Elite Acoustics Engineering StompMIX 4 Quick Manual Handbook page 5

use the corresponding Encoder knob for these Functions.
page
"Channel Util"
Input Phase Polarity is (-) Reversed.
Notch - 76 Hz.
Filter - Notch 56 Hz.
"Channel Util"
Input Phase Polarity is (=) - NOT reversed.
Notch - OFF
Filter - OFF
Filter Freq. - 84 Hz.
"Channel Util"
Input Phase Polarity is (-) Reversed.
Notch - OFF
Filter - HiPass
Filter Freq. - 84 Hz.
system
parameter