Headphone amp

Shizelbs
Shizelbs Posts: 7,433
edited January 2004 in 2 Channel Audio
Anyone in here familiar with the benefits of a headphone amp? I would like to hear your opinions on the difference they make. I have a pair of Sennheiser HD-590's, and am slightly interested in investing in an amp. I realize that headphones are not too big of an interest, on this forum, or anywhere, so I don't expect much of a response, but any response would be great.