Kraegorn
100+ Head-Fier
Amps give an "Uumph!" straight to your headphones. It also modifies the sound, or how some would say, color it, how much of that depends on the specified amp. If you're getting a low end amp, don't expect vast improvement over the headphone jack on your computer, you might be disappointed. Also keep in mind, it takes time to extinguish the difference as you take time to get used to your gear.