jamhr001

I am getting the same message when importing presets. It only happens on presets using the 5150 amp, and it doesn't matter whether they are imported separately or together, zipped or not. It seems to affect the Helix regardless of firmware level. I now have 2.01 (the one after the snapshot update). I have also updated the Helix editor. Other presets do not have the issue. Line 6 is unable to provide any insight into the URI message, saying it's sort of generic and doesn't really mean much. Google comes up with only two Line 6 forum posts, so I don't know how "generic" could be.

Thanks for your reply! That's true. Is it really very likely? The shell protects the pins from casual contact with any conductor, and most people disconnecting a live line would take some care with it, whether or not they were aware of the phantom voltage. I've also read that phantom power circuits have built in protection if they are reasonably well designed. Someone mentioned on the other thread that some of the top boards in the world have phantom on permanently - you can't shut it off. While you can't draw any absolute conclusions from that, it's reasonable enough to assume they're not going to power those boards down every time they plug in a microphone.

There is no obvious reason why we should not be able to "hot plug" a microphone while the 48v is on unless there is a short in the mic or cable, or, if there is an issue with the preamp itself. Even if powering down is a "best practice," and I'm not convinced it is, the likelihood that best practices won't always be followed in live situations is a virtual certainty, and for that reason professional equipment (or even consumer equipment, for that matter) should have built-in protections. Simply hot-plugging a working condenser mic should never be considered "risky." -- Found this paragraph on a Gearslutz thread: "Phantom power has the advantage that a dynamic or ribbon mic may be plugged in to a phantom powered microphone input and operate without damage, and a phantom powered mic can be plugged in to the same input and receive power. The only hazard is that in case of a shorted microphone cable, or certain old microphones having a grounded center tap output, current can flow through the microphone, damaging it. It's a good idea anyway to check cables regularly to see that there are no shorts between any of the pins, and the few ribbon or dynamic microphones with any circuit connection to ground can be identified and not used with phantom power." This article is from the Audio Professional FAQ

I just opened a ticket for the same issue. No Mic Input. It worked like a charm yesterday, which was the first time I'd used the mic input, after a few weeks of playing around with the guitar features. The combination of mic and vocal sounded amazingly good. Today only the guitar input is working. All the usual suspects have been checked - although nothing changed between yesterday (mic input working) and today (mic input dead). 48v is on. Dynamic mic has same issue. Several known good cables tried. New patch, both signal paths tried. I hear a normal popping sound when the condenser mic is plugged in. Nothing else. Very hopeful that your experiences have alerted Line 6 to a wider issue and they will be able to expedite warranty repair of this very expensive "pedal."