JBL 408GTI, Руководство по установке

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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 film-type capacitors
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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408/508 MANUAL.QXP 7/17/98 11:21 AM Page 5