JBL Grand touring series User Manual page 23

Simultaneous Speaker
Level + Line Level
In some systems it may be desir-
able to use both the speaker-level
inputs and line-level inputs simul-
taneously. For instance, if you
have a stock head unit in your car
YOU mav connect the speaker-level
inputs of the head unit to the
GTS18Ox. You mav simultaneously
connect a CD player equipped with
a volume control to the preamp-
level inputs of the GTS180x. The
Universal Interface circuitry of
the GTS180x will isolate the inputs
from each other while mixing both
signals. Therefore, switching from
one source to the other is as sim-
ple as turning the unused source
off and the desired source on. No
other switches or relay boxes are
needed.
When using this setup it is also
possible, using the wiring setup
shown at left, to allow either of
the two sources to remotely turn
on the amplifier. Whenever you
are using two sources to turn on
the amplifier it is necessary to
put diodes in series with the
remote line, as shown in the dia-
gram at left. The Common Sense
turn-on circuit will activate the
GTS180x when using the powered
source, and the conventional
remote connection of the preamp-
level source will activate the amp
when it is used.
Usins the Rem-Out Capability
When the GTS180x is driven by a
BTL head unit into the speaker-
level inputs and is remotely
turned on with the Common-
Sense circuit instead of a remote
in wire, the "REMOTE IN/OUT"
terminal is turned on to a +12V
signal so that other amplifiers or
signal processors can be re-
motely turned on bv the GTS180x
without the need for an additional
remote on/off wire. See the dia-
gram at right.
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