Ok, thanks! I really appreciate it!
I've tried my connection with Left and Right outs and I still get the crackling on one L3t; I have the latest firmware on all hardware. I guess my action plan will be to fund AES/EBU cables, WIFI, and an Ipad. I will see where that lands me with this issue.
So the L6 Link 'system' can be pretty pricey as a complete system. Meaning if your stage is pretty wide you'd most certainly need one or two 50ft AES/EBU cables, plus AES/EBU cables to connect the L3t's to the L3s's (heck, might as will use these as interconnects as well instead of quality XLR's). Plus the WiFi plus the Ipad. Wow, didn't know all that before purchasing, I guess I thought you could get the M20d out in front of the FOH speakers...I guess you still can, but why.
Where do you recommend purchasing AES/EBU cables, stateside that is?