Report Woo Audio GES in Headphone Amplification Posted August 8, 2015 It will take some time for this to happen but in general I wouldn't recommend connecting headphones to them as they are essentially broken. What's wrong is they use the wrong ballast resistors for the bias supply or, as I've seen twice, just don't use any. This will burn off the coating and fuck up the diaphragm. Well this scared me a bit. Seems that Woo is not a good option in terms of reliability.