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3.2 Typical Applications
The diagrams on pages 8 & 9 show
the most common basic system
configurations of the GTH400. One
or more of these building blocks may
be combined to form elaborate system
designs.
The GTH400 uses the terminology
“Group 1,” “Group 2” and “Group 3” to
indicate the three main signal paths
within the amplifier. Each “group” may
consist of a mono bridged signal or a
stereo pair of L+R signals depending
on the system configuration.
RL RL
– + – +
– + – +
L
+
L
–
R
+
R
–
L
+
L
–
L
+
L
–
R
+
R
–
R
+
R
–
– + – +
Application 1
6-Channel Bi-Amplified System with
Non-Fading Subwoofers
GTH400
GR 1
GR 2
GR 1
GR 2
GR 3
RL RL RL
Front Speakers Rear Speakers Subwoofers
Group 1 Group 2 Group 3
Mode Stereo Stereo Stereo
Group 2 Input – GR 2 –
Group 3 Input – – GR 1+2
Speaker Crossover High Pass High Pass Low Pass
Preamp Crossover – – –
– + – + – +
L
+
L
–
R
+
R
–
L
+
L
–
L
–
R
+
R
–
R
+
– + – +
Application 2
5-Channel Bi-Amplified System with
Non-Fading Mono Subwoofer
RL RL
Preamp or
Speaker-Level
Input
Front Rear
RL RL
GR 1
GR 2
GR 1
GR 2
GR 3
RL RL
Preamp or
Speaker-Level
Input
Front Rear
GTH400
Front Speakers
Satellite Speakers
Rear Speakers Subwoofer
Group 1 Group 2 Group 3
Mode Stereo Stereo L+R
Group 2 Input – GR 2 –
Group 3 Input – – GR 1+2
Speaker Crossover High Pass High Pass Low Pass
Preamp Crossover – – –
RL RL
GTH400-20107 06/03/98 15:49 Side 7