[2gumby2]

 **SOLD**                    I recently purchased the Objective 2 headphone amplifier from Flying Dutchman Audio, but after receiving it I thought it was a little large for my travel purposes. In perfect condition with rechargable internal batteries and external power supply. It has a very nice case with laser etched Flying Dutchman on top. $100 and includes shipping to any U.S. address. Link to details on this amp design are here:
http://nwavguy.blogspot.jp/2011/07/o2-headphone-amp.html