I've been using the HX Effects for a few days now, and while all the effects sounds great, the HISS coming through my amp, even with guitar turned off, or not plugged in make mean this has to be returned. No way I can gig with this much hiss coming through a PA.
The HISS goes away when I do a hard bypass. Perfectly clean, of course. Turn it back on and the hiss is immediate. Doesn't matter what I do: turn down guitar, unplug guitar, bypass all effects, disconnect all cables except the one going to the amp, turned off all the lights in the house, etc. I've updated to latest firmware. etc. About the only thing I haven't done it take do a different location. It is NOT 60hz hum, or EMF. It is white noise hiss.
This is at medium loud house volumes, and only gets louder as I turn the amp up. (Vox AC15.) Without the HX, the amp is dead quiet.
Any help? Without a cure, I probably have to return this.