Phantom 1 108 Db, Toslink dropout

[ragwo]

I've not seen this issue - have you tried increasing the latency to see if this makes it more stable?

To be clear.... there is a optical toslink cable going into both the right and left Phantoms? If not, you will need a splitter that will send the right channel to the right Phantom, and visca versa.

Actually, that's only correct if the speakers are in optical direct mode. Otherwise connecting the optical source to one of the speakers is sufficient. The speakers will figure out the channel distribution themselves.