I configured my Axe-Fx III to send AES to my two Powercab Plus 112's. Axe-Fx III AES Output > Powercab Plus AES input > PC Plus AES Output > 2nd PC Plus AES input. I get static, dropouts, loud cracks and pops, and sometimes it sounds like it switched to flat mode despite the display showing Speaker mode.
I am using 110 ohm AES cables for the connections, and they work perfectly with my Helix and L6Link to the Powercabs.
Any help would be appreciated.