Headphone amps are not snake oil. They do enhance the sound. It is up to each person to decide if they want to spend about $200 or more on a decent headphone amp to get better sound.

Headphone amps give more detail, soundstage, bass, and liveliness to your music. I'm enjoying my Little Dot MK III amp and for the price of $200 or so, I think it's worth it. My integrated NAD amp has a headphone jack but doesn't give the quality of sound that comes from a dedicated headphone amp.

My headphones are Grado SR60s and Sennheiser HD595, both easy to drive. However, each has shown improvement in sound when plugged in to the LD MKIII. I'd think your Sennheiser 600 will also benefit since it is a harder to drive headphone.

Here's a link to a review of the LD MK III
http://www.compudio.ca/2007/06/little-dot-mk-iii-exclusive-review.html

There's also many other good amps. Just browse head-fi.org where there are lots of knowledgeable users.

Last edited by lkv_11; 11/06/08 02:31 AM.