www.cleveracoustics.co.uk
ZM 84 Audio Mixer
User Manual
7
Operating instructions
18. Balanced Line Outputs – Zones 1-2
Balanced, +4dBu mono outputs for each of the two output zones. Each zone output features a male
XLR connector.
19. Audio BUS RJ45 Input
The ZM 84 features an RJ45 input port for linking multiple ZM 84 zone mixers. The input volume may
be adjusted using the Audio BUS Input Volume Control.
20. Emergency Mute Facility
The emergency mute facility provides system wide MUTE function. To activate the mute facility, use a
contact closure or relay to close the circuit between the two contacts of the Emergency Mute port.
21. AUX 1-3 Unbalanced Stereo Line Level Inputs
AUX inputs 1-3 each feature a pair of unbalanced, phono (RCA) sockets for line level input from audio
sources such as radio tuners, CD players or MP3 players.
22. MIC/Line 1-4 Gain, Phantom power (+48V) and 30dB pad controls.
Each of the MIC/Line inputs 1 thru 4 all feature controls for input gain, phantom power and 30dB
attenuation pad.
•
Input Gain: To allow the installer to match levels between audio sources, the ZM 84 features a
rotary input gain control for each channel. Turn the level control anti clockwise to the lowest setting,
or turn clockwise to adjust to the highest setting.
•
+48V Phantom Power: The ZM 84 features switchable phantom power on each of the MIC 1-4
channels for use with condenser type microphones. Selection of Phantom Power status should
be made before the zone mixer is powered on. Phantom Power relies on balanced cabling for
correct operation.
•
-30dB Attenuation Pad: To facilitate the use of line level audio sources, MIC/Line inputs 1-4 each
feature a switchable -30dB attenuation pad. If the input signal is too high or known to be from a line
level source, the attenuation pad should be switched on by pressing the switch to the IN position.
•
The ZM 84 features an 80Hz low cut filter, this can be activated via the internal jumper system.
To do so, a qualified engineer must power down the unit, disconnect from power and follow the
instructions in this manual to use the correct internal jumper.
23. MIC/Line 1-4 Balanced Audio Inputs
MIC/Line inputs 1-4 all feature balanced, mono audio inputs, each with selectable phantom
power (48V), -30dB attenuation pad and adjustable input gain (-60dB ~ +10dB) for use with MIC/
MIC+Phantom/Line signals.
24. Audio BUS RJ45 Output
The ZM 84 features an RJ45 output port for linking multiple ZM 84 zone mixers. The audio routing may
be selected via the internal jumper system.
