This headphone amplifier circuit is different to conventional modern construction techniques in that it is air Wired,P2P (peer to peer) or free form wiring just like in the good old Valve days before the intervention of PCB's and the transistor.
Rather than a traditional enclosure, the hole circuit is encapsulated in polyester resin to enhance the internals.
If your reading this and thinking why do you need an amplifier for headphones then click here
Although allot of cMoy headphone amplifiers are designed to be portable this one is designed for the desktop although a battery pack could be made also.
This is a pretty long instructable so "make a brew" as we say in Yorkshire and get comfy .
On the upside there is plenty of pictures :)