Wisdom in mind,   enthusiasm at heart.

NFB-12.1

Discrete  DAC+ Headphone amplifier / Preamplifier
Built in 2 Pieces Hi-end grade WM8741 Chips

NFB-12.1 Price:  USD215

Fully balanced design built by discrete analog stages without any OPA and couple caps in the signal channels.
Non- feedback ACSS analog output stage .
Uses 20W high performance transformers . More than 10,000uf audio grade NOVER capacitors are used to ensure ample and smooth power feed.
Total of 6 PSU groups are used to purify the power supply.
Applies a custom order ALPS 27 volume pot for reducing channel imbalance and improving on sound quality.
3 channels digital input :   coaxial /  Optical / USB
DAC output :   RCA  (User can setting with either variable and fixed output level )
Headphone output :  6.3MM SE
Resolutions support 16 / 24-Bit with sampling rate support 44.1kHz, 48kHz,  96kHz.
Supports up to 24Bit/96 KHz (USB model) and 24Bit/192KHz ( coaxial  inputs )
Supports 2X , 4X and 8X oversampling customers setting

Sound Characteristics: 
    "Neutral but smoothness sounding ,it doesn't sound skeletal or digital (or metallic). There's meat aplenty on them bones . It's a sigma-delta DAC chip implementation without the dryness, neutrality without the emotional disconnection" - John Darko
Feedback :
http://www.head-fi.org/forum/thread/524263/audio-gd-nfb-12/615#post_7261330
http://www.digitalaudioreview.net.au/index.php/audio-reviews/digital-source-reviews/item/177-audio-gd-nfb-2-dac-19-series