Features
Patented Plus One® woofer cone
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.
Home theater-quality tweeter
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.
True sound from built-in crossover network
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.
Easy, patented Intermount III mounting system
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.
Can be safely driven by any head unit
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.
True 4 Ohm Technology
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.
Outstanding audio output
This muscular speaker offers 180 watts of peak power. Hit the gas and have fun.
Adjustable Tweeter Level
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.
Specs & Downloads
Item# GTO638
General Specifications
Audio Specifications
Dimensions
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
Documents & Downloads
The latest owner's manuals, quick start guides, and documents.
