Read JBL 600 GTi User Guide / Operation Manual online
Wiring
Use 2-conductor stranded type,
insulated wire to connect the 600GTi
Woofer/Midbass and Tweeter to the
included crossover, and the crossover to
the amplifier as shown in Figure B. A
minimum wire gauge of 18AWG is
recommended, with larger size suggested
for wire runs longer than 10 feet.
Woofer/Midbass and Tweeter to the
included crossover, and the crossover to
the amplifier as shown in Figure B. A
minimum wire gauge of 18AWG is
recommended, with larger size suggested
for wire runs longer than 10 feet.
The polarity (the positive / negative
orientation of the connections) for every
speaker and crossover to amplifier
connection must be consistent from left to
right channel to assure proper imaging and
optimum frequency response. This does
not mean that the 600GTi should always
be connected in the same polarity as the
other drivers in the system however. It is
possible, that due to the difference in the
distance the sound travels from the
woofer/midbass to your ears compared to
the distance from the woofer/midrange or
subwoofer in a typical system, and the
short wavelengths of sound at the
crossover frequency, that a connection
where the midranges or subwoofers are
connected in reverse polarity from the
600GTi Drivers may actually result in
better sound. Because there is no way to
accurately predict this before installation,
we recommend that you try the connection
both ways, and leave it in the polarity that
gives the smoothest audible transition
between the woofer/midbass, subwoofer
and/or midrange. When the subwoofer,
midrange, and midbass drivers are
speaker and crossover to amplifier
connection must be consistent from left to
right channel to assure proper imaging and
optimum frequency response. This does
not mean that the 600GTi should always
be connected in the same polarity as the
other drivers in the system however. It is
possible, that due to the difference in the
distance the sound travels from the
woofer/midbass to your ears compared to
the distance from the woofer/midrange or
subwoofer in a typical system, and the
short wavelengths of sound at the
crossover frequency, that a connection
where the midranges or subwoofers are
connected in reverse polarity from the
600GTi Drivers may actually result in
better sound. Because there is no way to
accurately predict this before installation,
we recommend that you try the connection
both ways, and leave it in the polarity that
gives the smoothest audible transition
between the woofer/midbass, subwoofer
and/or midrange. When the subwoofer,
midrange, and midbass drivers are
mounted close to each other, the in-phase
connection will usually yield the best
sound. Active crossovers such as the JBL
GTX47 sometimes include a phase switch
that lets you easily try both polarities by
merely flipping the switch polarity.
connection will usually yield the best
sound. Active crossovers such as the JBL
GTX47 sometimes include a phase switch
that lets you easily try both polarities by
merely flipping the switch polarity.
System Connections
There are a variety of system options
available with the 600GTi. The simplest
configuration is to use the 600GTi low
passed. In this situation, the 600GTi is
used as a small subwoofer. In small
vehicles at moderate power levels this will
yield good sound. You may also wish to
use the 600GTi in multiples, for example
four 600GTi Drivers will move nearly the
same air volume as a pair of 10" drivers.
This is a good solution when you have a
narrow area that won’t fit larger diameter
subwoofers. The best performance will be
achieved in a high-end 4-way system
which includes subwoofers and additional
midrange and high frequency transducers.
Here the 600GTi is at its best, adding
impact and power to the midbass
configuration is to use the 600GTi low
passed. In this situation, the 600GTi is
used as a small subwoofer. In small
vehicles at moderate power levels this will
yield good sound. You may also wish to
use the 600GTi in multiples, for example
four 600GTi Drivers will move nearly the
same air volume as a pair of 10" drivers.
This is a good solution when you have a
narrow area that won’t fit larger diameter
subwoofers. The best performance will be
achieved in a high-end 4-way system
which includes subwoofers and additional
midrange and high frequency transducers.
Here the 600GTi is at its best, adding
impact and power to the midbass
7
AMPLIFIER
AMPLIFIER
HEAD
UNIT
ACTIVE
X-OVER
AMPLIFIER
HEAD
UNIT
PASSIVE
X-OVER
AMPLIFIER
AMPLIFIER
tweeter
JBL 08GTi
tweeter
JBL 08GTi
midrange
JBL 400GTi
midrange
JBL 400GTi
midbass
JBL 600GTi
midbass
JBL 600GTi
woofer
JBL 1200GTi
woofer
JBL 1200GTi
Figure B
600 MANUAL/vs2.QXP 7/28/98 11:47 AM Page 7
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