JBL A6000GTi, A3000GTi owner manual Making the Connections

MAKING THE CONNECTIONS

POWER CONNECTIONS

Use 0-gauge cable to connect the amplifier’s GND – terminal directly to the vehicle’s chassis (see Figure 5). Scrape off all paint from the metal area for a good, clean ground connection. Make sure the ground wire is as short as possible and is connected to metal on the vehicle’s body. Do not connect the GND – cable to the frame of the vehicle. It is isolated from the chassis using rubber shims and will not provide an adequate ground. Instead, use the trunk’s floor or cargo area as a suitable location. Do not connect the GND – cable to the battery’s negative (–) terminal.

Source Unit

Connect the source unit’s remote turn-on lead to the REMOTE terminal on the amplifier (see Figure 5). Use any convenient gauge wire for the connection.

The amplifier’s internal neon lights require a separate switched power connection with at least a 2-ampere current capacity. If desired, install a switch to turn on the neon lights or a relay triggered by a circuit in the vehicle (e.g., door switch, trunk pin switch or other turn-on source). If you want the amplifier’s neon to light when the amplifier is on, connect the LIGHTING terminal to a relay triggered by the radio’s remote turn-on lead (see Figure 5).

SIGNAL CONNECTIONS

Use high-quality twisted-pair RCA audio cables to connect your source unit’s main stereo or subwoofer RCA output jacks to the amplifier’s L/R INPUT jacks. For a single subwoofer output, use an RCA “Y” adapter to connect its signal to both input jacks.

As a convenience, each JBL A6000GTi or A3000GTi amplifier is also equipped with a set of PASS-THRU L/R RCA audio jacks. They will pass incoming audio signals unaltered, and you can use them to send stereo audio signals to other components in your system.

REMOTE LEVEL

For gauges, varying voltages are output on selected RJ45 pins to indicate voltage, current and temperature.

For battery voltage, linear scale (pin 1): 2 volts = 8 volts at the battery

4.5volts = 18 volts at the battery For temperature, linear scale (pin 2):

0 volts = –10 degrees Celsius

5 volts = 110 degrees Celsius For current, linear scale (pin 3):

0 volts = 0 amperes current draw

5 volts = 800 amperes current draw

Also, you can connect a power meter using the pins for battery voltage and current. Be sure to use a power meter that multiplies the incoming voltage

A6000GTi

Power Terminals

CONTROL/ACCESSORY GAUGE OUTPUTS

and current signals (i.e., P = E x I) to convert the data to watts.

Remote Turn-On

(or other	+12 V
turn-on	85	87	87a
signal)
		no	nc
	86	30
Ground	SPDT Relay			ANN-Type Fuse
				(500 A or more)
				18"

Figure 5. Power wiring

diagram for the JBL A6000GTi

0-gauge 0-gauge

Chassis

Ground

(Bare Metal)

The A6000GTi and A3000GTi use an RJ45 connector to output control signals for the Remote Level Control and accessory gauges. Use the 15' RJ11 cable to connect the control to the amplifier. For accessory gauges, use the pinouts in Figure 6 to make custom cables with materials found at most electronics supply stores or home centers.

RJ45 Connector
(GTi Input Panel)	8	1

CONNECTING

THE SPEAKERS

IMPORTANT: As a safety feature and due to the high output voltage capability of the A6000GTi and A3000GTi amplifiers, the SPEAKER OUTPUTS are equipped with a cover that must be in place in order for the amplifier to operate. When the cover is removed, the amplifier will turn off and speaker connections can be made safely.

amplifier. The A3000GTi is	Batteries
wired in a similar way.

Ground (also use for acc. gauges) = 8	1				= Battery Voltage (to acc. volt meter)
No Connection = 7				2	= Temperature (to acc. temp. gauge)
Remote Level Control = 6		3			= Current (to acc. ampere meter)
Remote Level Control = 5			4		= Remote Level Control

Use 0-gauge cable to connect the BATT+ terminal directly to the vehicle’s battery. If the battery is located in the engine compartment and the BATT+ cable must be routed through the firewall or any metal obstruction, install a wafer-type (ANN) fuse with a current rating of at least 500 amperes and an appropriate fuse holder within 18" of the vehicle’s battery (see Figure 5).

IMPORTANT: Do not connect a jumper directly between the REMOTE and LIGHTING terminals. Doing so may burn out the remote turn-on circuits in your source unit.

Figure 6. Pinouts for the REMOTE LEVEL RJ45 connector on the A6000GTi or A3000GTi amplifier.

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