JBL GTO-3EZ and GTO-5EZ Stereo Amplifier Owners Manual

Why You Should Pay Attention to This Owner’s Manual

The performance of your vehicle’s audio system depends as much on quality installation and setup as it does on quality gear. Of course, these new JBL® GTO amplifiers are bulletproof performers that are built using the highest quality components, and will outperform any competing product on the test bench. To make sure you extract all the performance possible from your new amp, whether you install it yourself or have a professional install it for you, we’ve incorporated some new features that make setup simple and precise and ensure you get all the power and performance you’ve paid for.

What makes these amplifiers different

All amplifiers include some signal processing functions, level setting controls and other switches and connectors that make it possible to hook the amp up to just about any existing system. However, with many amplifiers, considerable technical expertise is required to make the best use of those connectors, switches and controls to get powerful noise- free sound. JBL GTO amplifiers include Simple Setup designed to make it easy for you to get all the noise-free power your amp is capable of delivering.

What makes input setup easy

GTO Amplifiers include adapters for connecting almost any analog signal and feature built-in Gain Indicator LEDs and a setup CD that makes precision adjustment simple, no matter your level of experience. The setup of GTO amplifiers is a little different than amplifiers you may have installed in the past, so please read this owner’s manual before you begin. If you’re an experienced installer, skipping 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-3EZ online at www.jbl.com.

Included Items

The following items are included in the packaging. If any of these items are missing, please contact your authorized

JBL dealer, or JBL customer service at www.jbl.com.

GTO Series
Amplifier	Setup CD

Bare Wire-to-RCA Adapters

(5 in GTO-5EZ; 3 in GTO-3EZ)

Location and Mounting

Installation Warnings and Tips

IMPORTANT: Disconnect the vehicle’s negative (–) battery terminal before beginning the installation.

•Always wear protective eyewear when using tools.

•Check clearances on both sides of a planned mounting surface. Be sure that screws or wires will not puncture brake lines, fuel lines or wiring harnesses, and that wire routing will not interfere with the safe operation of the vehicle.

•When making electrical connections, make sure they are secure and properly insulated.

•If you must replace any of the GTO-5EZ/GTO-3EZ’s fuses, be sure to use the same type of fuse and current rating as that of the original.

Installation Location

Amplifiers need air circulation to stay cool. Select a location that provides enough air for the amp to cool itself.

•Suitable locations are under a seat (provided the amplifier doesn’t interfere with the seat adjustment mechanism), in the trunk, or in any other location that provides enough cooling air.

•Do not mount the amplifier with the heatsink facing downward, as this interferes with the amplifier’s convection cooling.

•Mount the amplifier so that it will not be damaged by the feet of backseat passengers or shifting cargo in the trunk.

•Mount the amplifier so that it remains dry – never mount an amplifier outside the car or in the engine compartment.

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.