Optimus PM-804A Installation And Operating Instructions Manual page 16

PM-804A
8x4 Matrix Mixer
4. FRONT PANEL
1. Input channel EQ controls.
These controls allow to equalize the input signal ±12 dB at 80 Hz (LOW), 2.5 kHz (MID), and
12.5 kHz (HIGH), for CH1~CH4 inputs.
2. Signal LED indicators.
These LED indicators show current input signal on each input channel.
3. Peak LED indicators.
These LED indicators warn against saturation of the input channels. It is recommended to adjust
TRIM control on the rear panel accordingly when PEAK indicators are flickering to get better
performance.
4. Input channel volume.
These potentiometers allow to adjust volume level for each input channel.
5. Output channel selectors.
These selectors allow to route each input signal to selected output channels.
6. Output channel EQ controls.
Output channels have 2-band equalizer which is adjustable over a wide range as follows:
HIGH ±15 dB at 12 kHz, LOW  ±15 dB at 80 Hz.
7. Output level meter.
These indicators show audio output level. Signals of "Remote Mic" and "Alarm Message" are not
shown.
8. Clip LED indicators.
These LED indicators warn against saturation of the output channels. It is recommended to
adjust VOLUME control accordingly when CLIP indicators are flickering to get better
performance.
9. Mute switches.
These buttons allow to mute each output channel.
10. Output volume controls.
These faders allow to adjust the level of each output channel.
PM-804A Version 1.1 Page 4 of 11