®
GRAND TOURING
SERIES
GTO1014
GTO1014D
GTO1214
GTO1214D
GTO1514
GTO1514D
THANK YOU
®
®
for purchasing a JBL Grand Touring Series subwoofer.
Subwoofer installation requires woodworking skills and some
experience in disassembling and reassembling automotive
interiors. If you lack the tools or necessary skills, have your
subwoofer installed by an authorized JBL dealer.
CONNECTING YOUR SUBWOOFER TO YOUR AMPLIFIER
JBL Grand Touring Series GTO
subwoofers are available in two
different configurations: a single
4-ohm voice coil or dual 4-ohm
voice coils. You may use GTO
subwoofers in singles or multiples
to maximize the power available
from your amplifier(s). To achieve
the maximum amplifier output
possible, you should design a
speaker system that provides
the lowest impedance that your
amplifier will drive safely. When
designing a subwoofer system,
consider the following rules:
2. You may connect the coils of a
dual-voice-coil woofer in series,
but we recommend that you avoid
connecting separate woofers in
series.
To design a subwoofer system
that maximizes available amplifier
power, keep the following rules
in mind:
Figure 1. Parallel connection
1. The total system impedance
of woofers in parallel can be
calculated using the formula:
3. You must use both coils of a dual-
voice-coil woofer connected
either in series or in parallel.
1
Figure 2. Series connection
Impedance=
1
w1
1
1
w3
...
4. Most amplifiers deliver exactly
the same amount of power
bridged into a 4-ohm load as
they do running a 2-ohm stereo
load.
+
+
w2
where w is the nominal
impedance of the woofer.
2. The total system impedance
of voice coils (or woofers) in
series can be calculated using
the formula:
1. Do not mix different subwoofers
or enclosure types in the same
system. Subwoofers being used
in the same enclosure or
powered by the same amplifier
should be identical models.
Mismatched woofers and
enclosures can result in poor
performance from your subwoofer
system.
Impedance = w1 + w2 + w3 ...
The diagrams at right show parallel
and series speaker connections.
3
SPECIFICATIONS
GTO1014
10" 4-Ohm
Subwoofer
GTO1014D
10" Dual 4-Ohm
Subwoofer
GTO1214
12" 4-Ohm
Subwoofer
GTO1214D
12" Dual 4-Ohm
Subwoofer
GTO1514
15" 4-Ohm
Subwoofer
GTO1514D
15" Dual 4-Ohm
Subwoofer
Power Handling, RMS
Power Handling, Peak
Sensitivity (2.83V/1m)
Frequency Response
Impedance
350W
350W
350W
350W
350W
350W
1400W
1400W
1400W
1400W
1400W
1400W
88dB
91dB
90dB
93dB
93dB
96dB
25Hz – 400Hz
4 Ohms
25Hz – 400Hz
8 Ohms/2 Ohms
5-7/8" (148mm)
9" (228mm)
23Hz – 400Hz
4 Ohms
23Hz – 400Hz
8 Ohms/2 Ohms
6-5/16" (160mm)
11" (278mm)
23Hz – 400Hz
4 Ohms
23Hz – 400Hz
8 Ohms/2 Ohms
Mounting Depth
5-7/8" (148mm)
9" (228mm)
6-5/16" (160mm)
11" (278mm)
6-13/16" (172mm) 6-13/16" (172mm)
13-15/16" (354mm) 13-15/16" (354mm)
Cutout Diameter
Overall Diameter
10-9/16" (268mm) 10-9/16" (268mm) 12-5/16" (313mm) 12-5/16" (313mm) 15-5/16" (389mm) 15-5/16" (389mm)
A valid serial number is required for warranty coverage.
Features, specifications and appearance are subject to change without notice.
These products are designed for mobile applications and are not intended for connection to the mains.
Declaration of Conformity
Harman Consumer Group, Inc.
250 Crossways Park Drive, Woodbury, NY 11797 USA
We, Harman Consumer Group, Inc.
2, route de Tours
72500 Château du Loir
France
declare in own responsibility that the products described in this owner’s
manual are in compliance with technical standards:
© 2008 Harman International Industries, Incorporated. All rights reserved.
JBL and Grand Touring Series are trademarks of Harman International Industries,
Incorporated, registered in the United States and/or other countries.
EN 61000-6-3:2001
EN 61000-6-1:2001
Klaus Lebherz
Harman Consumer Group, Inc.
Château du Loir, France 3/08
Part No. GTO-14SUBOM3/08
www.jbl.com
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