JBL GTO939 Leaflet

A complete, innovative line of high-fidelity automotive 

speakers in popular factory replacement and 

aftermarket size configurations

®

 

JBL

®

 GTO Series high-fidelity automotive speakers feature innovative technologies 

engineered for the environment and conditions in today‘s cars to deliver exceptional sound. 
Using the patented Plus One

®

 (U.S. patent no. 7,548,631 B2) woofer cone technology 

and rugged construction materials like carbon composite frames, butyl rubber surrounds 
and fabric tweeter diaphragms, GTO Series automotive speakers are the ideal upgrade to 
any car‘s audio system. The most popular factory replacement and aftermarket sizes are 
covered, including component separates with woofer, tweeter and passive crossover. Easily 
installed and built to last, JBL GTO Series speakers bring music to life in the car, providing 
high-end performance at moderate prices.

Carbon injected Plus One cone

A larger diaphragm than other speakers in the same size 
class means more air moves with the stiff carbon cone

Better low-frequency response and  
musical character than other speakers the 
same size

Carbon composite, nonmagnetic frames

Transfers more energy to the moving parts of the speaker 
and resists warping on uneven surfaces during installation

Consistent performance and longer life 

Frequency response up to 21kHz

Helps to compensate for placement variations in the car 
and human hearing deficiencies in the high frequencies

Delivers more of the full-range response 
that you associate with great sound

Vented magnet assemblies

Increases cooling to the speaker’s voice coil

Reduces power compression and 
unwanted distortion

Three-ohm voice coils

Compensates for added resistance in thin-gauge factory 
speaker wiring for full power delivery. Compatible with all  
4 ohm-rated amplifiers and head units

Full power delivery means more rich sound 
delivered to the listener’s ears

High sensitivity (91-94dB @ 2.83V/1m)

Allows a wider range of power to have positive results

Excellent volume and musicality with as little 
as 5W RMS means better performance

Edge-driven soft dome tweeter (on 5-1/4"  
and larger coaxials and component sets)

Increased power handling and smoother high-frequency 
response 

More lifelike vocals, cymbals, brass 
instruments and piano sounds

UniPivot

™

 (U.S. patent no. 6,002,780) tweeter 

on 5-1/4" and larger coaxials)

Allows tweeter to be aimed toward listener’s ears in lower 
factory speaker positions to project the sound much 
higher up across the dash

Raises the sound stage and makes the 
music more realistic

0 or +3dB tweeter level adjustment (on  
5-1/4" and larger coaxials)

More control of the high-frequency blend to accommodate 
a greater variety of installation locations

Increased ability to personalize the sound 
for the listener’s taste

I-Mount

™

 (U.S. patent no. 5,859,917) tweeter 

mounting system on component speaker sets

Allows for surface or flush mounting of the 3/4" (19mm) 
component tweeter

Offers greater flexibility of installation to 
blend placement tastefully with interior 
surfaces

Dedicated 12dB/octave passive crossover 
network on component speaker sets

Filters low and high-frequencies to the appropriate 
speakers while increasing power handling 

Enhances sound quality and blend of the 
components as if a single speaker

Mounting hardware

Grilles, mounting adapter rings and/or tweeter cups all 
included in the specific models where necessary

More flexibility for installation options 

 

HARMAn International Industries, Incorporated www.jbl.com

 

8500 Balboa Boulevard, northridge, CA 91329 USA

© 2012 HARMAn International Industries, Incorporated. All rights reserved. JBL and Plus One are trademarks of HARMAn International Industries, Incorporated, registered in the  
United States and/or other countries. I-Mount and UniPivot are trademarks of HARMAn International Industries, Incorporated.
Features, specifications and appearance are subject to change without notice.