Okay, several months ago, I found a used Furman AR-117 voltage regulator for sale, and I figured that it was worth the extra bucks to know that I'd always have the line voltage that I need to run my gear. Bear in mind, this isn't just a power conditioner... it's a true voltage regulator. I've been using it for a while, and when my gear is connected to it at home, I get these random VERY loud pops through my cab... kinda like when you pull the jack out of your bass while your amp is on, but again, VERY loud and VERY sharp. These pops are intermittent... anywhere from one every five minutes to one every half hour. I've noticed that when this happens, the voltage LED's that show what the input voltage into the Furman is flicker a bit, like the signal coming from the wall is dropping out and then coming back in. What worries me is that it seems to me like if it is in fact a drop in wall voltage that's causing this pop in my speakers, the Furman should be protecting me from this. I understand that there's a minimum voltage necessary for the Furman to be able to generate the ~120VAC, and if the wall voltage is dropping below that, maybe it would make sense. But none of my other electronic equipment (TV, computer, clocks, etc) ever have any type of problem with power cutting out. Also, I've never noticed this happening when I play in other places (other people's houses, clubs, etc). I'm sure something's wrong with the circuit in our house, but my question is, should the Furman be protecting me from this pop? It's very loud, even when I'm not playing loud, and I'm worried about my speakers. I'm also worried that this might be a sign that the Furman isn't working at all, which of course offers zero protection. Do you guys have any idea what might be going on? Also, does anyone know a good way to get Furman products inspected/diagnosed?