and high frequency transducers in a high quality system, we recommend you use either a high quality active crossover such as JBL’s GTX47, GTX4 or GTX2 to provide optimum matching to your subwoofer or woofer/midbass loudspeaker. If you prefer passive crossovers, we recommend that you use only high quality audiophile grade
and Low DCR inductors to get the most out of your system. The most popular system configuration is a hybrid using an active crossover for the subwoofer to woofer/midrange crossover point, and a passive crossover for the woofer/midrange to tweeter crossover. Your GTi Competition Series Dealer is uniquely qualified to help guide you on the best system configuration for your needs.
Component Placement
The location of each of the loudspeakers plays a vital role in achieving proper frequency response and spacious imaging. Because the 408 and 508GTi systems have an extremely wide and
smooth dispersion pattern, excellent performance may be achieved in any vehicle. Due to the wide variety of vehicles, there is not one “right” way to locate the 408 and 508GTi, however knowledge of the following considerations will help you get the most from your system:
1.The most spacious stereo image is achieved when the speakers are placed as wide apart as possible.
2.The best center image will be achieved when the distance from the left speaker to your left ear is as equal as possible to the distance from the right speaker to your right ear. This is most easily achieved by placing the 408 or 508GTi as far forward as you can.
3.The best system integration is achieved when the woofer/midrange is mounted close to the tweeter. Installing the tweeter close to the woofer/midrange helps smooth the transition from woofer/midrange to tweeter at the crossover point.
4.You will get the best frequency response when the path from the speakers to your ear is unobstructed.
5.Because of the high acoustic energy capability of the 408 and 508GTi, the woofer/midrange drivers must be securely mounted in a rigid panel which is free from resonances, rattles and air leakage.
Installation Warnings and Tips
•Be careful not to cut or drill into fuel tanks, fuel lines, brake or hydraulic lines, vacuum lines or electrical wiring when working on your vehicle. Inspect behind panels before you cut or drill.
•Be sure to check for clearance of window, cranks and linkages when mounting speakers in door panels.
•Do not use the speakers unmounted. Failure to securely mount this product could result in damage or injury, particularly in the event of an accident.
•Although the materials used on the 408 and 508GTi are inherently water resistant, do not mount the speakers where they will get wet.
•Always disconnect the ground wire from the battery before doing any work on the vehicle.
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