User manual

15
Points to remember
 In all cases, always use high quality twin screened audio cable. Check for instability at the output.
 Always connect both conductors at both ends, and make sure that the shield is connected only at one
end.
 Don’t disconnect the mains earth from each piece of equipment. This is needed to provide both safety
and screen returns to the system star point.
 Equipment which has balanced in- and outputs may need to be electrically isolated from the equipment
rack and/or other equipment, to avoid earth loops.
It is important to remember that all equipment which is connected to the mains, is a potential source of
hum and interference and may radiate both electrostatic and electromagnetic radiation. In addition, the
mains will also act as a carrier for many forms of RF interference generated by electric motors, air-
conditioning units, light dimmers, etc. Unless the earth system is clean, all attempts to improve hum
noise levels will be ineffective. In extreme cases there will be no alternative but to provide a completely
separate and independent ‘technical earth’ to replace the incoming ‘noisy earth’. However, always
consult your local electricity supply authority to ensure that safety regulations are not being infringed.
Connections
The in- and output connections of AUDAC audio equipment are performed corresponding to
international wiring standards for professional audio equipment.
Balanced XLR connectors are wired
as described:
- Pin #1: Shield
- Pin #2: Positive
- Pin #3: Negative
Balanced ¼” TRS (Jack) connectors
are wired as described:
- Tip: Positive
- Ring: Negative
- Sleeve: Shield