Oh wow, I am surprised I did not run across that link. I guess it should work with two PSU's..
I am in Europe and using 240V input, and I always thought that offsetting the voltage by -2 will probably have a different effect compared to 110V input.
Have you tried any voltage offsets to get a better result from the miner? I see there is also a +1 voltage offset which I am assuming would try to draw more power from the PSUs and in effect should get a higher TH/s. I'm speculating because I cannot test it with my setup either.
what you are saying about the two psu's could be valid, but I don't have a big psu to validate and don't want to spend more money on this miner as I am doing it in order to learn and explore new opportunities.
I will write to Avalon tech support and I hope they can confirm, otherwise they should correct their website.
I don't know enough about PSUs or the internals to state what exactly could happen either negative or positive when using two with this miner, so if its working now probably ok to stick with what you have. It also wouldn't hurt to confirm IF you can get Avalon support to reply back...