Here is an adaptation of basic Class A MOSFET Headphone amplifier. Below schematic and the board layout. Its designed as a single sided PCB board. It`s always a good idea to use a low ESR coupling capacitor. Also use a ceramic capacitor in the supply and a good heat-sink for the transistors, at least one for a 5 Watt heat dissipation.
Amplifier is for use with pretty common 32 Ohm headphones. For input I used RCA connectors, and for output the preffered 6.35 mm TRS (Tip-Ring-Sleve) Jack!
At the bottom you can find a link for with EAGLE .brd & .sch and an exported .pdf. I will later add a tutorial on exporting your boards from EAGLE, so you can really do all by yourself. For link to EAGLE software go to “Links” section of the site