Installing JBL tie-down straps
with your JBL subwoofer
GT650P or GT800P.
04
Figure 1
Securing Your Speakers
The GT Subwoofers must be
securely fastened to the vehicle
with screws, brackets, and/or the
included tie-down straps to pre-
vent movement of the speaker
system while the car is in motion.
A secure mounting will also
improve the bass performance.
Again, because each vehicle is
different, your ingenuity will play
a major role in how and where
you mount your unit. If you do
not feel that you have the skills
or the tools necessary to properly
and safely mount your unit,
please refer the installation to an
authorized JBL dealer. Refer to
Figure 1 for a diagram of how to
use the tie-down straps to secure
the subwoofer to its mounting
surface. When using the strap,
make sure that it is pulled tight.
Wiring
Power Connections
Connect the Black ground wire
coming from the amplifier mod-
ule to the vehicle chassis. Keep
this wire as short as possible. If
you need to extend it, use a mini-
mum #12AWG stranded copper
wire.
Connect the Red wire to a source
of constant
+
12V power. If you
are installing your unit in a sys-
tem which uses a high-quality
power distribution system, your
GT Powered Subwoofer can be
connected to an unused output of
a distribution block. Otherwise,
the power wire should be
extended with a minimum
#12AWG power cable and con-
nected directly to the vehicle
battery. Install a fuseholder with
a 15-amp fuse at the battery end
of this cable. Keep the fuseholder
as close as possible to the battery
(within 18" if possible) and be
sure that it is installed between
the battery and the point where
the wire passes through the fire-
wall or the closest metal panel.
A high-value power supply
capacitor mounted close to the
GT Subwoofer will enhance its
performance.
GT650P, 800P Powered Sub OM 7/15/98 10:57 AM Page 4
