Sony MH1 Earphone And Convert OMTP To Standar Stereo Earphone Plug

I am now looking for a new affordable earphone. This earphone will accompany me at the office or at my traveling. The portability is the main purpose and the most important is good sounding earphone. This Sony Ericsson MH1 earphone is my choice to fulfilled all my needs.

Lithium Battery Cmoy Headphone Amplifier Using AD823 (Part 1) The Building Process

Previously I have built many headphone amplifier. The size from portable, medium or fully amplifier case size headphone amplifier. Then what I found that portability is an important factor for building a headphone amplifier. You can find my previous project here and here. This project is about tiny headphone amplifier that will not sacrifice the sound quality.