My Amarra 4 is my digital source, phono pre (Due to the lack of mic preamps on mine which is an LIO-8, requires an SUT or HO cart.) and a preamplifier. I am also using the headphone out with my JH13's and it is definitely up to the task. It's probably the best home amp that I've used with the JH13's in terms of it being dead silent, no hiss whatsoever. It is a significant step up from the ULN-2, which I really enjoyed during the time I owned.