Thanks for the quick reply, Tamu.    Soldering is not a problem, nor is circuit reading.  I've done enough electronics troubleshooting components, repair and building on standard and SMT PCB's over time.  Now, circuit design... that's a talent I would like to accomplish.    You mentioned...

Hi all,   I've followed Head-Fi for some time, but have never posted a question... until today.   I'm sure that this has been answered in prior threads, but now that I've had my first set of good headphones (AKG K172 HD) I'm ready to build a portable amp.  I've researched the CMOY's and...