JBL Car Amplifier GTO3501 User Manual

GTO3501  
OWNER’S MANUAL  
 
GTO3501 CAR AUDIO SUBWOOFER AMPLIFIER OWNER’S MANUAL  
Installation Warnings and Tips:  
Disconnect the negative (–) lead from your vehicle’s  
battery.  
Speaker Output Connectors  
DBO (Dynamic Bass Optimization) Variable  
Subsonic High-Pass Filter With Variable Boost (Q)  
For woofers in tuned (vented) enclosures, set  
the Frequency control to a value 10Hz below the  
enclosure’s resonance (tuned) frequency.  
For woofers in sealed boxes, set the control to  
any value you prefer between 30Hz and 50Hz.  
Set the Boost control according to your  
preference, being careful not to apply  
enough boost to damage your woofer(s).  
A DBO High-Pass Filter Frequency control,  
variable between 10Hz and 100Hz. See  
above for appropriate settings.  
B DBO Boost control provides up to  
12dB of boost slightly above the high-  
pass filter’s frequency. See above for  
appropriate settings.  
Optional Remote Level Control (RLC) Connector  
Connect the Remote Level Control (RLC) here,  
using the RJ-11 cable (Supplied with the RLC).  
Power On LED  
Connect the subwoofer to these terminals,  
observing proper polarity. Either + or –  
terminal may be used. Minimum total  
impedance is 2 ohms.  
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.  
Choose a safe mounting location away from moisture.  
Make sure there is sufficient air circulation at the  
mounting location for the amplifier to cool itself.  
Mount the amplifier, using the supplied hardware.  
Fuses  
Replace only with the same type and rating.  
Power Input Connectors  
+12V: Connect to the positive terminal of the  
vehicle’s battery. 8 AWG wire is recommended.  
Install an appropriate fuse holder and fuse (60A  
minimum) within 18 inches of the battery. Make  
sure the wire is not damaged or pinched during  
installation. Install protective grommets when  
routing wires through the firewall or other sheet  
metal.  
Specifications  
225W RMS x 1 channel @ 4 ohms and 1% THD + N*  
<
360W RMS x 1 channel @ 2 ohms, 14.4V supply and  
<
1% THD + N*  
GND: Connect to the vehicle’s chassis. Refer to  
the picture below.  
Frequency response: 20Hz – 330Hz (–3dB)  
Maximum input signal: 6V*  
Maximum sensitivity: 100mV*  
THD + N: 0.04%  
Signal-to-noise ratio: 85dBA  
(reference 1W into 4 ohms)*  
Signal-to-noise ratio: 104dBA  
(reference rated power into 4 ohms)  
* CEA-2006A-compliant  
Factory Bolt  
Ring Connector  
Ground Wire  
Illuminated when the amplifier is on.  
Protect LED  
Illuminated under any of the following fault  
conditions: battery over/under voltage, short  
circuit in speaker wires, amplifier is too hot,  
amplifier’s output circuit has failed (DC voltage  
is present in the amplifier’s output).  
Setting Input Level  
Note: Remove any paint  
below ring connector.  
Star Washer  
REM: Connect to the “Remote Out” lead from  
the source unit or to a source of switched  
12V+ (ACC).  
A Turn Input Level control counterclockwise to  
6V (minimim).  
B With a dynamic music track playing, turn the  
head unit’s volume control to the 3/4 position.  
C Turn Input Level control clockwise until the  
bass output is proportionate to the output of  
the high-frequency speakers, according to  
your preference.  
Aux Output Connectors (RCA)  
Nonfiltered pass-through output. Connect to the  
input of an additional amplifier.  
Input Connectors (RCA)  
Connect to the RCA outputs from the source unit  
or signal processor.  
Input-Level Control  
D Input level is now adjusted correctly.  
Setting the Crossover  
Used to match the input level of the amplifier  
to the output level of the source unit.  
See for the adjustment procedure.  
Low-Pass Filter Frequency Control  
12dB/octave low-pass filter,  
A Crossover setting for subwoofers.  
Note: Acceptable frequency ranges are indicated  
in gray.  
Remote Level Control (Optional)  
The Remote Level Control, if installed, will allow  
you to adjust the level of bass while seated in the  
listening position.  
variable from 32Hz to 320Hz.  
See  
for the adjustment procedure.  
This product is designed for mobile applications and is not  
intended for connection to the mains.  
A valid serial number is required for warranty coverage.  
Features, specifications and appearance are subject to change  
without notice.  
 
Declaration of Conformity  
We, Harman Consumer Group, Inc.  
2, route de Tours  
72500 Château du Loir  
France  
Harman International, Consumer Division  
8500 Balboa Boulevard, Northridge, CA 91329 USA  
declare in own responsibility that the product described in this owner’s  
manual is in compliance with technical standards:  
EN 55013:2001+A1:2003  
© 2009 Harman International Industries, Incorporated. All rights reserved.  
JBL is a trademark of Harman International Industries, Incorporated,  
registered in the United States and/or other countries.  
EN 55020:2002+A1:2003  
Klaus Lebherz  
Harman Consumer Group, Inc.  
Château du Loir, France 3/08  
Part No. GTO3501OM 3/08  
www.jbl.com  
 

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