Samson S4000, Owner'S Manual, Page: 15 / 32

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S4000 • Powered Mixer
Controls and Functions
Mono Input Channel Section
The following section details each part of the twelve mono input channels.
1. SIGNAL LED - MIC/LINE preamp SIGNAL LED which, when illuminated,
indicates that the signal is present at the input.
2. GAIN Control Knob - Variable GAIN control with a range of -6 to -50dB
on the MIC input and +14 to -30dB on the LINE input.
3. LOW CUT Switch - LOW CUT (or high pass) filter rolls off the low fre-
quencies from 75Hz and below at the rate of 18dB per octave.
4. Channel Equalizer - 3-band, swept-mid equalizer allowing you to adjust
the high, mid-range, and low frequencies independently on each chan-
nel. The frequency centers, range of boost or cut, and equalizer type
for each band are described in the following section.
HF (HIGH FREQUENCY) 12kHz +/- 15dB Shelving type - The channel’s
high frequency response is flat when the knob is in the “12:00” posi-
tion. Rotating the knob towards the right will boost the channel'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) CUT & BOOST - The mid cut & boost knob is used
in conjunction with the FREQ knob to create the tonal shape in the
mid-range frequency when using the mono channel’s equalizers. You
can adjust the frequency on the mid-range control with the FREQ
knob, and use the MF knob to either boost or cut that frequency by
plus or minus 15dB. The channel’s mid frequency response is flat
when the MF knob is in the “12:00” position.
FREQ (MID FREQUENCY) Variable 100Hz – 8K - The mid FREQ is a con-
trol enabling you enhanced capabilities in the tonal shaping of the
input channel signal. Thanks to the FREQ control, you have a variable
mid-range equalizer, allowing you to pin point the exact frequency
you want to boost or cut. The FREQ has a “fixed Q” of two octaves
(the amount, or width, of frequencies around the center point that are
effected by the MF control) and can be set in a range from 100Hz to
8Khz.
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 channel's low fre-
quency response at 80 Hertz by 15dB, and rotating it towards the left
will cut the frequency by 15dB.
5. AUX 1 (Pre Fader Send) - Controls the amount of that channel’s signal
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 is usually used to create a separate mix
for a floor monitor system.
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