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GRAND
®
TOURING
SERIES II
gto75.2 II
gto75.4 II
gto755.6 II
gto301.1 II
gto601.1 II
gto1201.1 II
car audio
power amplifier
owner’s manual
THANK YOU
®
for purchasing a JBL Grand Touring Series II amplifier.
In order that we may better serve you should you
require warranty service for your new amplifier, please
retain your original purchase receipt and return the
enclosed warranty registration card.
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INSTALLATION WARNING: Playing loud music in an • Before drilling or cutting holes, use a POWER CONNECTIONS Speaker Connections automobile can hinder your ability to hear utility knife to remove unwanted fabric The GTO amplifiers are capable of Refer to the application guides on the traffic and permanently damage your or vinyl to keep material from snagging delivering extremely high power levels, pages that follow. Speaker connections hearing. We recommend lis
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APPLICATIONS – GTO301.1 II, GTO601.1 II AND GTO1201.1 II The GTO subwoofer amplifiers are single-channel amplifiers. There are two sets of terminals to make it easy to connect multiple woofers. Either set of (+/–) terminals may be used when connecting woofers. To the right are two application diagrams to help plan your subwoofer GTO Amplifier
GTO Amplifier
(partial end panel) (partial end panel) system installation. Figures 2 and 3 show how to configure the GTO +
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APPLICATIONS – GTO75.4 II The GTO75.4 II can be set up for stereo –
4-channel, 3-channel or bridged + 2-channel operation, as shown in Figures 6 through 8. NOTE: For simplicity, Figures 6 through 8 do not show power, remote and input connections. NOTE: Minimum speaker impedance for stereo operation is 2 ohms. GTO75.4 II
Minimum speaker impedance for (partial end panel) + bridged operation is 4 ohms. –
Figure 6. GTO75.4 II amplifier in 4-channel (stereo) operation to drive f
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APPLICATIONS – GTO755.6 II Rear
Front
The GTO755.6 II can be configured for Subwoofer Right Right 6-channel, 5-channel or 3-channel –
–
+ operation, as shown in Figures 9 + through 11. Input Mode Switch: • Use INT (internal mode) to send a signal from the front and rear inputs to the subwoofer. • Use EXT (external mode) when sending a dedicated signal to the GTO755.6 II
subwoofer inputs; e.g., if your source (partial end panel) unit has a subwoofer output. –
–
+ + N
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INSTALLATION AND SETUP SETTING THE SETTING INPUT REMOTE LEVEL CONTROL INSTALLING NEON TUBES CROSSOVER(S) SENSITIVITY The GTO755.6 II and all three GTO (OPTIONAL) Determine your system plans and set the 1. Initially turn the INPUT LEVEL control(s) subwoofer amplifiers have inputs for 1. Using a Phillips screwdriver, remove all crossover mode switch accordingly. If to minimum (counter clockwise). an optional remote level control (RLC). screws on the amplifier’s output/p
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INSTALLATION AND SETUP To Neon
Power
Supply To Neon
Power
Supply Figure 13. Installing neon tubes in a JBL GTO amplifier. TROUBLESHOOTING SYMPTOM LIKELY CAUSE SOLUTION SYMPTOM LIKELY CAUSE SOLUTION No audio No voltage at BATT+ Check voltages at No audio Voltage more than 16V Check vehicle (POWER LED or REM terminals, amplifier terminals (PROTECT or less than 8.5V on charging system for is off) or bad or no ground with VOM LED is on) BATT+ connection defective voltage connection r
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SPECIFICATIONS GTO301.1II GTO601.1II GTO1201.1II • 204W RMS x 1 channel at 4 ohms and ≤1% THD + N • 424W RMS x 1 channel at 4 ohms and ≤1% THD + N • 787W RMS x 1 channel at 4 ohms and ≤1% THD + N • Signal-to-noise ratio: 77dBA (reference 1W into 4 ohms) • Signal-to-noise ratio: 72dBA (reference 1W into 4 ohms) • Signal-to-noise ratio: 70dBA (reference 1W into 4 ohms) • 294W RMS x 1 channel at 2 ohms, 14.4V supply and • 580W RMS x 1 channel at 2 ohms, 14.4V supply and • 1114W RM
