Originally Posted by jumblemind
Bigger question is why are you going into a DI from your line out?
Exactly. But I'm guessing the reason is you want to send the preamp drive/EQ of your amp to the PA/mixer, and your amp either doesn't have a DI output, or its DI out is broken. If I'm right on those, then it makes sense to use the line out. And if you are sending a line out, then of course you would connect it to a line in.
But then we come to another question: what DI are you using, that has a line input?
I mean, there are
such things, I use a Focusrite DI/preamp that has line inputs, but really that is pretty uncommon. So the original question is kinda weird.