DAPAudio D2250, Manual

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Audio Wiring
Noise immunity is improved significantly by the use of low impedance sources, such as good quality professional
microphones or the outputs from most modern audio equipment . Audio cheaper high impedance microphones, which
may suffer from interference over long cables runs, even with well-made cables.
Having provided all equipment with power and earthing connections consideration must be given to the method of
providing audio interconnection and adequate screening of those interconnections. This must be done in a logical
sequence to avoid problems and assist in the localization of problem equipment.
- Connect the control room monitor system to the console outputs and check for any hum, buzzr RFI. Only when you
are satisfied with quietness of the console and the monitor system should you proceed with the next step.
- Connect the multi track tape recorder, via the noise reduction system, if in use , and again check that the system is
clean.
- Connect stereo tape records , studio monitors aux sends one at a time , checking and isolating any connection which
degrades performance.
- Connect all other peripheral devices.
- Connect all microphone lines.
By following this sequence much time and future trouble will be saved, and the result will be a quiet, stable system.
Shielding
Audio equipment is supplied with a variety of input and output configuration, which must be taken into consideration
when deciding where the screen connections should be made. there are three sources of unwanted signal being
impressed on the screen, which are as follows;
- Extraneous electrostatic or electromagnetic fields.
- Noise and interference on the earth line.
- Capacitive coupling between the screen and signal wires.
8 BUS MIXING CONSOLE
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