17
AUTOMIX
™
CONTROL 8
Setting up the Automix Control 8
1. Wiring Inputs and Outputs:
For best results, it is recommended that two-conductor shielded cable is used for all input and output connections.
When making connections remember to observe proper polarity. The recommended strip length for the detachable
screw terminals is 1/2".
2. Initial Control Settings:
Channel Levels
(Faceplate)
—
Full CCW
Channel Gain Trims
(Internal)
—
Full CCW
Aux Send Controls
(Internal)
—
Full CCW
Priority
(Internal)
—
Full CCW
Notch Controls
(Internal)
—
Full CCW
Downward Expander
(Internal)
—
Full CCW
Aux Master Level
(Internal)
—
Full CCW
Master Level
(Faceplate)
—
Full CW
Master Gain Trim
(Internal)
—
Full CCW
All channels in the “auto” mode
3. Setting the Channel Level:
Set the front panel control (of the channel that is being adjusted) to the middle (12 o’clock) position. Connect a mic
or line input to the first channel. While someone is speaking into the mic (in a way that it would normally be used),
slowly increase the channel gain trim until a slight ringing (feedback) is heard or until the clip led begins to blink red
occasionally. Turn the channel gain trim down slowly until the ringing is no longer audible. This is the maximum level
that the gain trim should be set. Turn the external channel level control down (full CCW).
NOTE:
The internal master gain trim (#10) may need to be turned up (CW) if the channels can be easily driven into
clipping, or feedback cannot be obtained in the normal operating range of the internal gain trim control.
Repeat this step for the remaining channels.
Return all of the external channel levels controls to their mid position (12 o’clock).
4. Setting the Notch Filter:
The notch filter can be set in a couple of ways. It can be set using test equipment to pinpoint frequencies that are
prone to feedback, or it can be set “by ear.” For the purpose of this manual, the “by ear” method will be described:
A.
Slowly increase the master gain trim (internal) until a slight ringing is audible.
B.
Select the proper frequency range and turn the corresponding level control CW to about the 12 o’clock position.
C.
Slowly turn the frequency control back and forth until the ringing is no longer audible.
D.
Again, slowly increase the master gain trim until ringing is heard. If this is a different frequency, repeat steps B
and C. If it is not a different frequency, try turning the frequency control while listening to the feedback. Stop when
the feedback is as low as possible. If the feedback is still audible, turn the corresponding level control CW toward
the -15 setting until the feedback is gone.
5. Setting the Overall Level:
Set the master level control (external) for the desired overall output level. This mixer’s levels are now set and the
mixer’s other features (downward expander, low cut and priorities) can be set as desired for the application.
6. Attaching the Security Panel:
Attach the security plexiglass with the eight supplied screws. This will prevent any unwanted tampering with the
settings.