So... if anyone remembers, I snagged a pair of ECR-800s from YJ, and the headband somehow broke on me.
I've gotten them repaired by a very skilled technician, and recabled with a Gamma pro cable. I can now confirm that they will run off Stax amplifiers, on normal bias
I've also replaced the connectors on the Sony transformer box with Justin's teflon Stax connectors, so the next test now is to run a Stax headphone off that box.