Got this little thing today. You don't know how small it is till you see it. But whatever, let's get to the sound.
That's what I have to test with, which is basically my computer ($0), laptop ($0), Philips SHP9500 ($80), Shure SE535 ($500) and a Fiio X5+E12A stack ($500). Ecletic, to say the least. The Fulla is $80. Initial impressions are pretty much this:
It's a pretty good sounding DAC+Amp combo! It's not terribly smooth or detailed, but it has plenty of juice to drive things bigger than iBuds and it sounds a lot better than what you get in computers and laptops - much cleaner sound, lower and fuller bass and hey, it has an analog volume control without channel imbalance (PC output set to 20%). I personally think the amp module could be a bit better, since it's noisy for an IEM and the E12A squeezes a lot more SQ from it, but for $80 you get some compromises.
In regard to noise, I will comment about the Amazon reviews mentioning people hearing odd stuff from the Fulla: It's not silent, I agree. The SE535 easily picks noise from it, the SHP9500 cans exhibit similar noise at higher volume, and you can hear really angry hissing coming out of the Fulla on idle, but, once you play music, particularly of less silent genres, it gets inaudiable, or at least doesn't bother me. In fact, for headphones, I don't see this as an issue at all. For IEMs, less lucky, but the SE535 is one hell of a sensitive IEM.
Anyways, bottom line, when you consider a decent DAC costs $45 (say, HiFimeDIY Sabre) and requires an amp costing close to it (say, Fiio E06, $30), buying this little thing isn't such a bad deal. If I had to rate it between my PC (0%) and X5+E12A (100%), I'd give it a score of 55-60%. That's a pretty stupid rating system, but c'mon, I'm commenting on a product called Fulla Schiit.
Might post further impressions next weekend when I have some time to tinker with it.