If you are reading this, you obviously care about your wired headphones, and now you're wondering if their performance can be enhanced even more. The answer is yes, and the answer is a headphone amplifier or headphone M-DAC (digital to analog converter). These great amplifiers can breath new life into your sound. A great application for a headphone amplifier is if you are frequently using a laptop, sometimes their built in DAC (digital to analog) can become tired, using an amplifier can drastically improve sound quality to your wired headphones.
If you own a set of high-impedance headphones you most certainly need an amp, but you already know that ;)