Okay, many bassphiles (or 'bassheads'), like me once wondered within those products of Sony Extra Bass XB series which is the better especially between the XB-400 and XB-600 for regular dubsteps, brosteps, electrohouses or any fun wacky bass songs. (XB-900 is just the additional). This is my...

Go for e7k (the newest) fiio, i used it on xb400 and oh god....put it to bass 10+ and treble +6, welcome to audioheaven! :D with amp, u might not wanna worry how much bass that can be pumped out of the cans but HOW WELL the headphones can handle bass and very low frequency response (my XB400...

I had both pairs of XB 400 and 600. If u prefer comfort go for XB 600, however the sound IMO is worst than XB 400. XB 400 is like thumping bang with good eq that is bu for XB 600 IMO, it's a sore deception to the eyes. XB 600 sounds like a blanket over the 400 if u ask me. Thus, 600 is much...