JBL GT 650P User Manual / Operation Manual ▷ View online
05
L
R
80
250
X-OVER
SIGNAL
POWER
VOLUME
L
R
+
+
–
–
HIGH
LEVEL
INPUT
INPUT
80
WATTS
LINE
LEVEL
INPUT
LEVEL
INPUT
+
–
SPEAKER
OUTPUTS
OUTPUTS
PREAMP OUTPUTS
MIN. AWG#12 POWER WIRE
IN-LINE FUSEHOLDER
WITH 15A FUSE
INSTALLED AT
VEHICLE
CHASSIS
GROUND
USE EITHER PREAMP
OR SPEAKER LEVEL
CONNECTION
Connection Diagram
GT Series Powered Subwoofers
SOURCE UNIT
12V
Figure 2
GT650P, 800P Powered Sub OM 7/15/98 10:57 AM Page 5
Equivalently, if you are using
the speaker-level connection,
you can connect the Powered
Subwoofer in parallel with the
speakers. The Powered
Subwoofer will sample the
signal, but will not load the
source unit the way a second
pair of conventional speakers
would, so you do not need to
worry that this connection will
lower the speaker impedance
too far for your amplifier or
source unit.
If you are using two GT Powered
Subwoofers, only one input
channel needs to be used on
each subwoofer.
Please refer to Figure 2 on
page 5 for a wiring diagram.
06
Adjustments
Volume Level and Crossover
Frequency (labeled ”X-Over”)
adjustments are done by ear. The
Crossover Frequency may be
adjusted over the range of 80Hz
to 150Hz. Midpoint on the X-Over
scale is at 125Hz. The knob at
“9:00” equals 100Hz, and at
“3:00” equals 175Hz.
1. We recommend starting your
setup procedure with the
volume control set at the
minimum, and the X-Over set
at the most counterclockwise
(80Hz) position.
2. Increase the volume level of
the source unit to the maxi-
mum listening position. This
is the point where the main
speakers in the system begin
to sound slightly distorted.
3. Back off on the source unit’s
volume control until just below
the point where you hear dis-
tortion. Slowly increase the
Powered Subwoofer volume
control until you begin to hear
slight distortion from the sub-
woofer. Mark or remember the
position of the Powered
Subwoofer volume knob and do
not exceed this point in subse-
quent adjustments.
4. Adjust the volume control so
that the bass level is balanced
to your taste from the listening
position.
Input Connections
Your GT Subwoofer may be
driven either with the preamp
output or speaker level output
of your source unit. The input
impedance of the GT amplifier
module is such that a “y-connec-
tor” may be used to connect your
source unit simultaneously to the
GT Subwoofer and an external
power amplifier used to drive the
main speakers when the preamp
level connection is used.
GT650P, 800P Powered Sub OM 7/15/98 10:57 AM Page 6
07
Model
GT650P
GT800P
Description
6-1/2" Powered Tube Subwoofer
8" Powered Tube Subwoofer
Maximum Output Power
80 Watts
80 Watts
Continuous Output Power
50 Watts @
<
1% THD
50 Watts @
<
1% THD
Crossover Frequency Range
80 – 250Hz
80 – 250Hz
Frequency Response
50 – 250Hz
40 – 250Hz
Dimensions (HxWxD)
12-1/8 x 8-1/8 x 12-1/8 inches
14 x 10-1/8 x 12-1/8 inches
308 x 206 x 308mm
356 x 257 x 308mm
Specifications
5. Slowly raise the crossover
frequency while listening for
the smoothest response. When
the frequency is properly
adjusted, bass will be solid
and powerful, but vocals will
not be overly bass heavy. If
the subwoofer seems to be
affecting the vocal range,
adjust the frequency
downward.
Service
Should your loudspeaker ever
need service, return it to
the JBL dealer from whom it
was purchased. If for some
reason this is impractical, call
800-336-4JBL for your nearest
warranty station. Do not return
products to the JBL factory
without prior authorization.
