Samson S4000, Owner'S Manual, Page: 17 / 32

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S4000 • Powered Mixer
Stereo Input Channel Section
The S4000 feature stereo input channels for connected stereo line
level devices like keyboards and drum machines, as well as the outputs
from effects processors and digital guitar modelers.
15. SIGNAL LED - The SIGNAL LED which, when illuminated, indicates
that a signal is present at the input.
16. GAIN Control - The preamp stage has a variable GAIN control with
a range of -20 to +20dB on the stereo LINE input.
17. Channel Equalizer - 3-band equalizer allows you to adjust the high,
mid-range, and low frequencies independently on each channel.
HF (HIGH FREQUENCY) 12kHz +/- 15dB Shelving type - The channel’s
high frequency response is flat when the knob is in the “12:00”
position. Rotating the knob towards the right will boost the chan-
nel's high frequency response at 12 kHz by 15dB, and rotating it
towards the left will cut the high frequency by 15dB.
MF (MID FREQUENCY) 2.5kHz +/- 15dB peaking type - The MF knob
is used to create the tonal shape in the mid-range frequency when
using the stereo channel’s equalizers. You can use the MF knob to
either boost or cut 2.5kHz frequency by plus or minus 15dB. The
channel’s mid frequency response is flat when the MF knob is in
the “12:00” position.
LF (LOW FREQUENCY) 80Hz +/- 15dB shelving type - The channel’s
low frequency response is flat when the knob is in the “12:00”
position. Rotating the knob towards the right will boost the chan-
nel's low frequency response at 80 Hertz by 15dB, and rotating it
towards the left will cut the frequency by 15dB.
18. AUX 1 (Pre Fader Send) - Controls the amount of that channel’s sig-
nal that is sent to the AUX 1 Output. The signal feeding Aux 1 is
sent before, or pre, the channel Fader, so the channel Fader has
no effect on the Aux 1 level. The Aux 1 bus is usually used to cre-
ate a separate mix for a floor monitor system.
19. 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 config-
ured 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 mon-
itor system, but you can set the Pre/Post switch on the S4000 to
Post to use the send as en effects bus to an external processor.
20. 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 setting when using Aux 2 as a monitor send.
Controls and Functions
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