GTO SERIES
Multi-Element Speakers Owner’s Manual
GTO325 GTO425 GTO525 GTO625 GTO635 GTO6425 GTO7525 GTO925 GTO935
About These Instructions
Installation of automotive stereo components can require extensive experience with a variety of mechanical and
electrical procedures. Although these
instructions explain how to install
GTO Series multi-element speakers
in a general sense, they do not show
the exact installation methods for
your particular vehicle. If you feel
you do not have the experience, do
not attempt the installation yourself,
but instead ask your authorized JBL
car audio dealer about professional
installation options.
Loud Music and Hearing
Playing loud music in an automobile
can permanently damage your hearing, as well as hinder your ability to
hear traffic. The maximum volume
levels achievable with JBL speakers,
combined with high power amplification, may exceed safe levels for
extended listening. We recommend
using low volume levels when driving.
JBL accepts no liability for hearing
loss, bodily injury, or property damage as a result of use or misuse of
this product.
Rear Deck Precaution
In some cars, fuel tanks may be
located directly beneath the rear
deck. Before installation, make sure
there is adequate speaker-basket
clearance before considering
this location!
About the Crossover
Each GTO Series multi-element
speaker includes a built-in crossover
network and requires no additional
external circuits for proper operation.
To insure correct polarity connections,
each speaker is also equipped with
keyed terminals (see Figure 4 on
page 3).
General Care
The loudspeaker grilles may be
cleaned with a damp cloth. Do not
use any cleaners or solvents on the
grilles or the speaker cones.
Installation Tips
• Always wear protective eyewear
when using any tools.
• Turn off all audio components and
other electrical devices before you
start. Disconnect the negative (–)
lead from your vehicle’s battery.
• Keep speakers in their package
until final installation. When moving
a speaker, always rest it with the
cone or dome facing up. Never use
force to install any speaker.
• Check clearances on both sides of
a planned mounting surface before
drilling any holes or installing any
screws. Remember that the screws
can extend behind the surface.
• At the installation sites, locate and
make a note of all fuel lines,
hydraulic brake lines, vacuum lines
and electrical wiring. Use
extreme caution when cutting or
drilling in and around these areas.
• Before drilling or cutting holes, use
a utility knife to remove unwanted
fabric or vinyl to keep material
from snagging in a drill bit or saw.
• For door installations, check the
clearance with the windows
throughout the range of the
window’s travel, and verify that a
mounted speaker will not interfere
with the window crank or powerwindow mechanism.
• If mounting speakers elsewhere,
check for clearance around reardeck torsion bars, glove box or
other structural elements.
• Do not mount speakers where they
will get wet.
Installation Warnings and Tips JBLGTO Series Multi-Element Speakers
02
Figure 1. Mounting the GTO325, GTO425
or GTO525. Although not shown below, the
GTO625, GTO635, GTO925 and GTO935
all mount in a similar way.
Figure 2. Modifying the GTO325 or GTO425
for installation in locations requiring fewer
than four mounting “ears”.
NOTE: Bend tab back and forth to detach it
from the speaker.
Figure 3. Mounting the GTO6425 or, not
shown, the GTO7525.
Figure 4. The GTO’s keyed terminals aid in
making correct polarity connections.
03
Installation and Connections JBLGTO Series Multi-Element Speakers
Declaration of Conformity
We, Harman Consumer International
2, route de Tours
72500 Chateau-du-Loir
FRANCE
declare in own responsibility, that the products described in this owner’s manual are in
compliance with technical standards:
EN 50081-1:1992
EN 50082-1:1992
Lutz Uphoff
Harman Consumer International
Chateau-du-Loir, France. 3/01
ROTATE AND AIM TWEETER
SO IT FACES THE LISTENER
USING THE OMNIPIVOT™
FEATURE ON THE GTO525,
GTO625, GTO6525, GTO7525
AND GTO925.
Large Lug =
Small Lug =
JBL Consumer Products • 250 Crossways Park Drive, Woodbury, NY 11797 USA
1-800-336-4JBL (4525) www.jbl.com
©2001 JBL, Incorporated • JBL is a registered trademark of JBL, Incorporated
Made in USA Printed in USA 3/01 Part No. GTOMULTIOM3/01
04
Specifications JBLGTO Series Multi-Element Speakers
GTO325 GTO425 GTO525 GTO625
Type 3-1⁄ 2" 2-way 4" 2-way 5-1⁄ 4" 2-way 6-1⁄ 2" 2-way
Speaker Impedance 4 ohms 4 ohms 4 ohms 4 ohms
Power Handling 25W RMS, 75W peak 35W RMS, 100W peak 45W RMS, 135W peak 60W RMS, 180W peak
Sensitivity (2.83V, 1m) 92dB 92dB 92dB 92dB
Frequency Response 90Hz – 21kHz 90Hz – 21kHz 70Hz – 21kHz 55Hz – 21kHz
Mounting Depth 1- 3 ⁄ 8" (35mm) 2-1⁄8" (54mm) 2-3⁄16" (56mm) 2-1⁄16" (53mm)
Cut-out Diameter 3-1⁄4" (83mm) 3-9⁄16" (91mm) 4-5⁄ 8" (118mm) 5-1⁄16" (129mm)
GTO635 GTO6425 GTO7525 GTO925
Type 6-1⁄ 2" 3-way 4" x 6" 2-way 5" x 7" 2-way 6" x 9" 2-way
Speaker Impedance 4 ohms 4 ohms 4 ohms 4 ohms
Power Handling 60W RMS, 180W peak 40W RMS, 120W peak 60W RMS, 180W peak 100W RMS, 300W peak
Sensitivity (2.83V, 1m) 92dB 91dB 92dB 92dB
Frequency Response 55Hz – 21kHz 75Hz – 21kHz 50Hz – 21kHz 50Hz – 21kHz
Mounting Depth 2-1⁄16" (53mm) 1-5 ⁄8" (42mm) 2-3 ⁄16" (56mm) 2-7⁄8" (74mm)
Cut-out Diameter 5-1⁄16" (129mm)
5-11⁄16" x 3-1⁄ 4" (145mm x 83mm)
7-3 ⁄ 16" x 5" (183mm x 127mm)
8-3 ⁄ 4"x 5-15 ⁄16"(223mm x 151mm)
GTO935
Type 6" x 9" 3-way
Speaker Impedance 4 ohms
Power Handling: 100W RMS, 300W peak
Sensitivity (2.83 V, 1m) 92dB
Frequency Response 50Hz – 21kHz
Mounting Depth 2-7⁄8" (74mm)
Cut-out Diameter
8-3 ⁄ 4"x 5-15 ⁄16"(223mm x 151mm)
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