Here is my first headphone amp build. It's based on the TangentSoft tutorial and related articles. It's using an OPA2132A and other than using bigger caps and a gain of ~5 it pretty much follows the "stock" Tangent design. There's a couple issues (largely because of the big caps) but overall I'm happy with how it turned out.
More info on my build if you're interested: http://www.lungstruck.com/projects/cmoy-headphone-amp/
If anyone has thoughts/suggestions/criticism, I'd love to hear it. I've picked up a lot of good information from these forums.
Edited by lungStruck - 8/10/13 at 7:22am