Portable Headphone Amplifier Circuit - need help

[navarro_boyz1]

http://s7.postimg.org/t2m09d0x7/portable_headphone_amplifier_circuit_diagram.gif

This is the circuit diagram that i want to build for my headphone. The circuit shown is for the left channel only but i want to modify it a bit for a stereo version. Moreover, i want it to be powered by +5v from the laptop usb port. Can anyone help me out?

Thank you....

This is the original link for the circuit diagram>
http://www.learningelectronics.net/circuits/portable-headphone-amplifier-circuit.html

 

[audioguru2]

It poorly feeds DC through the headphones which is bad for them.