Considerations; Ground Loops, Background Noise; Cleaning - Ecler AC-6 Manual De Instrucciones

5. CONSIDERATIONS

5.1. Ground loops, background noise

Please make sure that the signal sources that arrive to the mixer and the devices connected to its
outputs have separated grounds, so that every device has just one possible ground connection, which
avoids the generation of hum, that could even degrade the quality of the sound playback.
If the cable's shields are connected to the chassis, they cannot be connected among each other
in order to avoid creation of ground loops.
The AC-6 mixer has been designed to obtain the lowest possible background noise. However,
independently of the electronic conception, the background noise depends directly on the correct
installation and manipulation of the mixing unit.
It is not the same, having a channel FADER at level "2" and the MASTER at level "10" or vice
versa. In the first case, the signal that arrives to the mixing amplifier and has a certain noise level, is
weak, so that the signal/noise ratio is low (poor signal). When the output amplifier raises the level of this
signal, the noise level obtained at the output will be high. In the second case, having the FADER to
maximum, the signal level which arrives to the mixing amplifier is high and therefore the signal/noise
ratio is also high, so that the output signal will maintain a better ratio than in the first case.

5.2. Cleaning

The control panel should never be cleaned with solvent or abrasive substances as it could
become damaged. To clean it, use a slightly moist soft cloth, together with a neutral liquid detergent, and
then dry it with a clean cloth. It is advisable to remove all sweat stains after use. Be careful to ensure
that water never enters the machine through any of the openings.
9