Owner's Manual
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, specifi cations
and appearance are subject to change without notice.
Technical specifi cations:
GX328
3-1/2" coaxial car audio loudspeaker
Power Handling: 25Wrms, 75W Peak
Frequency Response: 90Hz – 21kHz
Impedance: 2.3 ohms
Sensitivity (@ 2.83V/m): 89dB
GX428
4" coaxial car audio loudspeaker
Power Handling: 35Wrms, 105W Peak
Frequency Response: 75Hz – 21kHz
Impedance: 2.3 ohms
Sensitivity (@ 2.83V/m): 90dB
GX528
5-1/4" coaxial car audio loudspeaker
Power Handling: 45Wrms, 135W peak
Frequency Response: 65Hz – 21kHz
Impedance: 2.3 ohms
Sensitivity (@ 2.83V/m): 91dB
GX628
6-1/2"
coaxial car audio loudspeaker
Power Handling: 60Wrms, 180W Peak
Frequency Response: 50Hz – 21kHz
Impedance: 2.3 ohms
Sensitivity (@ 2.83V/m): 92dB
GX6428
4" x 6" coaxial car audio loudspeaker
Power Handling: 40Wrms, 120W Peak
Frequency Response: 75Hz – 21kHz
Impedance: 2.3 ohms
Sensitivity (@ 2.83V/m): 91dB
GX8628
5" x 7" / 6" x 8" coaxial car audio
loudspeaker
Power Handling: 60Wrms, 180W peak
Frequency Response: 50Hz – 21kHz
Impedance: 2.3 ohms
Sensitivity (@ 2.83V/m): 92dB
GX9628
6" x 9" coaxial car audio loudspeaker
Power Handling: 100Wrms, 300W Peak
Frequency Response: 45Hz – 21kHz
Impedance: 2.3 ohms
Sensitivity (@ 2.83V/m): 94dB
GX9638
6" x 9" three-way car audio loudspeaker
Power Handling: 100Wrms, 210W Peak
Frequency Response: 45Hz – 21kHz
Impedance: 2.3 ohms
Sensitivity (@ 2.83V/m): 94dB
GX608C
6-1/2" car audio component speaker system
Power Handling: 70Wrms, 210W Peak
Frequency Response: 50Hz – 21kHz
Impedance: 2.3 ohms
Sensitivity (@ 2.83V/m): 92dB
High performance multi-element speakers and component systems engineered to deliver
world-class JBL performance and superior fi t into most factory speaker locations.
GX Speakers
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