10
OPERATION AND USAGE
6.1. Start up
This will be done through the
POWER ON
(25) switch and the built-in indicator
immediately lights.
In a complete audio installation, it is important to start up the equipment in the following
sequence: sound sources, mixer, equalizers, active filters, processors and finally power
amplifiers. To turn them off the sequence should follow an inverse pattern.
6.2. Front panel LED indicators
The HZA4-120F is equipped with the following front panel LEDs:
•
STBY
indicator
(1):
illuminates when the amplifier is in standby (low consumption
mode), after approximately two minutes without any input signal detected. When
an input signal is re-detected, the amplifier automatically switches back to normal
operating mode.
•
Signal Presence indicators, SP
(2, 7, 12, 17): warn of the presence of signal at the
amplifier inputs. These indicators illuminate when the input signal exceeds -35dB.
•
Overload indicators,
OVL
(3, 8, 13, 18): illuminate when the channel reaches its
maximum power capacity, due to a too low load impedance.
•
CLIP
indicators
(4, 9, 14, 19): illuminate when the speakers output signal is close
to the actual clipping level. The CLIP system takes into account possible
fluctuations in the supply voltage if they exist, always giving a real indication. It is
normal when you work at high power levels that
CLIP
indicators illuminate to the
beat of the low frequencies, which are those with the higher energy content. Make
sure this doesn’t permanently illuminate indicators during normal operating mode.
•
Thermal protection indicators,
TH
(5, 10, 15, 20): indicate that the channel over-
temperature protection has been activated; normal operation will be restored when
the temperature returns to the correct operating temperature range.
•
MERGE
Indicators
: they indicate whether the
FLEXIPOWER
function that links two
adjacent channels have been activated with the switches on the rear panel or not.
