Maxgear MAX 7136 Mode D'emploi page 4

MAX 7136
Professional PA amplifier
INSTALLATION
Preventing or identifying interference
First of all, check that the amplifier is installed in a place free from industrial of RF (radio frequency)
interference. Avoid installing your equipment very near radio or TV sets, mobile phones, etc., as these
can cause noisy interference.
When connecting the other components of your sound system, watch out for the so-called round
loops, which could cause hum and jeopardize the amplifier excellent Signal-to-Noise and low distor-
tion characteristics.
The best way (even if not always feasible) to avoid ground loops is to connect the electric ground of
all the equipment to a single central point ( the so-called star system). In this case, the central point
in sound systems is the mixer.
To help identify the cause of any interference, connect the various sections of the mixer to the rest
of the equipment in the following order, listening to the resul tant sound as your proceed wi th con-
nection: Outputs: amplifiers + loudspeaker enclosures (Master outputs) ; amplifiers + moni tors (AUX
outputs) ; effects (AUX outputs or EFF send/return).
Inputs: Instruments with line signals (keyboards, samplers, recorders, etc.); Microphones (lastly and
one by one).
MAX 7136
4 2 5 1
3
CONTROLS
1. Power on/off
ON - OFF swi tch.
2. Power on LED
LED indicating when the amplifier is switched on.
3. Input attenuators
Input gain attenuator potentiometers. Attenuate the level of the external signal sent to the respective
channels of the amplifier. Continuously variable values, expressed in dB, are between:
fully closed (the signal is completely attenuated and therefore not sent to the channel of the amplifier)
and fully open, i.e. nominal level (the signal is not attenuated in any way, so is fed to the amplifier chan-
nel at the same level at which it arrives on input)
4. Signal LEDs
Indicators of signals on input. If lit, indicate that the relative inputs of the amplifier channels are recei-
ving an audio signal.
5. Clip LEDs
Amplifier CLIPPING indicators. Indicate the clipping of the amplifier, i. e. when the audio signal level
exceeds the output capacity of the amplifier channel. When these LEDs flash reduce the input signal level.