[. . . ] Although these instructions explain, in a general sense, how to install Loud + Clear amplifiers, they may not show the exact installation methods for your particular vehicle. If you feel you lack the tools or necessary experience, ask your authorized JBL car-audio dealer about professional installation options.
Installation Warnings and Tips · Always wear protective eyewear when using tools. [. . . ] Make sure the amplifier is mounted securely.
If you are bridging the amplifier, connect the speaker wires to the terminals marked "bridged, " observing proper polarity. The total impedance of the speaker system connected to the amplifier must be at least four ohms in bridged mode. If you are running the amp in Tri-Mode (stereo and mono simultaneously), connect the satellite speakers to the speaker connector as you would a pair of stereo speakers. Connect the subwoofer to the terminals marked "bridged. " Refer to the chart below to determine the capacitor and inductor values you'll need to route bass signals to the woofer, and the midrange and high frequencies to the satellite speakers. These passive crossover components will also ensure that the impedance of the speaker system doesn't drop below two ohms.
FREQUENCY
Crossover 75Hz 100Hz 125Hz 150Hz 175Hz 200Hz
INDUCTOR
6dB/oct. HP (4 ohm) 530µF 400µF 318µF 265µF 227µF 198µF
Wiring the Power Connections
Refer to Figures 14 for connector locations. For power, remote and ground connections strip off one end of each jacket to reveal bare wire for insertion into the barrier-strip connectors. Connect a wire from the GND connector on the amplifier to the nearest bare-metal chassis component; scrape away the paint to ensure good conductivity. Next, connect a wire between the BATT terminal on the amplifier and the POS (+) terminal of the vehicle's battery. Pass the wire through a factory-installed grommet in the firewall, or install a grommet if a factory grommet is not available. You must install, within 18" of the battery connection, a fuse holder and fuse with the same rating as the fuse in the amplifier's chassis. This will prevent a short circuit from causing damage to the amplifier or the car. [. . . ] Amplifier protection is engaged due to overheating; shorted or defective speaker or speaker cable.
Solution
Check connections, source, speakers.
No audio (power indicator is off).
Check voltage at amplifier terminals with VOM. Disconnect speaker leads one at a time to determine which speaker or wire is shorted or defective. [. . . ]