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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.

Front and Rear

Input Connectors

GTO-5EZ

Front/Rear Sub

Routing Routing

Switch Switch

Sub Input

Front Input

Connector

Connectors

EZ

GTO-3EZ Sub

Routing

Switch

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

Insert

Tighten

Screw

Wire

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.

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Harman GTO-5EZ, GTO-3EZ owner manual Input Connections, Routing Switches, Connecting the Inputs
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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.

The GTO-5EZ takes the performance a step further with its five-way speaker configuration. Featuring a larger 5.25-inch woofer, the GTO-5EZ excels in delivering richer bass and enhancing volume levels without distortion. Accompanied by a 1-inch soft dome tweeter, this speaker captures the intricacies of vocals and instruments, giving listeners a truly engaging experience. This model also incorporates an advanced silk dome midrange driver, providing superior mid-frequency clarity that complements both vocal and instrumental tracks.

Both models utilize Harman’s proprietary EQ settings which allow users to tailor their listening experience. This feature offers a selection of preset equalizer options, helping users achieve optimal sound depending on their personal preferences or specific musical genres. In addition, the speakers employ a robust build quality with durable materials that ensure longevity and resilience against harsh automotive environments.

The GTO-3EZ and GTO-5EZ are also designed for easy installation, featuring adaptable mounting hardware that caters to a variety of vehicle models. With a sleek aesthetic, they blend seamlessly into car interiors, enhancing the overall look without compromising on performance.

Overall, the Harman GTO-3EZ and GTO-5EZ are exemplary choices for those seeking top-notch car audio solutions. With their state-of-the-art technologies, thoughtful design, and exceptional sound quality, these speakers promise to elevate any driving experience, making each journey a melodious adventure.
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