Function Switches (backlit push buttons)
Polarity
The Polarity switch is the top switch in the column of four round push buttons located on the lower
right side of the channel block.
The polarity switch will light up when enabled and is labeled with the
symbol: “
∅
”. When off, pin 2 of the LINE OUTPUT is hot (positive). When the switch is enabled, pin 3 is
hot (positive). Normally the switch should be off and only enabled when it is desirable to reverse the
polarity of the Line Output signal.
Low Cut
The Low Cut switch is the second switch down in the column of four round push buttons located on the
lower right side of the channel block.
The switch will light up when enabled and is labeled with the
symbol: “
”
When enabled the input signal will pass through a 100Hz 6dB per octave filter.
Mic Pad
The PAD switch is the third switch down in the column of four round push buttons located on the lower
right side of the channel block.
The switch will light up when enabled and will attenuate the Mic input
level by 15dB. When undesired distortion is present at low gain levels it is recommended to engage the
Pad switch then turn up the Gain and level controls as needed. The Mic Pad has no effect on
Instrument and Line In signals
+48 V (Phantom Power)
The +48 V switch is the bottom switch in the column of four round push buttons located on the lower
right side of the channel block. The switch will light up when enabled and 48 volts will be supplied to
the Mic input jack. Most modern condenser mics require phantom voltage to operate and we
recommend checking the requirements of your microphones before connecting them. It is good practice
to keep phantom power off when it is not required. To prevent loud transients, make sure the phantom
power is off when connecting or disconnecting microphones.
Output Meter
The Output Meter is a three color LED bar graph located at the top right corner of the channel block
.
Input Meter
The Input Meter is a single round tri-color LED located below the Output Meter on the right side of the
channel block. When nominal signal levels are present the LED will be green. The color will change to
yellow and then red, as higher levels are present in the input stage (see specs on page 2). The Input
Meter may be a helpful indicator when adjusting the Gain control, using the PAD function and when
using the SHAPE control toggle switch.
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