I just recieved this little piece of audio equipment today, and I'm nothing short of impessed!
The DAC is a very large upgrade relative to the 3.5mm jack of my motherboard (although it is said to be relatively good for a motherboard). It really adds detail to the sound and removes the annoying hiss I hear at quiet parts, or when no music is playing. On top of that it also makes the sound a bit smoother and easier to listen to, maybe this is also because there is no hiss anymore.
I have also compared the headphone output of the NFB-12 to that of my Little Dot MKIV SE.
Here I find that the MKIV definitely wins, which is to be expected given that it also costs more
. I'm still an amateur audiophile and I don't have much experience in commenting on the SQ of gear, but what I find most notable that the MKIV has far better soundstage. We're still speaking about headphones so the soundstage isn't perfect on the bests of setups, but I still find that the NFB-12 is lacking quite a lot when it comes to soundstage.
Then when it come to the sound signature of both amps, I find that the NFB-12 is lacking a bit of bass, and the mids of the MKIV are more detailed and smooth.
I haven't yet burned him in, so I'll tell you if I have changed my opinion in a week or so, but I think not. This is simply because the MKIV is a better amplifier, and although the NFB-12 might improve, it still can't compete with the Little Dot MKIV SE.
On a whole other note, when I ordered Edwin told me that it would ship around the 10th of June which would have been 25 days from then (I placed the order on the 16th of May).
But in fact it shipped one week early on the 3rd of June, and arrived a mere three days later at my doorstep.
Customer of Audio-GD is also good, although I have noticed their English is quite bad, which wasn't the case for the customer service of Little Dot, a similar Hong Kong based brand.