Gigging Helix - EQ help needed please! in Helix Posted May 4, 2016 I only use the Helix w/ FRFRs because of some of the acoustic tones I use, so not much experience with what you're doing, but without an amp cab sim the tone is very harsh in my setups. There aren't any rules...how does it sound using a cab model when running into your amp? Do whatever sounds good! I did try some IR's and the sound was too muddy/boomy through the guitar cabs. Cleaner sounds don't seem too bad without a cab sim, it's the higher gain stuff that has something of a "piercing" quality about it.