Hello guys, I just got an alesis quadraverb q2, and I've been having problems getting it set up.
I'm trying to run it through my effects loop of my 5150 II, and it works, but the volume gets cut in half.

I am not quite sure why its happening. Should it be ran in stereo? Am I plugging it in wrong?

Any tips? And suggestions? I badly need it.
Thanks guys, I appreciate all the help.