Welcome to Club GTi

Thank you for purchasing the finest Automotive Component Systems JBL has ever produced. As a GTi Competition Series owner, you are a member of a select group of people who enjoy the most advanced mobile audio products available. We call this group “Club GTi.” By sending in the customer information card, which you will find attached to your warranty, we will automatically register you as a Club GTi member which will give you access to exclusive Club GTi apparel and other special offers we will make available from time to time. We suggest you fill the card out at your earliest convenience.

Also, be sure to save your sales receipt in a safe place. It will be necessary to use this document as proof of purchase in the event that you ever need warranty service. It is also useful for insurance purposes and for establishing value when you re-sell your vehicle.

About This Manual

Because of the performance capability of your GTi Competition Series product, and the variety of potential system configurations, we strongly recommend that you have the system professionally installed. You will also get a better warranty if your equipment is professionally installed by an authorized GTi dealer and you have your warranty card stamped. This manual provides information on installation and usage to help a skilled technician get the most from your GTi Competition Series product. This manual does not cover basic information about installation which is common knowledge to a professional installer, except for information which is unique to the 408 and 508GTi systems.

If you feel you possess the necessary skills, and prefer to install the equipment yourself, this manual will provide you with the necessary specifics to properly use the 408 or 508GTi in typical installations. Consult your JBL dealer, or a qualified technician, for more information.

Autosound at its Best

The 408 and 508GTi systems are built to meet the same rigorous standards of construction and performance that have long established JBL’s renowned home and professional speaker systems. The 408 and 508GTi Woofer/Midranges incorporate advanced JBL woven Kevlar cones which are especially suited to the unique acoustic and environmental conditions which characterize automotive sound. The 408 and 508GTi Tweeter incorporates advanced JBL pure titanium technology which is especially suited to the unique acoustic environment of modern vehicles. The 408 and 508GTi have been engineered to provide excellent power handling, good dispersion and balanced frequency response, along with minimum size and flexible installation options for optimizing placement within the vehicle.

The small size of the GTi Drivers is made possible through the use of a Neodymium magnet assembly with JBL’s Stray Field Containment Geometry. By

3

Page 2 Page 4
Page 3
Image 3
JBL 508GTI manual Welcome to Club GTi, About This Manual, Autosound at its Best
Page 2 Page 4

508GTI specifications

The JBL 508GTI is a remarkable addition to the world of professional audio monitors, designed to satisfy discerning listeners as well as studio professionals. With its striking design and cutting-edge technology, the 508GTI offers an impressive listening experience tailored for various audio applications, from music production to film scoring.

At the heart of the 508GTI lies a 5-inch low-frequency woofer made of a proprietary polypropylene composite, ensuring excellent bass response and clarity. This cone design minimizes distortion, allowing for clean reproduction of bass frequencies down to 45 Hz. Complementing the woofer is a 1-inch titanium dome tweeter that delivers smooth and precise high frequencies up to 40 kHz. This wide frequency response ensures that the 508GTI reproduces audio accurately, making it easier for sound engineers to mix music that translates well across different playback systems.

One of the standout features of the JBL 508GTI is its innovative Image Control Waveguide technology. This sophisticated design optimizes the speaker's dispersion pattern, allowing for a larger sweet spot while maintaining excellent stereo imaging. As a result, listeners can enjoy an immersive sound experience even when they are not seated directly in front of the monitors.

The 508GTI also incorporates advanced bi-amplification, utilizing separate amplifiers for the woofer and tweeter. With a total power output of 82 watts, this design ensures that each driver operates at its peak performance without compromise. Additionally, the built-in DSP processing allows users to tailor the speaker’s performance to their specific acoustic environment, making it highly versatile for any studio setting.

Connectivity options on the JBL 508GTI include XLR and TRS balanced inputs, providing flexibility for various professional audio sources. The speaker is also equipped with rear controls for adjusting high and low-frequency response, enabling users to optimize their listening experience based on the room's acoustics.

In summary, the JBL 508GTI combines premium materials, innovative technologies, and versatile features, making it an exceptional choice for audio professionals seeking accuracy and reliability. Its blend of performance, design, and functionality ensures that it stands out in the competitive field of nearfield monitors, delivering a listening experience that is both enjoyable and precise.
Top Page Image Contents