Of all Woo amps I owned, all of them have transformers made by Hengda.
http://www.hktdc.com/manufacturers-suppliers/Sichuan-Chongzhou-Hengda-Electronic-Factory/en/1X044VIX/
I'm a long time lurker here. It amazes me when someone or some manufacturers can get away with these issues. Some if not most of us are spending countless hours on honest jobs to buy what we want and here we get Cavalli Audio who basically selling craps for 5k?? I applaud those who expose these issues.