GTO 755.6 (serv.man13) - JBL Car Audio Service Manual (repair manual). Page 5

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CONNECTIONS

The GTO755.6 can be configured for 
6-channel, 5-channel or 3-channel
operation, as shown in 

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 
subwoofer inputs; e.g., if your source
unit has a subwoofer output.

NOTE: For simplicity, Figures 9 through
11 do not show power, remote and
input connections.

NOTE: Minimum speaker impedance
for stereo operation is 2 ohms.
Minimum speaker impedance for
bridged operation is 4 ohms.

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Figure 9. 6-Channel operation: GTO755.6 amplifier driving full-range front and rear speakers and a pair of subwoofers.

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Figure 10. 5-Channel operation: The same as Figure 9, with the subwoofer output bridged to drive a single 4-ohm subwoofer, 
providing the speaker with more power. 

Figure 11. 3-Channel operation: GTO755.6 amplifier configured for 3-channel operation, where all of the channels are
bridged for a subwoofer and a pair of component speakers.

GTO Amp OM  2/3/04  3:54 PM  Page 5

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