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Allen&Heath ZED POWER User Manual

Page 28

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Allen & Heath 28

ZED POWER 1000

AMPLIFIER SECTION

Protect and Limit LEDs

The Protect LED will light up when the amps have

been shutdown with the AMPS STANDBY button

or if a fault has occurred with the amplifier.

The limit LED will light when the speaker output

starts to get close to the power rails of the ampli-

fier, typically when distortion gets to 1% or high-

er. The mixer will automatically limit the signal

level sent to the amplifier circuits.

NOTE: If the peak light starts to light brightly/

frequently reduce the Amp Level to avoid audible

distortion on the amplifier outputs or possible

speaker damage.

Amp Level

The amp level pots should be used to set the

relative amplifier output level for each channel.

These levels should be set up during sound

check so that during the performance the master

fader or aux fader can be used to control amplifi-

er level.

Selection switches

These switches are used to select the amplifier

source if no connectors are plugged into the

AMP INPUT TRS jack sockets.

AMP A can be sourced from the post fader main

mix left channel, or when pressed a mono sum of

main mix left & right post fader.

AMP B is from post fader main mix right channel

or post level pot AUX mix.

Bypass EQ

The stereo EQ circuit is in-line with the inputs of

Amps A & B. The circuit can be bypassed for

either side by pressing this button. This is useful

if you would like to use the EQ for feedback sup-

pression on the foldback speakers and not have

these frequencies removed from the main PA for

example.

9 Band graphic EQ

This is a stereo EQ circuit with a 12dB cut/boost

on each channel. See the frequency graph oppo-

site to see the filter response. This can be used

to shape the live sound or for feedback suppres-

sion purposes.