JBL 08 GTi User Manual / Operation Manual ▷ View online
21
above 5kHz if a 12dB per octave
crossover is used and at or
above 3.5kHz if you are using an
18 or 24dB per octave crossover.
For safety, the maximum recom-
mended amplifier power routed
directly to the 08GTi tweeter is
125 Watts RMS. In fact, due to
the nature of music, and the
reduced energy present at high
frequencies, there is little reason
to use an amplifier larger than
50 Watts per channel on the
tweeter, regardless of the
power of other speakers in
the system.
crossover is used and at or
above 3.5kHz if you are using an
18 or 24dB per octave crossover.
For safety, the maximum recom-
mended amplifier power routed
directly to the 08GTi tweeter is
125 Watts RMS. In fact, due to
the nature of music, and the
reduced energy present at high
frequencies, there is little reason
to use an amplifier larger than
50 Watts per channel on the
tweeter, regardless of the
power of other speakers in
the system.
08GTi Owners Manual 9/17/98 4:17 PM Page 21
A Note on Power
Handling
Handling
As a result of their high effi-
ciency, all JBL loudspeakers will
produce reasonable volume
levels in the automotive environ-
ment using very little amplifier
power. However, the use of a
small amplifier to attain very high
volume levels could lead to over-
driving the amplifier. This will
generate high distortion levels
which can easily damage loud-
speakers, even if the rated
power of the amplifier is below
the rated maximum power
handling of the loud-speaker!
produce reasonable volume
levels in the automotive environ-
ment using very little amplifier
power. However, the use of a
small amplifier to attain very high
volume levels could lead to over-
driving the amplifier. This will
generate high distortion levels
which can easily damage loud-
speakers, even if the rated
power of the amplifier is below
the rated maximum power
handling of the loud-speaker!
As a general rule, do not
turn up the volume control past
the point where you hear distor-
tion in the form of either signal
distortion from an overdriven
amplifier or mechanical noise
from an overstressed speaker.
For the best performance and
system reliability, you should
select an amplifier with an output
rating greater than the maximum
power likely to be used to gener-
ate the desired volume levels. If
you want your system “Loud +
Clear,” we suggest that you step
up to a JBL power amplifier
which has an RMS power rating
equal to, but not exceeding, the
the point where you hear distor-
tion in the form of either signal
distortion from an overdriven
amplifier or mechanical noise
from an overstressed speaker.
For the best performance and
system reliability, you should
select an amplifier with an output
rating greater than the maximum
power likely to be used to gener-
ate the desired volume levels. If
you want your system “Loud +
Clear,” we suggest that you step
up to a JBL power amplifier
which has an RMS power rating
equal to, but not exceeding, the
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08GTi Owners Manual 9/17/98 4:17 PM Page 22
23
Maximum Recommended
Amplifier Power listed in the
specifications of your specific
JBL speaker. This margin of
reserve power will ensure that
the amplifier will not attempt to
deliver more power than its
design allows. Your dealer will
be happy to point out which high
power JBL amplifiers are opti-
mum for your application and lis-
tening habits.
Amplifier Power listed in the
specifications of your specific
JBL speaker. This margin of
reserve power will ensure that
the amplifier will not attempt to
deliver more power than its
design allows. Your dealer will
be happy to point out which high
power JBL amplifiers are opti-
mum for your application and lis-
tening habits.
Following these guidelines
will provide virtually distortion
free sound reproduction and long
loudspeaker life.
free sound reproduction and long
loudspeaker life.
In Case of Difficulty
The most common difficul-
ties are noise, distortion, and
intermittent connections.
intermittent connections.
System noise is usually not
the fault of the 08GTi. Hiss or
“alternator whine” is most often
the result of faulty grounding of
the system electronics or improp-
er setting of amplifier level con-
trols. An exception to this is if
the protection network or passive
crossover is mounted near a
source of radiated noise, the net-
work may pick-up this noise with
sufficient power to drive the
08GTi tweeters. For this reason,
“alternator whine” is most often
the result of faulty grounding of
the system electronics or improp-
er setting of amplifier level con-
trols. An exception to this is if
the protection network or passive
crossover is mounted near a
source of radiated noise, the net-
work may pick-up this noise with
sufficient power to drive the
08GTi tweeters. For this reason,
08GTi Owners Manual 9/17/98 4:17 PM Page 23
be careful not to mount any pas-
sive crossover components near
wires carrying high currents such
as battery cables or wires lead-
ing to ammeters or tachometers.
sive crossover components near
wires carrying high currents such
as battery cables or wires lead-
ing to ammeters or tachometers.
Distortion is usually the
result of overdriving one or more
components in the system. The
problem is most likely insufficient
amplifier power, or improper set-
ting of gain controls. Refer to
the instructions which came with
the electronics for assistance.
The 08GTi will sound distorted if
it is used without a crossover or
protection network. It will also
not last very long. Never use
the 08GTi without one of the
components in the system. The
problem is most likely insufficient
amplifier power, or improper set-
ting of gain controls. Refer to
the instructions which came with
the electronics for assistance.
The 08GTi will sound distorted if
it is used without a crossover or
protection network. It will also
not last very long. Never use
the 08GTi without one of the
recommended crossover
options.
options.
If you want to talk to us
about any problems, call JBL
Customer Service at 1-800-336-
4JBL(4525) between 9AM and
5PM eastern time.
Customer Service at 1-800-336-
4JBL(4525) between 9AM and
5PM eastern time.
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08GTi Owners Manual 9/17/98 4:17 PM Page 24
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