There was a very very small company that went by Red Wine Audio that made really interesting desktop stereo amps, DAC's and headphone DAC/amps that used an internal battery that was charged from the external power supply. If I recall, you could choose between AC or DC mode but this was back around 2011-2014, but the wood variants look really nice and I swear they also had an ifi like tube hybrid mode in some models. I think the designer/owner, Vinnie, changed the company name, and I'm not really sure where he went with the name change. I found out about the older products from a John Darko post about 10 years ago. I don't really follow home stereo but I've read about some use battery power in high-end products charged the same way the Red Wine Audio, products were. Lastly, I remember one audio shop near where I grew up swore by and only stocked the 9v battery-powered Grado amp over the ac version.
Back on topic, I received my Mojo 2 and Poly, and after fully charging I tested the Mojo 2 before setting up the Poly (still dealing with setup issues) and compared it to my Mojo 1 and Hugo 2. The first headphone I tested was my ZMF Aeolus Ziricote and was pleasantly happy with the sound as I swear the stock turning does live up to Rob Watts's updated sound signature. Testing the Hugo 2 was a very odd comparison as the Mojo 2's new 4 band EQ settings hand me won over the Hugo 2. I would be happy with the Hugo 2 but really enjoyed this pairing, I wonder what Zach will say about pairing ZMF headphones paired with the Mojo 2. My Violetric v280 obviously has far more power but again the Mojo 2 gave the Aeolus an interesting change, mostly in the upper midrange to treble. More open and detailed however maybe it's psychoacoustics but will be pairing those 2 for the next month to get the full picture.
The second pairing was with my Campfire Andromeda Gold's and absolutely love this pairing so far. It lived up to its extra bass from the 2 additional bass BA's and still kept the bass articulate. I experienced similar attributes of the Mojo 2 updated tuning from the Aeolus with the Andromeda Golds. I will need many more hours to let my personal hype not skew what I'm really liking coming out of the Mojo 2. I reset the Ultra HD DPS EQ and didn't mess with the EQ settings as I wanted to really take my time with this pairing. So far this was my favorite IEM pairing as I felt my Solaris 2020 might need to take advantage of the DSP EQ. I didn’t count the Solaris 2020 test as it was less than 10 minutes.
I'm going to test my HD800s, Clear Mg Pro, and maybe one more headphone/IEM over the weekend. But my 11-12 hour first-day impressions were very positive, as I can usually tell pretty quickly if I'm going to keep a new purchase in my collection and the Mojo 2 is most defiantly staying, an extremely good first impression.