So far so good. Sadly the only worth while headphones I have around are some old Sennheisers HD 280 Pro which are 68ohms. They drive them like a champ. The sound is crisp, clear and full of punch. But won't know if they can really push until end of the year when I plan on getting my Beyerdynamic DT 770 Pro which are 250ohms. Will update review then.