thomann Fun Generation ColumnMix User Manual page 29

Three-pole 1/8" mini phone jack
(stereo, unbalanced)
XLR plug (balanced)
1 Signal (left)
2 Signal (right)
3 Ground, shielding
1 Ground, shielding
2 Signal (in phase, +)
3 Signal (out of phase, –)
4 Shielding on plug housing (option)
ColumnMix
Plug and connection assignment
29