no need to worry . I got an email saying they are halting preorder right now due to usb problem and demand to high.Got to wait until after January
I think that applies to the NFB-11 but the NFB-12 is still available to purchase.
As far as I can tell from the website the NFB-12 has not had the USB issues. It looks like they fixed the NFB-11 with the addition of a PLL circuit, but they are overloaded with demand.
For the unitiated, Audio GD put the NFB-11 out and it had a problem. They paid for shipping back to China for a fix but it has taken a long time to find a solution that does not compromise sound quality. Here is what they say on their website "The ES9018 PCM mode (I2S input) working not steady as SPDIF mode .
Some engineer friends adviced to us, converte the USB interface from I2S to SPDIF for avoid the ES9018 working at PCM mode but we refuse, we believe this is the first simple way but will degrade on SQ.
Final ,We addition a high performance PLL chip ( typical jitter is 21 PS) in NFB-11/NFB-10 for improve the USB interface clock performance .
Now we had test 40 units NFB-11 near month for confirm we had fix this issue. Benefit from the high performance PLL join in, the sound from USB is audibly improved .
Thanks all pre-order customers , your patience reanimate us working without tire.
We will shipping these around 20 units for users test at first . We wish other pre-order customers understanding and waiting some days, once we get feedback these 20 units through test, we will shipping other units as soon as possible."
I think the thing to keep in mind that the DAC chip has a lot less to do with the sound than all the other parts of the DAC.
It does seem this is a difference between the NFB-11 and NFB-12 as the Wolfson dac didn't seem to have this problem to begin with.
Now on ordering this unit, I accepted that it may take some patience on my part, but that is part of the deal when getting a great price.....