Audio Input Connections, Line Level Input Connection

wire for all grounding, even signal processors and head units, can also help to minimize possible noise pickup.

Remote Turn-On Wire (Blue with White Stripe)

Because the JBL GTS100 includes Common Sense 2-way turn-on circuitry, you have two options for remotely activating the amplifier. When using the speaker level inputs with a head unit that includes a BTL power amp it is not necessary to connect the remote wire. The amplifier will automati- cally activate whenever you turn on the head unit. If the head unit is not of the high power BTL type, Common Sense will not work. You will need to connect a remote wire as discussed below. If you are using the line level inputs follow the remote wire connections listed below.

The remote power control system turns the GTS100 off when not in use to pre- vent discharging of the vehicle’s bat- tery. When +12 volts is applied to the remote wire the amplifier is turned on. A red LED on the end panel of the ampli- fier lights whenever the amplifier is on. If the head unit has a +12 volt automatic antenna or amplifier remote activation wire, connect it to the blue/white wire of the GTS100.

Some head units have no automatic antenna or power amp activation wire. Other decks have automatic antenna wires that are “on” only when the radio is used (the +12 volt signal is off when a tape is played.) In such cases, connect the remote turn-on wire to an unused accessory terminal in the fuse block, or any other +12 volt source that is turned

on and off with the vehicle’s ignition switch. The remote on/off system draws negligible current so a relatively small (18 or 20 gauge) extension wire may be used. Be sure to securely crimp or sol- der and insulate the wire-to-wire con- nections.

Audio Input Connections

Line Level Input Connection

Proper wiring between the signal source, any other components in the system and the GTS100 will help to keep noise levels in the system low. Use high quality, low capacitance shielded wire. Keep the wire as short as possible. Do not splice shielded wires together. Do not run audio signal wires alongside power wires either for the amp or the vehicle’s standard power wires. When wires are run for long distances, separate the audio sig- nal wires from power supply wires or vehicle wiring harnesses as much as possible. When signal wires and power wires must cross, try to keep them per- pendicular. Avoid routing any wires near accessories such as ignition con- trol modules, tachometers, fuel pumps or fan motors.

The line level inputs of the GTS100 accept standard phono plugs (also called RCA plugs.) The outputs of most head units, equalizers or crossovers also accept RCA connectors. If another type of connector is used, adapters or special cables may be needed. Proper wire and connectors can be obtained from any JBL authorized installation specialist.