Samson S4000 Owner's Manual page 16

Controls and Functions
6. AUX 2 (PRE/POST) - Controls the amount of that channel's signal that is sent to the AUX 2
Output. The signal that feeds Aux 2 is sent before, or pre, the channel Fader, so the channel
Fader has no effect on the Aux 2 level. On the S4000, Aux 2 can be configured for pre or post
fader send using the PRE/POST switch. The Aux 2 bus is usually used to create a separate mix
for a floor monitor system, but you can set the Pre/Post switch on the S4000 to Post to use the
send as an effects bus to an external processor.
7. POST (Pre/Post) Switch - The POST switch is used to select the point that the Aux 2 bus uses to
send the signal. When the POST switch is in the up (PRE) position, the signal feeding Aux 2 is
sent before the fader, so the channel Fader has no effect on that level. This is the normal set-
ting when using Aux 2 as a monitor send. When the POST switch is in the down (POST) posi-
tion, the signal feeding Aux 2 is sent after the fader, so the channel Fader has an effect on that
level, meaning the Aux level tracks up and down with the channel Fader. This is the normal
setting for using Aux 2 as an effects send, since when you set the channel louder you normally
want the effect to get louder.
8. AUX 3/EFX1 (Post Fader Effects Send) - The S4000 provides high quality, 24 Bit digital effects,
and the level of effects can be set independently on each channel. The channel's EFX knob
controls the amount of signal that is sent to the EFX bus. The signal of the EFX bus is routed
to the DSP EFX section for on-board signal processing. The EFX1 signal can also be sent to an
external effect device connected to the EFX 1 SEND jack located on the front panel jack field.
9. AUX 4/EFX 2 (Post Fader Effects Send) - The channel's EFX (Effects) knob controls the amount of
signal that is sent to the EFX bus. The signal of the EFX bus is routed to the DSP EFX section
for on-board signal processing. The EFX2 signal can also be sent to an external effect device
connected to the EFX 2 SEND jack located on the front panel jack field.
NOTE: The signal feeding EFX1 and EFX2 is sent after the channel Fader, so the channel Fader
has an effect on that level, meaning the Aux level tracks up and down with the channel Fader
10. PAN Control - The PAN control is used to place or position the mono signal into the stereo main
Left and Right MIX bus. You can create a stereo image by panning some input signals to the
left and others to the right.
11. MUTE switch - The mono Input channels feature a large, backlit MUTE switch allowing you to
easily turn the channel's audio on or off. When MUTE switch is illuminated, the channel is off,
conversely, when the back-light is off, the channel is on.
12. PFL (Pre Fader Listen) switch - The Mono Input channel's PFL, or Pre Fader Listen switch allows
you to listen, or "solo" a channel or group of channels in the headphones. When the PFL switch
is pressed down, the channel is assigned to the solo bus and can be heard in headphones
plugged in to the PHONES connector located in the front panel jack field. Since the signal is
sent pre fader, you can hear the signal regardless of the position of the channel volume Fader.
This allows you to listen to a channel by itself without having to play it through the main PA
speakers.
13. PEAK LED - The S4000's MIC/LINE preamp includes a PEAK LED which when illuminated, indi-
cates that the signal is peaking or overloading. To reduce distortion, lower the GAIN control to
keep this LED from staying on.
14. VOLUME Fader - The VOLUME Fader control adjusts the level of each mono input channel.
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