JBL GTO-3EZ Owner'S Manual Download Page 7

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input cOnnectiOns

The GTO-5EZ and GTO-3EZ amplifiers have multiple input connectors with routing switches that increase flexibility, so 

you can use these amps in a variety of audio system configurations.

EZ

Front and Rear 

Input Connectors

Front/Rear 

Routing 

Switch

Sub 

Routing 

Switch

Sub 

Routing 

Switch

GTO-3EZ

GTO-5EZ

Front Input  

Connectors

Sub Input  

Connector

Sub Input  

Connector

rOuting sWitches

The GTO amplifier routing switches let you determine which input connectors drive the amplifier’s various speaker 

outputs:

gtO-5eZ

Front/Rear Routing switch:

• F: The front and rear speaker outputs are both fed by the Front Input connectors.
• F&R: The front speaker outputs are fed by the Front Input connectors; the rear speaker outputs are fed by the 

Rear Input connectors.

Sub Routing switch:

• F&R: The Sub speaker output is fed by the Front and Rear Input connectors. (For use with source units that do not 

have a dedicated subwoofer connector.)

• S: The Sub speaker output is fed only by the Sub Input connector. (For use with source units that have a 

dedicated subwoofer connector.) 

gtO-3eZ

Sub Routing switch:

• F: The Sub speaker output is fed by the Front Input connectors. (For use with source units that do not have a 

dedicated subwoofer connector.)

• S: The Sub speaker output is fed only by the Sub Input connector. (For use with source units that have a 

dedicated subwoofer connector.)

cOnnecting the inputs

Use RCA audio cables to connect source units with preamp-level outputs to the amplifier; use the supplied bare wire-

to-RCA adapters to connect to source units that don’t have RCA output connectors.

Use a small Phillips screwdriver to loosen the adapter’s set screws and insert the speaker wires into the holes on the 

back of the adapter. Tighten the set screws to secure the wires. 

Loosen 

Screw

Insert 

Wire

Tighten 

Screw

Always connect the (+) speaker wire to the (+) terminal on the adapter and the (–) speaker wire to the (–) terminal on 

the speaker.

impOrtant: 

Make sure the (+) and (–) bare wires do not touch each other. Touching wires can cause a short circuit 

that can damage the source unit or the amplifier.

When you’re finished, plug the adapter into the appropriate input connector on the amplifier. 

• For bridged operation: Connect to either the left or right input connectors if you wish to feed the amplifier a mono 

signal (such as the center channel from a processor that outputs a center channel signal), or connect to both 

inputs if you want the amplifier to create a mono signal for a single speaker.

Summary of Contents for GTO-3EZ

Page 1: ...Owner s Manual GTO 5EZ GTO 3EZ power amplifier...

Page 2: ...ahead is OK but please don t skip Setup Procedure on page 8 So we can better serve you should you require warranty service please retain your original sales receipt and register your GTO 5EZ or GTO 3E...

Page 3: ...nting surface with four appropriate mounting screws of your own choice We suggest using 8 Phillips head sheet metal screws Make sure the amplifier is mounted securely Connections IMPORTANT Disconnect...

Page 4: ...to loosen the connector s set screw insert the bare wire and tighten the set screw to secure the wire in the connector Loosen Screw Insert Wire Tighten Screw Ground Connection Connect a wire minimum 6...

Page 5: ...ed near the battery GTO 5EZ 90A fuse GTO 3EZ 70A fuse Speaker Connections Always connect the terminal on the amplifier to the terminal on the speaker and the terminal on the amplifier to the terminal...

Page 6: ...els in stereo and the other pair of left and right channels bridged for a 3 1 channel system See Connecting the Inputs on page 7 for information about connecting the inputs for bridged operation GTO 3...

Page 7: ...ed by the Front Input connectors For use with source units that do not have a dedicated subwoofer connector S The Sub speaker output is fed only by the Sub Input connector For use with source units th...

Page 8: ...ier channels Set the Crossover Filter selector in the LP low pass position This will limit the amount of high frequency energy sent to the woofers or subwoofer If you have connected any other type of...

Page 9: ...ut Level switch to the Hi2 position The Hi2 position includes a circuit designed to fool this type of factory system into seeing a speaker connected to its output 2 Turn all amplifier Gain controls to...

Page 10: ...nnection for turn on check that the wire is properly connected to the audio system s remote turn on wire or to the vehicle s ACC power terminal If you are using the amplifier s Auto Turn On circuit fo...

Page 11: ...re amplifier s Crossover Filter selector for the distorted channels is set to HP Set the distorted channels Crossover control to a higher setting Check that the distortion is not originating from the...

Page 12: ...Replacement 30A x 3 Dimensions D x H x W 14 11 16 x 2 9 16 x 9 11 16 373mm x 66mm x 246mm Weight 11 2 lb 5 1kg GTO 3EZ Number of Channels 2 1 Power Output CEA 2006A 50W RMS x 2 channels at 4 ohms 350W...

Page 13: ...ights reserved JBL is a trademark of HARMAN International Industries Incorporated registered in the United States and or other countries Features specifications and appearance are subject to change wi...

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