Allen & Heath 27 ZED POWER 1000
AMPLIFIER SECTION
Mono out / Sub
Standard 1/4” (6.25mm) jack sockets wired:
Tip=hot, Ring=cold, Sleeve=Chassis. 0dBu.
This is a post fade sum of the MIX left and right outputs. This
can be used to feed an external amplifier or powered speak-
er. Pressing the MONO=SUB switch converts the output to a
low pass filtered output for sub bass. Patching this output
back into the amp inputs allows the internal amplifier on the
ZED POWER 650 to have a sub bass filtered response.
Amp Inputs
Standard 1/4” (6.25mm) Jack socket for balanced or unbal-
anced line level signals. Wired Tip=Hot(+), Ring=cold (-),
Sleeve=Chassis.
The Main Mix Left and Right are connected through the break
contacts of these jack sockets so plugging into these inputs
will override the Main Mix feed to the amp. This means that
you can use an external feed for the on-board amplifiers if
required or the SUB feed can be patched back into either of
these sockets.
Mono = Sub
Press this button to enable the sub bass low pass filter on
the mono output feed. The filter has a cut-off frequency of
100Hz and a 12dB per octave roll-off.
Amps Standby
Pressing this button puts the amplifier in a shutdown state
which mutes the loudspeaker outputs and eliminates any
power loss due to the amplifier circuits. This is a useful fea-
ture for shutting down the amplifier during any breaks or
intervals or if the speakers need to be plugged or unplugged
when the mixer is powered.
The protect LEDS will both light when this button in pressed
to confirm that the amplifier channels have shut down.
Sub Filter
Response
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