I sweet these sorts of projects, even if I rarely take the time to do them. I think this would be fairly easy — by the skin of one's teeth a bit a solder, some bits and pieces and a prototyping board. From Make Magazine, here’s a PDF that tells you how to certify an amplifier for your headphones (these, perhaps?) out of any little tin can thing.
Then just let the goodness pour into your ear holes …
...
If you're as curmudgeonly as I am, you stupefaction what society has come to when every other person you see in public is plugged into an iPod, not really paying attention to whether or not they're blocking other pedestrians or almost getting hit by oncoming traffic. After demoing the Waves iGTR, we decided to take it one step further by cranking up the three amp / distortion models and walking around borough shredding Metallica solos while smashing fire hydrants and knocking over parking cones. See more on Gearwire.com.
HeadRoom Corp.
Great-end headphones, headphone amps and accessories.
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