Samson L2400 User Manual

5

INPUT CHANNEL SECTION - continued
around the center point that are effected by the MID 

CUT & BOOST control) and can be set in a range from 

100Hz to 8Khz. 
LF (LOW FREQUENCY) 80Hz +/- 15dB shelving 

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 

frequency response at 80 Hertz by 15dB, and rotating 

it towards the left will cut the frequency by 15dB. 
9 - Channel Equalizer - Stereo Channels

The L2400 and L3200 Stereo input channels feature 

a 4-band equalizer allowing you to adjust the high, 

mid, and low frequencies independently on each 

channel. The stereo channel equalizer is laid out like 

a mono input on the control panel input strip, but 

internally, the equalizer is affecting a stereo signal 

path. The channel’s frequency response is flat when 

the knobs are in the “12:00” position. Rotating the 

knob towards the right will boost the corresponding 

frequency band by 15dB, and rotating it towards the 

left will cut the frequency by 15dB. The frequency 

centers, range of boost or cut, and equalizer type for 

each band are as follows:
High: 12kHz +/- 15dB shelving type
High Mid: 3kHz +/- 15dB peaking type
Lo Mid: 500 kHz +/- 15dB peaking type
Low: 80Hz +/- 15dB shelving type
10 - PAN Control

The L2400 and L3200’s 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. The L2400 and L3200’s PAN control is a 

Power-Pan circuit, which includes a 3dB dip in the 

center position.  This is desirable since there’s a 3dB 

increase in gain when the mono input signal is heard 

in both the Left and Right MIX bus. 
11 - MUTE switch  

The Mono Input channels feature a large, backlit 

MUTE switch allowing you to easily turn that channel 

on or off. When MUTE switch is illuminated, the 

channel is off. Conversely, when the backlight is off, 

the channel is on. 

The L2400 and L3200’s MIC/LINE pre-amp also 

includes a PEAK LED which when illuminated, 

indicates that the signal is peaking or overloading.  

To reduce distortion, lower the GAIN control to keep 

this LED from staying on. 
13 - 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: (let's say) to see 

if an artist is out of tune, or to cue up a channel 

without having to play it through the main PA 

speakers. 
14 - 1-2 Group Assign switch

The 1-2 Group assign switch is used to assign the 

input channel to the 1-2 Group output bus. 
Note: The Group output follows the channel’s PAN 

control, so if a channel is panned all the way to the 

left it will only feed Group Output 1. Conversely, if a 

channel is panned all the way to the right, it will only 

feed Group Output 2.
15 – 3-4 Group Assign switch

The 3-4 Group assign switch is used to assign the 

input channel to the 3-4 Group output bus. 
Note: The Group output follows the channel’s PAN 

control so if a channel is panned all the way to the 

left, it will only feed Group Output 3. Conversely, if a 

channel is panned all the way to the right, it will only 

feed Group Output 4.
16 –MAIN  Assign switch

The MAIN assign switch is used to assign the input 

channel to the left and right stereo bus outputs. 
17-  VOLUME - Fader Level Control

The VOLUME Fader control adjusts the level of each 

mono input channel.