User Guide

5
580
9. LOW CUT Button
Engages the low cut circuit and enables the variable LOW CUT control.
10. LOW CUT Control
When the LOW CUT button is engaged, this control sets the frequency below which frequencies will be attenuated using
a 12 dB/octave Bessel filter.
11. POLARITY INVERT Button & LED
Engaging this button will invert the polarity of the microphone input signal. This button does not affect the
INSTRUMENT input. Engage this button to match polarity when multi-miking an instrument, such as drums, or when
using a top/bottom mic pair on a snare drum or front/back mic configuration on a guitar cabinet. The polarity is inverted
when the LED is lit.
12. +48V Button
Enables phantom power for use with condenser microphones. It’s recommended that the condenser microphone be
connected before engaging the +48V button. If connecting a ribbon or dynamic microphone to the 580, make sure the
+48V button is disengaged and wait about 15 seconds for the capacitor to discharge before making the connection.
13. MIC/INSTR Button
When this button is in the out position, the chassis’ rear-panel MIC input is enabled. When this button is in the in
position, the front-panel INSTRUMENT input is enabled.