Hello allz..

I wanna know something about headphone..
When searching for headphone, what are the spec we must look into?
Generally, when seeing the spec, it is always show like frequency response, driver diameter and whatnot.. what are those mean?

I am looking for headphones now.. My music liking is something bass, like techno, dance music. Something like Skrillex and others.

Also, can U commend on this one:
For now, my target is like Audio Technica ath-m50

What is speaker diameter means? like 32mm, 40mm and in case with ath-m50 45mm.. Don't really understand.. is it bigger means better? I like bassy song like Skrillex, as I mention before?

Hello.. Can please recommend me easrphone for rm100?
I love techno, so love to have bassy earphone..