GTO-804EZ - JBL Car Audio Service Manual (repair manual). Page 4

1.  Connect a wire (minimum 8AWG – 8.4mm

2

 – for the GTO-804EZ; minimum 10AWG – 5.3mm

2

 – for the 

GTO-504EZ) directly to the battery’s positive (+) terminal. 

2.  Install a fuse holder for a 50A fuse (GTO-804EZ) or 40A fuse (GTO-504EZ) on this wire within 18" (46cm) of the 

battery’s (+) terminal. Do not install the fuse in the holder at this time.

3.  Route this wire to the amplifier’s location and connect it to the amplifier’s +12V terminal. Be sure to use 

appropriate grommets whenever routing wires through the firewall or other sheet metal. IMPORTANT: Failure to 
adequately protect the positive wire from potential damage may result in a vehicle fire.

4.  When you are finished routing and connecting this wire, install the appropriate fuse in the holder you installed near 

the battery. (GTO-804EZ – 50A fuse; GTO-504EZ – 40A fuse.)

Always connect the (+) terminal on the amplifier to the (+) terminal on the speaker and the (–) terminal on the amplifier 
to the (–) terminal on the speaker.

IMPORTANT: Make sure the (+) and (–) bare wires do not touch each other or the other terminal at both the amplifier 
terminals and speaker terminals. Touching wires can cause a short circuit that can damage the amplifier.

NOTE: The minimum speaker impedance for stereo operation is 2 ohms. The minimum speaker impedance for bridged 
operation is 4 ohms.

• Connect the front speakers to the FL and FR (+) and (–) terminals. 

• Connect the rear speakers to the RL and RR (+) and (–) terminals. 

4