If you want a truly professional sound then using a
snake/multicore with your mixer placed at the back of the hall can be the
way to go - as long as you have someone who knows your music and has a good
pair of ears!
The only downsides are that it takes additional
time to set up and it may not be possible in some venues without running the snake on top of doors,
due to the placement of emergency exits.
Types of Snakes
Snakes are basically a number of individual cables
wrapped together within a protective metal mesh which is then covered in a
rubberised outer sheath. They tend to come in standard configurations:
15m, 30m and 45m lengths
12, 16, 20, 24 cables
Typically the stage end is terminated in a block
with 4 XLR female connectors (bringing back signals from the mixer) and the
rest are XLR female connectors (taking mike and instruments).
The mixer end reverses the connectors but they
terminate with loose cable and XLRs.
Then each cable is wired for balanced use. However
you can put un-balanced line signals down them and you can use one cable for
the stereo output of a keyboard. In this case you would need a stereo jack
socket to XLR cable.
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