power Handling (Peak)

1 Year Warranty

Products purchased online or from an authorized local retailer and under warranty may qualify for an exchange with a valid receipt.

Purchases made from an unauthorized dealer will not be eligible for exchange.

Request an Exchange

Call us: 1.800.336.4525

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  • Technical help
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GTO638 is rated 4.75 out of 5 by 4.
Rated 5 out of 5 by from Amazing for the low price! I purchased a pair of 638s and 938s for my 2009 Toyota Venza and they sounded amazing with the stock non-JBL sound system, which is the lowliest on the Venza. They sounded loud enough for not being amplified. But I wanted to test them good, so I added an old-school Rockford 500a2. WOW! They got obscenely loud. How can these cheap speakers sound this good? They're made by JBL. Based on my good experience with these GTO speakers, I purchased a pair of amplified JBL LSR308 studio monitors for my music production. They don't sound loud like these GTO models but have some of their warmth and clarity. JBL are masters at their craft! You pay the price for entry-level speakers but the sound and quality is outstanding. These GTO speakers not only sound excellent, but can get LOUD without distortion. Seriously, they get impressively loud without losing clarity. I'm buying another set for my sister's car AND also for my car, since I don't have the Venza anymore. JBL has return customers for a reason. They make good products even on their entry-level lines. I'm tempted to upgrade to the Power series but these GTO series are flawless. I can't imagine a reason to get anything louder than these! BELIEVE ME!
Date published: 2015-10-09
Rated 5 out of 5 by from Super clear, good bass, overall amazing I put these and the GTO928 three way 6x9 in my 1992 Chevy Cavalier let me tell you these aren't your 90s stock speakers. I could not believe how great these sounded even compared to just everyones cars that are newer. I have the best sounding and loudest bass speakers out of everyone i know thanks JBL!
Date published: 2015-09-22
Rated 5 out of 5 by from crystal clear i wanted to upgrade my sound in my 2011 corolla s. so i read all types of reviews and watched youtube videos and everybody said nothing by great things about these speakers. and they were so right. the 638's in my front doors sound amazing. when they say concert sound they mean it. crystal clear highs and mids. i also put the 938's in the rear and they bang with no distortion. forgot to add, that im using the factory head unit and no amps. jbl is the best hands down
Date published: 2014-06-07
Rated 4 out of 5 by from Good overall sound and easy to install. Nice mounting kit included.
Date published: 2015-12-19
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i read that the GTO638 require a battery of some sort is that correct?

Asked by: guys
No need to have this hooked up to a battery as the GTO638 is a passive speaker. It must be connected to an amplifier in order to function.
Answered by: Joe G at Customer Service
Date published: 2016-09-19

I have a 2009 highlander. Will these speakers fit in the front doors?

Asked by: Shane
As shown on this website, when you select the "Find what fits your car" section and select your vehicle's make and model, you can see that the GTO638 is one of the speakers that fits your car.
Answered by: Joe G at Customer Service
Date published: 2016-09-05

This speakers will fit front and rear Scion Xb 2008? 

Asked by: Virringo
As shown on this website, when you select the "Find what fits your car" section and select your vehicle's make and model, you can see that the GTO638 is one of the speakers that fits your car.
Answered by: Joe G at Customer Service
Date published: 2016-08-08

Will this speakers work fine with an amo consisting of 2 - 50watt channels at 4ohms? Or will my amp be damaged?

Asked by: Lefo
The speaker will work with an amp with a power output rating of 60W or lower running at 4ohms as the speaker has a power input rating of 60W RMS @4ohms. With that said you wouldn't damage either the amp or the speaker.
Answered by: Amir at Customer Service
Date published: 2016-07-04

Is this speaker recommended to fit only the Prius 2013 back doors? If so what fits the front door?

Asked by: Cpe173
Thank you for your question any 6 1/2 speakers will fit the front panel doors of your vehicle
Answered by: Randy at JBL
Date published: 2016-06-30

Hi I have 2013 Honda Accord sport  .. I want to replace my honda speaker to JBL .. Do I need amp ??? I'm Looking for 3 way speaker .. Need loudness and little bass ?? What kind for JBL speaker can work for my car ?? 

Asked by: Tejinder Pabla
Thank you for your question, are you going to replace your head unit if not you can use any 6 1/2 speaker and no need for an amplifier, If you want more loudness you can get GTR 7535 amplifier five channel amp 4 speakers GTO638 and a subwoofer for maximum speaker setup
Answered by: Randy at JBL
Date published: 2016-04-27

I'm replacing my truck speakers which are 4 ohm. Can I use  GTO 638 as they are 2 ohm ? Does it make any difference ?

Asked by: Aman
Thank you for your question, No it does not make any difference you can replace the stock speakers and this can accommodate higher power rating amplifiers
Answered by: Randy at JBL
Date published: 2016-04-12
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