Samson L2400 User Manual

3

INPUT CHANNEL SECTION
The following section details each part of the L2400 

and L3200’s INPUT CHANNELS including the 3-BAND 

EQ, the MONITOR and EFX sends, PAN, GAIN and 

VOLUME controls.
1 – SIGNAL LED 

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

includes a SIGNAL LED which, when illuminated, 

indicates that a signal is present at the input.  
2 - GAIN Control Knob

The L2400 and L3200’s pre-amp stage has a 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

Each of the L Series’ channels include a LOW CUT (or 

high pass) filter which rolls off the low frequencies 

from 75Hz and below at the rate of 18dB per octave.
Auxiliary Buses ( 4 - 8 )

The L Series include several auxiliary signal paths, 

or buses, that can be used to create independent 

mixes for sending to the internal or external effects 

processors, or to an external monitor system. 

These buses start by sending the signal from each 

individual channel, which is set with one of the 

auxiliary control knobs. Then, the mix of all the 

channels auxiliary level is ultimately sent to either 

an internal effects processor, or to an output jack to 

connect to an external effect or monitor system. To 

help you control your effects and monitor mixes, the 

L series has six auxiliary buses, with switching to give 

you a possibility of 8 mixes. 
PRE….? POST….? What’s That?

In order to operate your mixer correctly, it is 

important to understand the concept of PRE and 

POST fader sends.  An auxiliary bus that is set up 

as PRE Fader routes, or sends, the signal to its 

output from a point in the channels’ circuit that is 

electronically before the channel Fader. That means 

the channel Fader has no effect on the PRE aux 

level. A Pre Fader send is what you want to use for 

a monitor mix, so when the level is changed for 

the mix in the main PA speakers using the channel 

Fader, the level in the monitor set by the aux control 

knob remains the same. An auxiliary bus that is set 

up as POST Fader routes, or sends, the signal to its 

output from a point in the channels’ circuit that is 

electronically after the channel Fader.