I'm in the process of going completely off the grid and my source is now sorted with the Chord Hugo. However I find the Hugo lacks weight and feels a little strained when driving the HD800s directly and I much prefer the sound with my Mjolnir in the loop. What I'm looking for therefore is something with similar characteristics to the Mjolnir (power, transparency and a sweet treble) but which runs off battery with a run-time of at least 6 hours, and preferably 8-12 hours. It doesn't have to be portable, it just has to be off the grid.
I'm aware of the Bakoon HPA-21 and Red Wine Audio offerings, although I've not tried either of them yet. Is there anything else that would compete head on with those? I'd prefer sold state if possible and a battery system that looks after itself (constant trickle charge or auto-switching dual batteries) so long as it provides complete isolation from the mains.
Edit: The amp needs full size RCA inputs too, but doesn't need a volume control as the Hugo can handle that. Ideally I'd be after a battery powered headphone power amp, but I'm not sure if they exist.
Edited by Stormfriend - 4/29/14 at 9:25am