Bedienungsanleitung Soundcraft M Series (Seite 25 von 48) (Englisch)

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USER GUIDE

USING YOUR SOUNDCRAFT M SERIES CONSOLE

The final sound from your PA system can only ever be as good as the weakest link in the chain, and

especially important is the quality of the source signal because this is the starting point of the chain. Just

as you need to become familiar with the control functions of your mixer, so you must recognise the

importance of correct choice of inputs, microphone placement and input channel settings. However, no

amount of careful setting up can take account of the spontaneity and unpredictability of live performance.

The mixer must be set up to provide `spare’ control range to compensate for changing microphone position

and the absorption effect of a large audience (different acoustic characteristics from sound check to show).

MICROPHONE PLACEMENT

Careful microphone placement and the choice of a suitable type of microphone for the job is one of the

essentials of successful sound reinforcement. The diagrams on the left show the different pick-up patterns

for the most common types of microphone. Cardioid microphones are most sensitive to sound coming from

in front, and hypercardioid microphones offer even greater directivity, with a small amount of pickup behind

the microphone. These types are ideal for recording vocalists or instruments, where rejection of unwanted

sounds and elimination of feedback is important. The aim should be to place the microphone as close as

physically possible to the source, to cut out unwanted surrounding sounds, allow a lower gain setting on the

mixer and avoid feedback. Also a well-chosen and well-placed microphone should not need any appreciable

equalisation.

There are no exact rules - let your ears be the judge. In the end, the position that gives the desired effect

is the correct position!

INITIAL SET UP

Once you have connected up your system (see the sections on connection and wiring earlier in this manual

for guidance) you are ready to set initial positions for the controls on your mixer.

Set up individual input channel as follows:

• Connect your sources (microphone, keyboard etc.) to the required inputs.

• WARNING: Phantom powered mics should be connected before the +48V is

switched on. Ensure the PA system is OFF when switching phantom power on or off.

• Set Master faders at 0, input faders at 0, and set power amplifier levels to about 70%.

• Provide a typical performance level signal and press the PFL button on the first channel, monitoring

the level on the bargraph meters.

• Adjust the input gain until the meter display is in the amber section, with occasional peaks to the first

red LED at a typical maximum source level. This allows sufficient headroom to accommodate peaks

and establishes the maximum level for normal operation (but see note below).

• Repeat this procedure on other channels as required. As more channels are added to the mix, the

meters may move into the red section. Adjust the overall level using the Master Faders if necessary.

• Listen carefully for the characteristic sound of `feedback’. If you cannot achieve satisfactory input

level setting without feedback, check microphone and speaker placement and repeat the exercise. If

feedback persists, it may be necessary to use a Graphic Equaliser to reduce the system response at

particular resonant frequencies.

NOTE:

The initial settings should only be regarded as a starting point for your mix. It is important to remember that

many factors affect the sound during a live performance, for instance the size of the audience!

The front panel drawing on page 8 shows typical initial control positions which is a

useful guide to setting up the mixer for the first time.

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Soundcraft M Series Seite 25

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