not keyboard stuff, though i have plenty that stuff coming soon.
budget bravo headphone amp from massdrop
![](http://farm8.staticflickr.com/7443/11317271285_b9f95e96bf.jpg)
So far working fine with my AD900s and recently purchased JDS Labs ODAC. The sound is noticeably different than going through my Logitech speaker system headphone out as headphone amp. I don't know if can call it better, just different, it is a budget amp after all. giving it time.