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OK been into troubleshooting central this last couple of days Troubleshooting steps Disconnected the 4cm from helix Helix now being run in standalone mode from XLR into a set of studio monitors and nothing else Valve amp assembled back into a traditional set up with cab and pedals Results Helix still sounded poor and required compensation in settings - ie , im a big fan of the Friedman model, i was having to tank the settings to get anything decent out of it, in terms of both gain and volume. All models seemed to sound the same regardless of model chosen / setting. All seemed to just flub into one another. Valve amp is still intermittently noisy connected direct to a traditional speaker cab Conclusion I have multiple issues in the rig - both with helix and my valve head I now hate technology Action taken Re-firmware'd the helix to 3.01 and the associated foot controller (using helix rack) Helix now connected exclusively to studio monitors Valve amp and associated cabling removed from the rig Valve amp tested in isolation of the helix - nothing connected to it other than guitar > amp > cab. Still bloody noisy --- and more frequently noisy, intermittence is disappearing Helix is off during these tests Results/conclusion Helix is now sounding sweet, back to the tones and aural pleasure i got use to, like a blanket has been lifted. Keeping track of time is a great thing, realised 4years passed since my amp was purchased - although does 2020 count as a year, could we agree on 3 ? Either way - valve head now removed until further notice and when I can locate and employ a working amp tech in the current UK lockdown situation. The good thing - i aint gigging atm. Either way - I'm now back to happy and liking helix again, were in love once again for now, thanks to all that assisted , stay safe....... Cheers

Thanks Waymda If it turns out to be hardware im a bit concerned that a 2yo "tour grade" helix thats never left the house could have an issue... testing all equipment outside of helix is fine , its just the helix thats seems a bit of a diva Im the meantime ill reinstall the firmware and report back on thread with my findings. cheers

Running Helix rack - home use only. I have updated to Helix Firmware 3.0 , then up to the recommended 3.01 , I'm also running HXEdit 3.01 Since the update I'm finding the helix to be rather Temperamental I run a simple set up with 2 main use cases Standalone mode with about 5 basic ish patches to cover off most of the styles i play . 4CM - linked to my valve head. I have a dedicated Patch for this via Send/Return 1 - which is also hooked up to an ebtech Hum Eliminator to eliminate ground loop. To describe Temperamental issues Using 4CM yesterday, getting terrible hiss and hum (needed an aggressive noise gate to silence but was crippling the tone) Switch unit off , leave for a while (prob 3 hrs) - switch back on - no hiss - (other than the expected hiss of an amp) nothing changed in terms of settings / cabling Use the device for a while, switch to standalone mode which sounds fine Return to the 4CM patch - the dreaded hum / buzz / noise is back Switch off and return today - back to normal In standalone mode - noticing intermittent issues Seeing drops in volume between amp models - noticing I'm having to turn up more and more for general use The quality of the models seem to be different in quality depending on the day of the week All in all a little frustrating, and I'm finding myself tweaking more than playing Wondering if anyone else is seeing similar problems ? Outside of a factory reset - unsure what else i can do - have disconnected the amp from 4cm - but issues prevail for standalone mode. Thanks in advance.