Thank you for choosing the JBL
GT-BassPro12 powered automotive
subwoofer. The GT-BassPro12 has been designed to deliver great
bass performance from a compact, easily installed powered subwoofer
To get the best performance from your GT-BassPro12, we strongly
recommend that installation be entrusted to a qualified professional.
Although these instructions explain how to install the GT-BassPro12 in a
general sense, they do not show specific installation methods that may be
required for your particular vehicle. If you do not have the necessary tools
or experience, do not attempt the installation yourself. Instead, please
ask your authorized JBL car audio dealer about professional installation.
In order that we may better serve you should you require warranty
service, please retain your original sales receipt and register your
GT-BassPro12 online at www.jbl.com.
InsTallInG The suBwOOfer
InstallatIon WarnIngs and tIps
• Always wear protective eyewear when using tools.
• Disconnect the vehicle’s negative (–) battery terminal before starting
• Check clearances on both sides of a planned mounting surface. Be
sure that screws or wires will not puncture brake lines, fuel lines or
wiring harnesses, and that wire routing will not interfere with the safe
operation of the vehicle.
• When making electrical connections, make sure they are secure and
• I f you must replace the GT-BassPro12’s fuse, be sure to use the same
type of fuse and current rating as that of the original.
MountIng the subWoofer
Choose a location for the subwoofer that doesn’t interfere with cargo,
a fold-down rear seat or the trunk lid. The best location is usually a
corner of the trunk or cargo area, as shown in the illustrations. Choose a
mounting location in the front of the vehicle for the remote level control.