I've been getting into electronics myself so this is more interesting to me now. I know this may be tough, but all I want in a headphone/practice amp is reverb! Don't need too many parameters, maybe just decay and mix. That may not interest you though and you are building it so...

If I may ask, how did you get into building your own stuff? Any nice learning resources you can share? So far I have built a simple metronome, added extra knobs to childrens synths, built a horrible fuzz, and gotten started with a breadboard for pedal prototyping.

This dude named beavis is my go to man for learning right now. His articles are really well suited for the begginger and explain things much clearer than most.
http://www.beavisaudio.com/bboard/

Good luck though, look forward to seeing how it goes. Oh yeah, I think the MM made a cool headphone amp pretty recently. Based on the stepabout preamp I think? I wonder if that is for sale?

Either Digital or Analog delay is a bit more involved than signal buffering/eq. There are some kits you can check out at http://buildyourownclone.com/



You've actually done really well. I've been into electronics for a long time, but only recently have gotten back into doing my own builds. I have a nice bipolar PSU kit done and I did a balance headphone amp, thus far. So you've actually gotten more stuff physically built than I have! I tend to design a lot more than I build...



Wow! I love the look of that prototyping board! Also make sure, if you haven't already, to check out http://www.diystompboxes.com.



I don't know, but if you're interested in headphone amps also check out the diy section of http://www.head-fi.org/.

Cheers!

The thing with electronics is that it is SO heady and technical that it makes my head spin! I think at least some of it can be simplified and decoded for the average human. At least to a workable degree, I don't pretend to understand how it all works. Just a general idea of whats going on. Seems true of many subjects actually, even music. It gets so complex and technical, which is cool in for those who want all the details of course. But I have found that there may be a more simple explaination to make the concepts usable. Maybe not as in depth but still.
Sometimes I think its best/more useful to explain a concept to a 10-15 year old. Exceptions abound of course, but ya know what I mean. Whoops Im going off now...