car audio power amplifier owner's manual gto75.2 II, gto75.4 II, gto755.6 II, gto301.1 II, gto601.1 II, gto1201.1 II

Subwoofer Right Left
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+
+
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+
–
GTO755.6 II 
(partial end panel)
5
APPLICATIONS – GTO755.6 II
The GTO755.6II can be configured for
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
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.
Subwoofer
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+
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+
+
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+
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+
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+
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GTO755.6 II 
(partial end panel)
S
ubwoofer
Rear
Right
Front
Right
R
ear
L
eft
F
ront
L
eft
Figure 9. 6-Channel operation: GTO755.6II amplifier driving full-range front and rear speakers and a pair of subwoofers.
S
ubwoofer
R
ear
R
ight
F
ront
R
ight
Rear
Left
Front
Left
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+
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+
+
–
+
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+
–
GTO755.6 II 
(partial end panel)
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: GTO755.6II amplifier configured for 3-channel operation, where all of the channels are
bridged for a subwoofer and a pair of component speakers.