[RCGuitar]

Desert twang, lots of good suggestions here. I would go: guitar - input on red eye- out via XLR to mixing board. Gain set on red eye will depend. A good starting point would be 1/2 way to 3/4. Treble on red at at 1/2 and add or subtract from there.

Set channel on board EQ flat at midpoint. Turn up gain on mixing board to where signal is clipping and back it off so that it slightly peaks into clipping.

I use the redeye for every acoustic gig and I always get a great tone with KK and Fisman under saddle pick ups. The 1/4 out on the redeye is good to send a feed to your stage amp for monitoring while you should also send the XLR to the board. Yes the 1/4 feed will not sound as good as the XLR feed IMO but still should sound ok. Good luck with experimenting before thinking about returning.