Allen & Heath AP5195 用户手册

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页码 36
16 
PA User Guide 
 
AUX SENDS
      The  PA Series has four auxiliary sends.  
These provide independent mixes from the channels.  They 
have many applications, the most common being foldback 
monitor and effects sends.  They can also be used for 
additional special feeds such as recording or clean feed. 
FB1
      Pre-fade  aux  send  feeding the FB1 foldback monitor 
output.  Turn up the control to send the channel signal to the 
mix, from fully off to a maximum +6dB boost.  The unity 0dB 
position is indicated.  The send is pre-fader but post-EQ and 
post-mute.    This  means  that  its  level  is  not  affected  by  the 
channel fader but it is affected by any changes made to the 
EQ.  Pressing MUTE also turns off the FB1 send. 
FB2
      Pre-fade  aux  send  feeding the FB2 foldback monitor 
output.  Similar to FB1 described above. 
AUX
   Post-fade aux send feeding the AUX output socket.  
The AUX send is affected by the channel fader.  The AUX mix 
can be used for a variety of applications such as additional 
effects send, independent speaker zone or recording feed. 
FX
   Post-fade aux send to the internal effects unit and also the 
FX output socket.  Turn up the control to feed a portion of the 
channel signal to the effects unit where it is processed to create 
effects such as reverb and delay.  The FX sends let you adjust 
how much effect you add to each signal in the mix. 
  
Aux sends  are referred to as ‘pre-fade’ or ‘post-fade’.  
This is because the signal that is routed to the send control is 
sourced before (pre) or after (post) the channel fader.  This is 
illustrated in the BLOCK DIAGRAM in the Specification section 
later in this user guide. 
   
Effects sends  are used to add effects such as 
electronically simulated reverb or echo to the mix.  Turning up 
the FX control sends a portion of the channel signal to the 
internal effects unit where it is processed before being returned 
to the main mix through the FX channel.  The processed ‘wet’ 
signal adds to the direct ‘dry’ signal in the same way as the 
listener would hear a direct sound followed by natural room 
reverberation.    The  FX  send  is  post-fader  to  ensure  that  the 
balance between direct and effect signal is always the same 
regardless of fader position. 
  Using more than one effects unit   Use the AUX send to 
feed another effects processor in addition to the internal effects 
unit.  You can also use the FX output with an external unit 
instead of or mixing with the internal unit. 
   
Foldback sends  are used to provide individual or 
groups of performers or backstage crew with their own monitor 
mix, for example wedge speakers facing musicians on stage, 
in-ear monitors, hotspot speakers, dressing room and lighting 
position feeds.  The mix is created by turning up the channel 
FB sends according to the needs of the performers.  It is not 
affected by the faders which control what the audience hears. 
    Setting up a foldback monitor mix   Start with all the 
channel sends turned fully down.  Gradually turn up the sends 
to add those sounds requested by the performers, typically the 
vocals and a few lead instruments.  Normal control position is 
around 9 to 3’o’clock according to strength in the mix.  Be 
careful to avoid feedback between closely positioned mics and 
speakers.  Only add those sounds which are needed or 
requested.  Keep the mix as simple as possible and try to avoid 
adding effects such as reverb which can muddy the sound on 
stage and reduce the gain before feedback. 
O
FB2
O
FB1
+6
O
O
AUX
O
O
+6
+6
=
O
PAN
O
+6
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PK !