I run my Helix direct to the mixing board, and for the longest time ran an external reverb pedal in one of the send/return fx loops on the Helix. One day I decided to run the reverb pedal after the Helix (1/4" mono out) instead of through the fx loop, and got, what I felt like, was a more pristine/clear sound out of my reverb unit. Now, I don't know if this was due to the fact that I do run the Global EQ with a significant high cut, or because there's a definite affect in tone through the send/returns the Helix provides. I know Line 6 states the guitar input on the unit is the highest quality found on the market, but I'm not sure what's going on with the rest of the input/output jacks.
I'm asking because I have a few other high-quality effects that I've incorporated with my Helix setup, but I'm a bit reluctant to use them in the Helix fx loops, but I'm seriously missing the ability to turn them off/on via the Snapshots/block assign.
Can anyone share their experience using external effects through the send/returns of the Helix?