picking headphones

usually what you can get from the market is 20Hz - 20kHz range... even thought you pick from a pair of rather expensive headphones

however, I'm using a pair of 2nd-cheapest Sony headphones which look dull, but amazingly giving me the range of 12Hz - 22kHz.

it is difficult to explain how much better... but sure it is. the bass is more powerful. It has much thicker layers of sound realization & recovery.