Page 5
Rear Panel
1. Trigger Input and Output
The Trigger Input is used to allow other trigger-enabled equipment to switch the 4Z-75 between On
and Standby. The Trigger Output is always active when the 4Z-75 is On, and is used to control other
trigger-enabled equipment.
2. Master Volume (preset adjustment)
Sets the overall / maximum gain for the 4Z-75 (works in conjunction with the front
panel Volume knob).
3. Line Input Connectors (one per channel; unbalanced)
Connect your stereo input to these connectors.
4. Line Ouput Connectors (one per channel; unbalanced)
Provides a passthrough connector for connecting additional equipment.
5. Speaker Terminals (one pair per channel per zone)
Connect speakers to these five-way binding posts. Each zone has connections for one pair of stereo
speakers; speakers for each zone are individually relay switched.
6. Power Switch
Switches the AC mains power to the 4Z-75 On and Off. When this switch is Off, the 4Z-75 will not
respond to trigger signals or manual controls.
7. Input Voltage Selector Switch
Always ensure that this switch is set for the proper line voltage for your area and installation.
8. AC Line Fuse Holder
Always replace the fuse with a time delay (slow-blow) fuse of the same value.
9. Standard IEC power inlet.
The PA 18-45 can be used with either a two-wire or three-wire standard IEC power cable.
1 2 3
5
6
CH2 CH1 CH2 CH1 CH2 CH1 CH2 CH1
ZONE 4 ZONE 3 ZONE 2 ZONE 1 INPUT VOLTAGE FUSE
POWER
MASTER
VOLUME
IN
OUT
CH2 CH1
TRIGGER
INPUT
OUTPUT
7
8
9
4
