PAV2V (Pocket Amplifier 2 Version 2), sells on amazon for around $55-$65.  

What you said that as you can probably see, modding accessibility tech is not at all unlike modding headphones... not everybody gets heavily into it, but almost everybody tinkers i don't agree.

Just go to amazon to find the one what you want.

Check for dry joints. check every resistor  for increase in value and change if more than 10% out right or not

Audio-Technica ATH-M50 Professional Studio Monitor Headphones with Coiled Cable From rock to punk to reggae to blues to classical to hip-hop to folk, these headphones allow me to hear new aspects of the music I've been listening to for years on end, and have given me a new appreciation for...