http://www.samsontech.com/products/p...cfm?prodID=163
I have the unit, box, card, wallwart, everything. The above link explains what it is. It can also be used as a headphone amp for bass, but it has some noise-pumping that can be irritating, at least on Ipod buds which are very sensitive. The hiss would probably be quieter with full-sized phones. It's a little old I think for a digital product, but someone may want it. $75 obo. Pick up in Washington, DC area (PM for exact location) or I could ship it.
(Or, I might trade it and $100 or so for a GK Backline 600.)