Hi everyone, first post. I just got my 2160 and am so far, loving it. One thing though, has anyone tried to drive some high impedance headphones through the receiver? My Sennheiser 650s sound a bit low. I know they are notoriously power hungry but I thought the 2160 would drive them fine. Has anyone else tried the 650s with the 2160? Does anyone recommend a separate headphone amp to connect to the 2160?

Thanks!!