So I've recently become the owner of a set of Sennheiser HD-650s.  Although I already have an e7/e9 combo which certainly can drive them along with my Grado 80is and Sony mdr-7506's.  I was wondering just how much am I missing out on without a nicer amp/DAC?       After much delving...

Hi, I'm a long time lurker, and finally was not able to find the information I needed on this amazing site.  I'm looking to eq my headphones with SineGen software and a vst EQ through my foobar.  Yet I cant seem to get SineGen to work.  I've tried multiple versions and download sites, yet I...