A headphone amp takes a standard head phone out from your PC/ PMP and amplifies it to drive high impedance headphones. Most headphones in the market are high impedance and PMPs or most PCs can’t drive them to their maximum musicality. Chu Moy came up with a really cheap and miniature design for a headphone amp that would fit in an altoid box.
Look here for an article on how to build this.
here is a schematic…
Price, Noise floor, clean power supply design, and great drive makes this a killer DIY amp.
here is a video by “Dev” on how to build this and some cool ideas..
Part I
Part II
