We have two Bogen C100 paging amplifiers in our wire closet with the phone system. Recently, the unit designated for the shop speakers has been blowing the built-in breaker on the back of the unit. Every few hours the receptionist lets me know that the shop isn't getting pages, and I reset the breaker. The amps are both plugged into the "surge protection" side of an APC UPS.
We have an old Executone phone system connected to the "aux 1" ports on both amps. A few months ago, I reconfigured the amps into two zones so I could better adjust the volume and the load, and to get ready for zoning in our new VoIP system. Until last week, it was working fine. There are many options for the speaker voltage / resistance on the back of the amp, but I just maintained the same terminals that were setup some 15 years ago
I'm not sure if the incoming signal could trigger the breaker overload, the attached speakers (too many? short-circuited), or if the amplifier just needs to be replaced. I'm looking for possible next steps in troubleshooting. . Thanks!