A while ago I made this headphone amp to go with my Goldring DR150 headphones. It’s a Lehmann BCL clone and I use it to listen to music via my PC. Here are a few pics from the build, I used a broken ATX PSU as enclosure, not pretty but it works 🙂
The above is old information. I built an improved version from an empty PCB with the components of my choosing.
Old headamp, no longer in use/working
I’d say the sound is great! I swapped the NE5532 for a LM4562, and that was an improvement.