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L2404-USB
USB MIXER
L2404FX-USB Owner's Manual
Stereo Channels 9-16
These channels are designed to be either stereo inputs or mono inputs depending
on how the inputs are used. For example, if you plug in two ¼” cables into the
left and right ¼” inputs the signals will be stereo. However if you plug in a single
¼” plug into the left ¼” input the channel will sum to mono. These inputs accept
st4dBu or -10dBv line level signals. The channel will also operate in
mono if you plug a microphone into the XLR jack. Unlike channels 1-8 there are
no compressors or inserts on these channels. There is, however, a 75Hz High Pass
Filter (HPF) for low frequency noise on channels 9 – 12 as on the mono channels.
The Gain knobs for the stereo channels 9/10 and 11/12 only influence the MIC
input. The Gain knobs for channels 13/14 and 15/16 only influence the LINE input.
Channel 11/12 can be used as a specific source for the USB audio input. So if you
have a computer that will play music into the mixer you can specifically use this
input by pressing the Source switch. This is handy for intermission music or backing
tracks. You can read more about using the USB connectivity of the L2404FX-USB in
the section labeled Recording and Playing Audio through USB.
Channels 13 – 16 also have an Aux input that can be used for connecting mobile
devices and other stereo sources via a 3.5mm unbalanced stereo cable. To use
the Aux input, press the button beneath the channel labeled Line / Aux. When the
button is off the channel will default to routing the left and right ¼” inputs.
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Stereo Channel EQ Section
Because channels 9 -16 are stereo channels, each EQ knob on the selected
channel controls two EQs. The high and low EQs operate the same as on
Mono Channels 1 – 8. In order to match the performance of each side
of each stereo channel, the Mid EQ has been replaced by a fixed high
mid and a low mid EQ. These are peaking EQs set at 3kHz and 500Hz,
respectively, with +/-15dB of gain.
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Stereo Channel Aux Sends
These aux sends operate like the aux sends on mono channels 1 – 8.
Summary of Contents for L2404FX-USB LvL series
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