Product Datasheet/Brochure

HARMAN International Industries, Incorporated
8500 Balboa Boulevard, Northridge, CA 91329 USA
www.jbl.com
© 2018 HARMAN International Industries, Incorporated. All rights reserved. JBL is a trademark of HARMAN
International Industries, Incorporated, registered in the United States and/or other countries. Features, specifications
and appearance are subject to change without notice.
What’s in the Box
GX328
2x Speakers
1x Gasket Foam
GX428
2x Speakers
1x Gasket Foam
GX528
2x Speakers
1x Gasket Foam
8x Screws
8x Speed clips
2x Grilles
GX628
2x Speakers
1x Gasket Foam
8x Long mounting screws
8x Speed clips
2x Grilles
2x Plastic multi-hole adapter rings
8x Short mounting screws
GX608C
2x Speakers
1x Gasket Foam
2x Long mounting screws
1x Foam gasket
2x Crossover
6x Short mounting screws
2x Speed clips
2x Tweeters
2x Flush-mount cups
2x Threaded flush-mount adapters
2x Plastic locking nuts
2x Surface-mount cups
2x Starfish tweeter mounts
2x Washers
2x Cover nuts
GX6428
2x Speakers
1x Gasket Foam
GX8628
2x Speakers
1x Gasket Foam
GX9638
2x Speakers
1x Gasket Foam
GX9628
2x Speakers
1x Gasket Foam
Features and Benefits
Plus One
™
Woofer Cones
HARMAN’s patented (US patent #7,548,631) Plus One
™
polypropylene cones provide more overall speaker-cone area than other cones in its class. The
result is higher sensitivity, increased low-frequency output and greater overall performance.
Edge-Driven Soft Dome Tweeter
Edge-driven dome tweeters provide better power handling than balanced-dome tweeters by providing more heat-dissipating surface area in the voice coil.
We use larger tweeter diaphragms because we always know where the listeners will sit in a car. It’s not like in a house, where many listening positions must
be accommodated.
Three-ohm DCR Voice Coils
Low-Impedance, three ohm voice coils compensate for the undergauged speaker wiring found in many of today’s cars, and make the most of every watt
your amplifier or head unit can deliver.
Frequency Response up to 21kHz
Hear what you’ve been missing – the JBL GX Series offers a frequency response that delivers the full-range response associated with exceptional sound.
Individually Voiced
For most brands, off-the-shelf speakers and a cursory approval of frequency response curves are good enough. That’s not the case with JBL. We don’t
only listen to our speakers against the competition – we voice them against each other to ensure each line has the consistent JBL sound signature that’s
known and sought out by those who care about their audio. This is just part of an extensive development process undertaken by some of the best transducer
engineers in the world to provide the finest listening experience at any price point.
HARMAN-Proprietary Tweeter Deflector
Acting as a waveguide, the tweeter deflector allows for an angled, rotating speaker, which optimizes the off-axis sound performance. Because all cars are
designed differently, this allows impeccable sound to travel throughout all locations in the cabin.
Affordable Pricing
The JBL GX Serie speakers are all designed to give audio enthusiasts more boom for the buck – while they maintain a conservative price point, there is
never a compromise in sound.
OEM-Level Reliability Testing
JBL tests every speaker design to the same rigid specifications as the automakers, subjecting them to extreme conditions that would break lesser speakers.
We freeze them, bake them, shake them, blast them with ultraviolet light and drive them at full power for days to make sure your audio investment
lasts for years.
High performance multi-element speakers and component systems engineered to deliver
world-class JBL performance and superior fit into most factory speaker locations.
GX Speakers