raybone0566
Headphoneus Supremus
portaphile 627 pairs well with the 600 & 650's. Drives them with authority.I personally am looking for a portable amp so I can bring my set up between the office and home, where I have non-portable headphones at both. A desk amp is having to buy twice as much gear. Also, even if I'm using a non-portable headphone, I like the flexibility of being able to move from one end of the house to the other, depending on where the kids/wife is.