MONO INPUT MODULES:
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The 3-pin XLR, "MIC" (rophone) connector is provided for use with professional microphones.
The
TRS (Tip-Ring-Sleeve) or 1/4 inch, "LINE IN" connector is provided for
use with line-level sources, like CD players, or FX units.
Only one connector can be used at a time on each input channel.
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LOW CUT
(High Pass Filter):
- cut 18dB/octave from 75Hz
- can be used to cut traffic or air conditioning rumble
- don't use on bass
guitars or tubas.
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The "GAIN" control
allows you to adjust the input strip so that you can operate with the channel "LEVEL" control in its normal
range, around "-0-" on the scale. This assures that the signal will
have the maximum headroom and minimum noise.
Headroom
is
the
level
difference
available
between normal level and the point of distortion.
Noise is the
background hiss you hear when you turn the
gain or volume up too much.
At the "-0-" position, there
is still 15 dB of gain available, should the input signal drop in
level. We say that there is 15 dB of gain-in-hand.
This gives you room
to maneuver should the input signal change.
Working with the channel "LEVEL" control at "-0-" also allows for smooth fades
in or out.
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EQUALISER (EQ):
The equaliser (EQ) on a mixer is the sound equivalent of a colour gel in lighting.
Just as you can make a lighting effect "warmer" or "colder" by inserting
one or more gels in front of the light source; an EQ inserted in the
signal path can be used to make a sound effect "warmer", "colder" or
more or less "present".
The EQ on the Behringer MX802 is rather rudimentary, but functional.
It consists of one control, "HIGH", to boost or cut the high
frequencies ("sizzle"), and another, "LOW" to boost or cut the low
frequencies ("boominess". A third control, "MID", can boost
or cut the mid frequencies ("presence").
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HIGH:
(Shelving)
- boost or cut 15dB @ 12kHz
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MID:
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LOW: (Shelving)
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Some of
the signal from each input channel can be sent to a stage monitor, so the performers can hear themselves. The "AUX 1" control adjusts how much of each channel is
sent to the AUX2 SEND output, PRE FADER -- before passing through the input channel "LEVEL" control. The level sent to AUX1 is unaffected by the house mix.
Some of
the signal from each input channel can be sent to an external effects
processor to add an effect -- artificial reverberation, for
instance. The "AUX 2" control adjusts how much of each channel is
sent to the AUX2 SEND output, POST FADER -- after passing through the input channel "LEVEL" control. The level sent to AUX2 follows the house mix.
The "PAN" control allows us to place individual sounds so that the are
heard to come from somewhere between the two MAIN MIX outputs.
If
the "CLIP" LED
flashes briefly every couple of minutes, the signal level is not too
high. But if it flashes continually, you will have to reduce the input signal to avoid distortion.
- adjust the "GAIN"
control down (counter-clockwise)
- insert an
external attenuator (pad) at the input connector
- move the microphone farther from the source.
The
MONO input channel "LEVEL" control is your operational
control over the signal level during a recording or performance. It
allows you to smoothly fade an individual sound in or out.
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STEREO INPUT MODULES:
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A pair of TRS (Tip-Ring-Sleeve) or 1/4 inch, "LINE IN" connectors is provided for
use with line-level sources, like CD players, or FX units.
Often, such devices are stereo so Left and Right signal sockets are provided.
A mono source connected to the Left socket will feed both left and right channels equally.
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The "EQ" and "AUX" sections of the STEREO input channel module are identical to the MONO input channel module.
The "BAL(ance)" control allows us to place individual sounds so that the are
heard to come from somewhere between the two MAIN MIX outputs.
The STEREO input channel "LEVEL" control is your operational
control over the signal level during a recording or performance. It
allows you to smoothly fade an individual sound in or out.
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MAIN MIX MODULE:
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Stage monitors can be connected to the PRE-FADER AUX SEND 1 socket.
An external effects processor can be connected to the POST-FADER AUX SEND 2 socket.
The output of fx processors must be brought back (returned) to the mixer in order to be heard, The STEREO AUX RETURN sockets are used for this function.
The AUX RETURN sockets are wired so that if you only connect to one pair of sockets, both AUX RETURN 1 and 2 are sent the same signal.
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The "AUX RETURN 1" control adjusts the volume of the effects return signal connected to the AUX RETURN 1 sockets. AUX RETURN 1 can only be sent to the MAIN MIX OUT to feed the house speakers.
The "AUX RETURN 2" control adjusts the volume of the effects return signal connected to the AUX RETURN 2 sockets. The "FX TO AUX
1" switch selects whether the AUX RETURN 2 signal is sent to the MAIN MIX OUT (to feed the house speakers.) or
to AUX 1 (to feed the stage monitors).
The "POWER" led indicates that AC power is available.
The "48V" LED indicates that phantom power is being applied to all 4 MONO Inputs..
The "L and R" LED meters indicate the signal level being sent to the MAIN MIX output. To avoid distortion, ride the gain so as to no hit the red "CLIP" LED.
The "2-TK TO CTRL ROOM" switch sends the 2-TRACK IN (MP3 player) signal to the booth monitors (instead of the MAIN MIX signal). This would be used to check the 2-TRACK IN in the booth, without the audience hearing it.
The "2-TK TO MIX" switch sends the 2-TRACK IN (MP3 player) signal to the MAIN MIX output (instead of the MAIN MIX signal). The would be used to send the 2-TRACK IN signal to the house speakers for the audience to hear.
The "MAIN MIX" fader controls the volume sent to the MAIN MIX output. In theatre use, this would most often be a pair of powered speakers in the house.
The "PHONES/CONTROL ROOM" control adjusts the volume heard on headphones connected to the PHONES socket, or a pair of speakers in the booth connected to the CTRL ROOM OUT sockets.
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The 2-TRACK RCA sockets are intended for connection of an external cassette or MP3 recorder/player.
External equipment such as a stereo power amp or powered speakers can be connected to a pair of TRS (Tip-Ring-Sleeve) sockets labelled MAIN OUT.
A pair of headphones can be connected to the PHONES socket.
A pair of control room (sound booth) speakers can be connected to the CTRL ROOM OUT sockets.
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REAR PANEL: |
On the rear of the mixer is the connector for the external power supply.
The POWER SWITCH turns the mixer on.
Some
condenser or electret type microphones can be powered externally,
eliminating the need for batteries. The power required can be supplied
by the mixer via the same cable used to carry the microphone signal to
the mixer.
This system is called phantom powering. The "PHANTOM" switch
activates this function for the 4 MONO inputs.
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