General Care
The loudspeaker grilles may
be cleaned with a slightly
damp cloth.
To remove dust from the carpet
use a vacuum with a brush
attachment. Spots on the
carpet may be removed with a
commercial spot remover.
Do not use any cleaners or
solvents on the grilles or the
speaker drivers.
Safety Note
To avoid the dangers of acciden-
tal suffocation, please properly
dispose of the plastic bag used in
the speaker packaging.
GT650P, 800P Powered Sub OM 7/15/98 10:57 AM Page 7
Declaration of Conformity
Kongevejen 194B
DK-3460 Birkerød
DENMARK
DK-3460 Birkerød
DENMARK
declare in own responsibility, that the products described
in this owner’s manual are in compliance with technical
standards:
EN 50 081-1/1992
EN 50 082-1/3.1995
Steen Michaelsen
Birkerød. DENMARK. 4/97
JBL Consumer Products
80 Crossways Park West
Woodbury, NY 11797
80 Crossways Park West
Woodbury, NY 11797
800-336-4JBL (4525)
Part No. GT650800OM
Made in USA
Made in USA
C
E
L E
B R A T I
N
G
5
0
Y E A
R
S
This is an important document. Attach
your bill of sale to this page and keep it
in a safe place. Your bill of sale is your
warranty.
The JBL warranty remains in effect for
one year from the date of the first con-
sumer purchase unless installed by an
authorized JBL dealer. Installation by
an authorized JBL dealer will extend the
warranty to a period of two years.
Who is Protected by this Warranty
The JBL warranty protects the original
owner and all subsequent owners provid-
ing that the JBL product was purchased
from an authorized dealer in the United
States or purchased by military person-
nel from an authorized military outlet.
A copy of the original dated bill of sale
must be presented whenever warranty
service is required.
What is Covered by this Warranty
Except as specified below, the JBL war-
ranty covers all defects in material and
workmanship. The following are not cov-
ered: Damage caused by accident, mis-
use, abuse, product modification or
neglect; damage occurring during ship-
ment; damage from failure to follow
instructions contained in the instruction
manual; damage resulting from the per-
formance of repairs by someone not
authorized by JBL; damage caused by
installation of parts that do not conform
to JBL specifications; units used for
commercial or business use; any claims
based on misrepresentations by the
seller; products sold on an “as-is” or
final sale basis; or the cost of installing,
removing, or reinstalling the unit. JBL’s
liability is limited to the repair or
replacement, at our option, of any
defective product and shall not include
incidental or consequential damages.
JBL reserves the right to replace a
discontinued model with a comparable
model. Any replacement units or parts
may be new or rebuilt.
To Obtain Warranty Service
If you require warranty service, please
return the product to your dealer. If this
is not possible and you live in the United
States, please call 1-800-336-4JBL, for
information on how to obtain service or
replacement.
If purchased outside the United States,
contact your local dealer for repair or
replacement.
Do Not Return Products to the JBL
Factory without Authorization. They will
be Returned Unopened.
You are responsible for transporting
your product for repair or replacement.
JBL will pay reasonable return charges
for delivery to any location in the United
States if the repair or replacement is
covered under the warranty.
Correspondence with JBL should be
addressed to: JBL Customer Service,
80 Crossways Park West, Woodbury,
NY 11797 or fax us at 516-496-0812.
Outside the United States, please con-
tact your local distributor.
This warranty gives you specific legal
rights. You may also have other rights
which vary from state to state. Some
states do not allow the exclusion or limi-
tation of incidental or consequential
damages or limitations on how long an
implied warranty lasts, so the above
may not apply to you.
Warranty Terms:
1 Year Transferable Limited Warranty / 2-Year Extended Transferable Limited Warranty
GT650P, 800P Powered Sub OM 7/15/98 10:57 AM Page 8
Display
