8
Independent Input Connections
Each channel has its own Local RCA input jack which is independent from the main Left and
Right input buses. To assign an amplifier channel to its independent input, move its Input
Assignment Switch to the furthest right Local position.
In the other three positions of this switch the amplifier channel will receive its signal from the
Left and/or Right Input Bus.
Examples of Input Configurations
Example 1: Configure a zone for stereo operation using Ch 1 and Ch 2.
1. Connect the left and right channel outputs from the system controller to the Left and Right
Main Input (Bus).
2. Set the Ch 1 Input Assignment switch to its L position.
3. Set the Ch 2 Input Assignment switch to its R position.
4. Connect Ch 1 Speaker Terminals to the left speaker.
5. Connect Ch 2 Speaker Terminals to the right speaker.
Example 2: Configure mono operation in two rooms in a zone using Ch 3 and Ch 4:
1. Connect the left and right output of the system controller to the Left and Right Input Bus.
2. Set the Ch 3 Input Assignment switch to its R+L position.
3. Set the Ch 4 Input Assignment switch to its R+L position.
4. Connect the Ch 3 Speaker Terminals to the speaker in room 1.
5. Connect the Ch 4 Speaker Terminals to the speaker in room 2.
Example 3: Configure stereo operation in a zone with independent inputs using Ch 5 and Ch 6.
1. Connect the left output of the source to the Ch 5 Local input jack.
2. Connect the right output of the source to the Ch 6 Local input jack.
3. Set the Ch 5 Input Assignment switch to its Local position.
4. Set the Ch 6 Input Assignment switch to its Local position.
5. Connect the Ch 5 Speaker Terminal to the left speaker.
6. Connect the Ch 6 Speaker Terminal to the right speaker.
Impedance Select Switch
The impedance select switch helps to prevent the Z-12 from overheating with low impedance
loads. This is accomplished by lowering the internal DC supply voltage.
If either channel of a channel pair (1 & 2, 3 & 4, 5 & 6, etc.) is connected to a 4
Ω
speaker load
(one 4
Ω
speaker or two 8
Ω
speakers, select 4
Ω
.
If both channels of the channel pair are connected to an 8
Ω
load, select 8
Ω
.
