How to install the
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 three R-core transformers (135W total) separate power supplys
for the digital part , right channel and left channel.
More than 50,000uf audio grade NOVER capacitors are used to ensure
ample and smooth power feed.
A total of 11 class A PSU groups are used to purify the power
supply. To achieve high S/N, the control circuit is powered with
Uses most Hi-end grade parts and exact match transistors.
Four-channel digitally controlled relay-based volume control to
avoid channel imbalance and improve sound quality. NFB-20.2 has 99
steps volume level control in both high gain mode and low gain mode.
5 groups digital input :
AES / BNC+RCA coaxial / RCA coaxial / Optical / USB
3 groups analog preamp input :
XLR / RCA / RCA
Preamp / DAC output :
XLR / RCA / ACSS (variable)
Headphone output :
4 pins XLR / 6.3MM SE
USB Audio Class 2 High-speed Input from PC/MAC
Supports full speed Asynchronous Transfer Mode
Resolutions support 16 / 24-Bit with sampling rate support 44.1kHz,
48kHz, 88.2kHz, 96kHz, 176.4kHz, 192kHz ( USB model)
Supports up to 24Bit/192KHz (coaxial & AES )
Supports 2X , 4X and 8X oversampling customers setting
Memorizes all settings and it could resume the last settings when
"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
If only the RCA or 6.3MM headphone is used, is the NFB-20.2
being wasted or not fully utilized?
a real balanced DAC built in headphone amp . It has balanced output
(ACSS, XLR and balanced headphone output) and single-ended output
. There are 4 ACSS amplifiers in the NFB-20.2 for balanced outputs and balanced inputs. Even when a
single-ended output is used, the ¡§Dual WM8741¡¨ DA chips will perform
fully thanks to the fully balanced design.
NFB-20.2 have 3 feet
under bottom side for the best balance state , if customers want 4
feet , please ask the custom order .
Modification guide on
headphone jack for 4-pin balanced headphone output.
Click here to read:
Parts for the modification is USD30. (Includes one female 4-pin plug
and one male 4-pin plug, some tapes and some WBT tin solder.)