How to bridge Sumo Polaris I

I have two Sumo Polaris I amplifiers. Is it possible to mono bridge these amplifiers? They will be powering Magnepan LRS speakers. I am new to this and I don't really have any idea nor can I find information on this topic. Thanks!
 
This is one of the SUMOs that is bridgeable. You need to find a way invert the input signal to one channel and then hook your speaker to both of the RED speakers terminals. Some of the 80s Yamaha preamps have both normal and inverted outputs.

Craig
 
You said to "find a way to invert the input signal to one channel." What does that mean exactly? Please forgive my ignorance as I am new to this and don't want to break anything. I have a the Sumo Athena pre-amp. I don't believe it has inverted outputs. Is there a way to accomplish what I want without getting another pre-amp? Thank you.