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5
INTERNAL PANEL FEATURES
PRIORITY (Channels 1 and 2 only) (4)
Turning the “priority” control clockwise allows one channel to override the others. It does this by tricking the
gain computing circuits into thinking this channel is louder than the others. Up to 9 dB of priority is available.
GAIN TRIM (5)
This control sets the input gain in each preamp. The amount of gain is adjustable from +25 dB to +55 dB
(Mic Input).
DIP SWITCHES
Each channel has a four station DIP switch that controls the following functions in each channel.
MAN/AUTO (6)
This switch determines whether the channel is operating in the automatic or manual mode.
OFF/MBUS (7)
This switch is used to connect the channel to the system mutebus. This allows multiple inputs to be muted
under external control. NOTE: See MUTEBUS (21).
LO CUT/FLAT (8)
This switch selects the low cut filter. The low cut filter provides a low frequency roll-off that will help minimize
unwanted noise (handling of mics, bumping of tables, etc.). The roll off starts at 75 Hz (-3 dB) and is a 6 dB
per octave filter.
OFF/PHAN (9)
When this switch is in the PHAN position, +12 volts of phantom power are supplied to the Mic ± terminals.
This provides power for condenser mics and should be defeated when using dynamic microphones or
unbalanced inputs.
ACTIVE/CLIPPING LED (10)
The LED will glow green when the channel is active and the status output is low (0 V). The LED will start to
glow red 6 dB before the preamp begins to clip.
NOTCH FILTER LEVEL AND FREQUENCY CONTROLS (11 and 12)
The Automix notch filter consists of three sweepable 1/3 octave filters with 0 to 15 dB of cut. These filters
can be used to attenuate frequencies that are prone to feedback without adversely affecting the tonal quality
of the system. Equalizing these problem frequencies out of the room's frequency response increases the
sound system gain before feedback.
Notch Filter Level Control (11): The notch filter level control adjusts the amount of cut at the frequency
selected by the corresponding frequency control (12). It is adjustable from 0 dB to 15 dB of cut.
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Internal Front Panel: