there's a weird initial clamping of the volume when the setting is on Stereo. It does NOT show up in the other two settings - when on Mono, it sounds great. When in Stereo Wide it sounds great. BUT - when in Stereo, I play a staccato chunk 16th note pattern, and the first note comes through loud and clear, while subsequent notes become audibly squashed - almost like a limiter has kicked in. It's extremely noticeable, and unusable. It's not even tamed by adjusting the level knob on the XLR Ins on the FH1500. VERY weird, and it makes the only two good choices either Mono or Stereo Wide. The XLR Out level on the Helix is set to Line (I hadn't adjusted that to try to temper the clamping). The overall level difference on the FH1500 (when used strictly as an FRFR via the XLR Ins) using the Stereo setting is definitely lower than the Mono setting, and lower than the Stereo Wide setting. That weird clamping (maybe 500mS into the sound) on the attack of the signal while in Stereo mode is incredibly distracting.
I have just purchased Helix, Firehawk 1500 and JTV variax. I have the same issue of compression or limiting on the monitor inputs. This reduces the overall volume on stage to the extent where I am running at full volume with the apm leaning on its backstand and approx 2m away from me. Surely Line 6 should know the best way to connect the Helix and Firehawk to use all speakers as a pure WDW system. I am quite new to the digital side and fancy setups so maybe I am missing something.
Cheers
Paul