Configuration
Page 15Peavey Electronics Corp
The next step is to configure the Automix 4’s rear panel
switches for your application. Although the unit is shipped
from the factory with default switch values, you should make
sure that these settings are correct for YOUR application. Let’s
take a look at each one, and describe their functionality.
First, there are the Channels 1-4 Insert Bypass/Enable switch-
es. These switches determine the routing of the input Channel’s
audio path. In the Bypass position, the signal is not altered and
is sent from the Channel’s output to the master summing bus.
This is normal operation. In the Enable position, the signal
from the Channel is broken. You can tap this signal at the INS
OUT connector for use with external equipment. (This signal
is also available in the Bypass position, acting as a direct line
output.) When the Enable position is used, no audio from the
Channel will be present at the Master Output until a return path is configured. (See the Connections section for
more information.)
Next is the Channel 1 & 2 Phantom Power switch. This switch determines if the Automix 4’s internal 48V DC phan-
tom power is applied to the microphone input terminals on input Channel 1 or 2. If you are using condenser micro-
phones, you must insure that this switch is in the
ON position. Channels 3 & 4 do not have this
switch, and the 48VDC phantom power is always
applied.
The primary output of the Automix 4 appears at the
balanced output labeled OUT+, OUT- and GND
terminals. The MIC/LINE switch adjacent to the
output determines the nominal level of this main
output. In the MIC position, the main output of the
Automix 4 is at mic level, which is suitable for driv-
ing other mic level inputs, such as those found on
mixers. Additionally, using the output at mic level
provides a good signal for driving tape recorders or
video equipment. When the switch is in the LINE
position, the Automix 4 output is at line level, suitable for driving power amplifiers, signal processing equipment, etc.
Also, the line level position is normally used for driving long wire runs for use in press distribution feeds and tie-lines
to other line level audio equipment.
Please take care in the setting of the MIC/LINE switch. Proper operation and maximum audio performance cannot be
obtained if the level of the main output is not optimized for the equipment to which it is connected. For information
on the actual signal levels from this output, please refer to the specifications section in this manual.
NOTE: The Line Out terminals are not affected by the position of the MIC/LINE switch.
Finally, there is the Slave/Master switch. This switch is used in conjunction with the Channel link connector for com-
bining multiple Automix 4 mixers in larger systems. The default position of this switch is Master. In the Slave posi-
tion, the Automix 4 will act as an expansion unit to a Master-enabled Automix 4. All linked units will contain a
mixed output with all inputs on the bus. (See the connections section for more information on combining multiple
Automix 4’s.)
Figure 9. Input Channel Connections and Phantom Power Switch
NOTE: Phantom power is switchable only on Channels 1 & 2.
Figure 10. Master Output and Link Connections and Mode Switches