English

Problem

Causes and solutions

 

 

Sound only comes from some of

• Check that the settings of the amplifier’s Input Routing switches match the

the speakers connected to the

input and speaker connections made to the amplifier.

amplifier:

• Check that the vehicle audio system’s source unit’s balance and fader controls

 

 

are set to their center (midpoint) positions.

 

• If the subwoofer is silent and the optional Remote Bass Control is

 

connected to the amplifier, check that it is not turned all the way down (fully

 

counterclockwise).

 

 

Sound is too quiet, even with the

• Check the amplifier’s Input Level switches. If they are set to “Hi1,” turn the

vehicle audio system’s head unit

amplifier’s Gain controls all the way down and re-set the Input Level switches

volume turned all the way up:

to “Low.” Then perform the Set the Gain procedure, on page 9, again.

 

 

Sound in the front/rear speakers

• If the amplifier channels’ Input Level switch is set in the “Low” position, change

is distorted:

the setting to “Hi1” and perform the Set the Gain procedure, on page 9, again

 

for those channels.

 

• Make sure 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 vehicle audio system’s

 

source unit.

 

 

Sound in the subwoofer is

• If the amplifier Sub channel’s Input Level switch is set in the “Low” position,

distorted:

change the setting to “Hi1” and perform the Set the Gain procedure, on page

 

9, again for those channels.

 

• While listening to bass-heavy music, turn the Bass Boost control all the way

 

down, and then gradually increase it until the distortion begins to return.

 

Reduce the Bass Boost control setting slightly to eliminate the distortion and

 

leave it set there.

 

• Check that the distortion is not originating from the vehicle audio system’s

 

source unit.

 

 

GTO-5EZ only: The vehicle audio

• Make sure that the amplifier’s Front/Rear Input Routing switch is set in the

system’s source unit’s fader

“F&R” position.

control has no effect:

 

The vehicle audio system’s subwoofer volume control does not control the subwoofer’s volume:

•Make sure that the amplifier’s Sub Input Routing switch is set in the “S” position.

The amplifier’s Gain LEDs constantly illuminate red while the amplifier is operating:

• Set the amplifier’s Gain LEDs switch in the “Off” position.

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Harman GTO-5EZ, GTO-3EZ owner manual Problem Causes and solutions
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GTO-5EZ, GTO-3EZ specifications

The Harman GTO-3EZ and GTO-5EZ are compelling offerings from Harman's extensive range of car audio products. Both models showcase superior engineering and innovative technologies that make them standout choices for audiophiles and casual listeners alike.

Starting with the GTO-3EZ, this three-way speaker system emphasizes a balanced sound profile. It features a 3-inch polycarbonate woofer that ensures bass performance is both deep and smooth. The addition of a 1-inch textile dome tweeter enhances clarity in the high frequencies, providing a more immersive listening experience. Notably, the GTO-3EZ is designed with an integrated crossover network, enabling an accurate distribution of frequencies across the speaker components. This ensures that each driver operates efficiently within its designated frequency range, resulting in a cohesive sound stage.

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