You know how a Marshall 1960 cab can be switched between stereo and mono? Would it be possible to run two seperate amplifiers through one cab by using the stereo mode? Assuming both heads can be set to 8 ohms.
Yup. :P a/b box it to both amps. I don't see any issues with it. Actually you wouldnt even need to a/b it if you didnt want to... just split the signal with something.