Operation And Usage; Start Up; Monitoring System; Channel Gain - Ecler HAK360 Manuel D'utilisation

4. OPERATION AND USAGE

4.1. Start up

To switch the mixer on push the switch labelled POWER (1) located in the back panel
- the two bottoms Vu-meter, ON leds will light up. Although the switching noise produced by
the HAK360 is very low and almost inexistent when starting up the HAK with the main faders
down, we highly recommend the "safe power­up sequence", which means that you should
switch on your audio devices in the following order:
1. Sound sources
2. Mixer, equalizers, active filters
3. Finally, power amplifiers.
Powering off should be done by following the exact reverse sequence in order to
avoid any possible damage to the loudspeakers.

4.2. Monitoring System

The HAK is equipped with a flexible and easy monitoring system that will allow the
performers to finely tune PFL (Pre-fader listening) and PGM (Program Monitor) levels of the
main inputs through the VU­METER and the HEADPHONES.
For HEADPHONES monitoring, the PGM/PFL switch (33) allows you to select between
post fader or pre-fader listening. In PFL position, the PFLs crossfader (35) allows you to quickly
fade between the two prelistening channels PFL.
The HAK360 VU-METER can display PFL Mono signals (VU1-PFL1 / VU2-PFL2) or
PGM Mix signal (Sum of PGM) through a PFL/PGM selector (34).

4.3. Channel gain

All the HAK360 input channels have accessible input sensitivity GAIN (20) and ADJ
(15) controls. These controls have the function of compensating for differences of level existing
between the sound sources connected to the table.
All input sensitivity adjustments must be done very carefully using the VU­METER
and/or headphones as a reference and avoiding that all the red LEDS of the VU­METER light up,
otherwise input could be clipped (Overload). MIC input gain control is located in back panel
ADJ (15).
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