Support Overview / Car & Marine / Car Speakers / Multi-Element / GTO638
GTO638

GTO638

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

Sold from 2009 until now

Predecessor Product: GRAND TOURING GTO 637
Made in: China

Getting started with your GTO638

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Product Specifications

Type
Two-Way
Series
Grand Touring
Size
6-1/2
Nominal Impedance
2 ohms
Sensitivity
(2.83V@1m) 92dB
Power Handling (RMS)
60W
Frequency Response
50Hz – 21kHz
Power Handling (Peak)
180W
Mounting Depth (in)
2-1/16
Mounting Cutout Diameter (in)
5-1/4
External Diameter (in)
6-1/4
Mounting Depth (mm)
52
External Diameter (mm)
159
Mounting Cutout Diameter (mm)
133

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.

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.

Images & Videos

GRAND TOURING GTO 638 - Black - 6 1/2 inch 3-Way - Hero
  • GRAND TOURING GTO 638 - Black - 6 1/2 inch 3-Way - Hero
  • GRAND TOURING GTO 638 - Black - 6 1/2 inch 3-Way - Hero
  • GRAND TOURING GTO 638 - Black - 6 1/2 inch 3-Way - Front
  • GRAND TOURING GTO 638 - Black - 6 1/2 inch 3-Way - Detailshot 1

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