Further Considerations; Ground Loops; Audio Connections; Background Noise - Ecler nuo 2 Manual De Instrucciones

6. FURTHER CONSIDERATIONS

6.1. Ground loops

Ensure at all times that no signal sources reaching the mixing desk and no devices connected to its output have
their earths interconnected; that is, earth should never reach them via two or more different paths, as this could
lead to humming which could even interfere with sound reproduction quality. In order to avoid earth loops, ensure
that the shielding of cables, if connected to the chassis, are never connected with each other.

6.2. Audio connections

As a general rule of thumb, make the signal connections as short as possible and use the best connectors and
cable available. Cables and connectors are frequently held cheap, forgetting that a bad connection can result in a
poor sound quality.

6.3. Background noise

The use of active circuitry can yield, depending on the configuration, to a significant noise level. The NUO2 has
been designed for the minimum possible noise. Anyway, the noise level will always depend on the correct use and
installation of the mixer. It is not the same setting up the FADER at "2" and the MASTER at "10" that the other way
round; FADER at "10" and MASTER at "2". In the first case you get a poor signal to noise ratio that will be fully
amplified by the master while on the second we have a good signal to noise ratio only amplified by "2". As a result,
the background noise is greater in the first case than in the second one.
6.4. Cleaning
The front panel should not be cleaned with dissolvent or abrasive substances because silk-printing could be
damaged. To clean it, use a soft cloth slightly wet with water and neutral liquid soap; dry it with a clean cloth. Be
careful that water never gets into the unit through the holes of the front panel.
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