Here's the story. At band practice one night, my QSC RMX 1850HD set off the breaker in our practice room. It just so happens that our practice room is the basement of the drummer's house. The house is over 100 years old, we don't know how old most of the wiring is. This was a one-time occurance and hasn't happened again. I'm running one side of the amp at 4 ohms and the other at 8 ohms, so I believe thats 340 watts on one side and 600 on the other. I want to get an Acme Low B4 and run the QSC in bridged mono, to give it the full 1800 watts. If I do this, what are the chances that I might trip the breaker again? Do high wattage power amps have a tendency to do this?