Pros: boosts volume and bass, excellent sound quality
Cons: slight hiss on quiet songs, had to order online
the fiio e5 is excellent value and is my first headphone amplifier. i bought my shure srh840 around early march and wasn't 100% satisfied so i wanted an amplifier. i didn't listen to everyone when they said my headphones wouldn't benefit and i was right to do so. these improve both the treble and bass. also it allows me to play louder without a degradation in sound quality. i also ordered a fiio l3 lod which makes it sound crisper with my ipod classic. i think everyone on head-fi should try this a tleast once.