Whilst many audiophile headphones have a built-in headphone amplifier, they often fail to deliver the rich experience you thought you were paying for. External headphone amplifiers are a seamless link between your sound source (whether this is a computer, a portable player, a CD player, a preamp or any other component) and your headphones and promise to deliver the results you pay for.
Like any room speakers, your headphones need a power amplifier to get the best out of them. Using an amp enhances your enjoyment of music by delivering thicker bass lines, precise detail and more linear sound coverage.
You will not believe what your headphones are capable of when driven properly.