www.cleveracoustics.co.uk
MA 4120 480W Mixer Amplifier
User Manual
5
Layout identification:
1. Gain control:
The gain control is used to adjust the input gain (level) for each of the zone mixers input channels. Turn
the level control anti clockwise to the lowest setting, or turn clockwise to adjust to the highest setting.
Adjustments should be made gradually to avoid any sudden changes to the audio output. If the audio
source appears to sound distorted, a reduction in gain may be required.
2. HF level control:
During initial setup the high frequency tone adjustment should be set to the zero point (12’o’clock
position). Turn the level control anti clockwise to reduce the high frequency tones, or turn clockwise
to adjust the increase the high frequency tones. Adjustments should be made gradually to avoid any
sudden changes to the audio output.
3. LF level control:
During initial setup the low frequency tone adjustment should be set to the zero point (12’o’clock
position). Turn the level control anti clockwise to reduce the low frequency tones, or turn clockwise
to adjust the increase the high frequency tones. Adjustments should be made gradually to avoid any
sudden changes to the audio output.
4. Mute switch:
Press the mute switch to mute (silence) the selected input channel.
5. Mute LED:
The mute LED provides a visual indication when the input channel is in mute status.
6. Input channel level control:
The gain control is used to adjust the input gain (level) for each of the zone mixers input channels. Turn
the level control anti clockwise to the lowest setting, or turn clockwise to adjust to the highest setting.
Adjustments should be made gradually to avoid any sudden changes to the audio output. If the audio
source appears to sound distorted, a reduction in gain may be required. The input channel level control
adjusts the level of the selected input channel within the main mix.
7. Zone selection switches:
Each of the five input channels may be routed to any of the four output zones.
Press the switch to the IN position to route the selected input channel to the chosen output zone.
8. Headphone level control:
The headphone output volume is adjustable. Turn the level control anti clockwise to the lowest setting,
or turn clockwise to adjust to the highest setting.
9. Headphone output:
Utilising a standard 3.5mm stereo jack socket, the headphone output is used alongside the monitor
function to check the output of individual output zones. If none of the output zones are selected using
the monitor selection switches, the headphone output will be muted.
Operating instructions
