JBL GTS100 - Manual (Page 17)

Speaker Level Input Color Codes
Left (+): White
Left (-): White with Black Stripe
Right (+): Gray
Right (-): Gray with Black Stripe
Using Both the Speaker Level Input
and Line Level Input Together
In some systems it may be desirable to
use both the speaker level inputs and
line level inputs simultaneously. For
instance, if you have a stock head unit
in your car you may connect the speaker-
level inputs of the head unit to the
GTS100. You may simultaneously con-
nect a CD player equipped with preamp
volume control to the preamp-level
inputs of the GTS100. The Universal
Interface circuitry of the GTS100 will
isolate the inputs from each other while
mixing both signals. Therefore switch-
ing from one source to the other is as
simple as turning the unused source
off, and turning 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 below, to
allow either of the two sources to
remotely turn on the amplifier. This is
not necessary if the factory radio is of
the high power BTL type and is con-
nected to the speaker level inputs. The
Common Sense turn-on circuit will acti-
vate the GTS100 when a powered
source is used, and the conventional
remote connection of the preamp-level
source will activate the amp when it is
used.
17
Speaker Connections
When connecting speaker wires, be
sure that no uninsulated wire remains
exposed and no loose strands of wire
touch either an adjoining wire, terminal
or a metal surface. Securely crimp or
solder all connections and insulate
them with heatshrink tubing.
Use high quality 18 gauge or larger
speaker wire for the amplifier to speaker
connections. Larger wire or special high
performance speaker cables may
improve the performance of some
systems.
Be very careful when speaker wire is
routed through a door hinge area to
door mounted speakers. Use grommets
and strain reliefs wherever necessary to
prevent damage to the wires.
The proper speaker connection
depends on whether the GTS100 is
used bridged or stereo. The speakers
are connected to the amplifier with the
included wire harness. If you wish to
purchase the raw connector to make a
custom-length harness, the part number
is listed in the Specifications section.
This item is commonly available from
local electronic parts distributors.
From Head
Unit #1
Remote or
Antenna Output
Dual Source Remote Wiring diagram.
From Head
Unit #2
Remote or
Antenna Output
To
GTS100
Remote
1N4001
Diode
1N4001
Diode
JBL 1394 Manual 7/17/98 11:49 AM Page 17