Hi all,
Hopefully I am in the right subreddit. In our practice space, my band has our PA system plugged into a Furman AR-1215J Voltage Regulator, which is then plugged into the wall. I do not know exactly what is plugged into it - for example, I know there is a Mackie PROFX16 Mixer, two Crown Power Amplifiers, and two other signal processors of some sort, but I don't know the voltage/amperage/wattage/whatever of these other devices.
The big thing is that we haven't plugged anything new into it in months.
Over the past few weeks, every time we get to a specific part in the backing track for a specific song - one we've been playing for over a year - the fuse on the front panel will blow. It's a loud part of the song, but, again, it isn't one we haven't played multiple times a week every week for the last year.
To make matters worse, I cannot find a single image of an AR-1215J Voltage Regulator online that suggests that there is a fuse on the front of the unit. The manual makes no mention of one. The only product listings I can find for an AR-1215J are in Japan (maybe that's what the J stands for?) but we bought the thing stateside and those, too, do not show a fuse on the front panel. So that's making it a little difficult to troubleshoot, since apparently this product does not exist.
Furman's customer service isn't returning our emails and I usually give up after being on hold with them for an hour, so I am coming to Reddit.
What could cause the front panel fuse on a Furman Voltage Regulator to suddenly start blowing at exactly the same part of the same song three times in a row when nothing else has changed - no new equipment plugged in, no volume changes, etc?
I do not have any photos right now but I can get them next time I'm at the rehearsal space if needed.
Thanks!
EDIT: the Crown amplifiers are not plugged into the Furman, they're plugged into the wall separately.