For sale a pair of Hirata Tango XE-20S power output transformer. They are the more desirable power output transformers if you are thinking of building 300B based amp or replacing the current output transformers on your 300B amps. Other tube amps that uses 2A3 or 45 tubes can also use the XE-20S. Cosmetically, they look good. One small corner ding on one and other surface blemishes here and there.