SSL SiX - Routing ideas / Audio Interface

Everytime I turn on the SSL SiX all the meters max out and there’s a really loud muffled popping sound through my monitors. This happens for about a second or so, then everything is fine.

I’ve not really altered anything, and there’s no signal going in at insane levels, and all the pots seem to be in the normal places. I do recall this happening before then it stopped, so not sure!

Just wondering if anyone is getting this or knows what this is?

I’ll try and post a vid later.