Bedienungsanleitung Soundcraft M4 (Seite 14 von 48) (Englisch)

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USER GUIDE

WIRING UP

Please refer to pages 35/36 for additional wiring details.

MIC INPUT

The mic input accepts XLR-type connectors and is designed to suit a wide range of BALANCED or

UNBALANCED low-level signals, whether from delicate vocals requiring the best low-noise performance or

close-miked drum kits needing maximum headroom. Professional dynamic, condenser or ribbon mics are

best because these will be LOW IMPEDANCE. While you can use low-cost HIGH IMPEDANCE mics, you do

not get the same degree of immunity to interference on the microphone cable and as a result the level of

background noise may be higher. If you turn the PHANTOM POWER on, the socket provides a suitable pow-

ering voltage for professional condenser mics.

The input level is set using the input GAIN knob.

The LINE input offers the same gain range as the MIC input, but at a higher input impedance, and is 20dB

less sensitive. This is suitable for most line level sources

LINE INPUT

Accepts 3-pole `A’ gauge jacks, or 2-pole mono jacks which will automatically ground the ‘cold’ input. Use

this input for sources other than mics, such as keyboards, drum machines, synths, tape machines or guitars.

The input is BALANCED for low noise and immunity from interference, but you can use UNBALANCED sourc-

es by wiring up the jacks as shown, although you should then keep cable lengths as short as possible to

minimise interference pick-up on the cable. Note that the ring must be grounded if the source is unbal-

anced. Set the input level using the GAIN knob, starting with the knob turned fully anticlockwise. Unplug

any MIC connection when using the LINE input.

INSERT POINT

The unbalanced, pre-EQ insert point is a break in the channel signal path, allowing limiters, compressors,

special EQ or other signal processing units to be added in the signal path. The Insert is a 3-pole ‘A’ gauge

jack socket which is normally bypassed. When a jack is inserted, the signal path is broken, just before the

EQ section.

The signal from the channel appears on the TIP of the plug and is returned on the RING, with the sleeve as

a common ground.

The Send may be tapped off as an alternative pre-fade, pre-EQ direct output if required, using a lead with

tip and ring shorted together so that the signal path is not interrupted.

DO NOT use UNBALANCED sources with the phantom power switched on. The voltage

on pins 2 & 3 of the XLR connector may cause serious damage. BALANCED dynamic

mics may normally be used with phantom power switched on (contact your

microphone manufacturer for guidance)

WARNING ! Start with the input GAIN knob turned fully anticlockwise when plugging

high level sources into the LINE input to avoid overloading the input channel or giving

you a very loud surprise!

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Soundcraft M4 Seite 14

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