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Audio-gd products are design and tested based on the AP SYS-2722
specifications (The top-drawer professional equipment in world)
Since 28th March, R2R 11 had the
updated firmware and shipped with the update firmware.
The update for removed the "pop" sound
while switch the PCM music tracks in computer.
The customers bought it after 28th March,
don't want update the firmware.
•Discrete DAC single ended headphone- and preamplifier
•True NOS , R-2R discrete ladder DAC
•Built in pre- and headhpone amp
•Built in 2 groups DA-8 R-2R modules with 450MHz ultra speed CPLD
•Unique noise process technology will remove any digital artifact
•DSD native , DXD, PCM up to 384KHz Support
•Amanero Combo 384 USB interface
•Soldered with silver tin for all parts on board
•High quality ALPS 27 volume potentiometer
•Without any mute switches for keep the signal without
2.Toslink optical SPDIF
3.RCA coaxial SPDIF
•RCA single ended (Output is configurable: fixed or variable)
•Headphone 6,3mm jack
Pros and cons of R-2R
1.R-2R will not convert the
clock signal into the output signal.
2. R-2R is not sensitive to
jitter while Delta-Sigma DA is much more sensitive to jitter.
3. The output signal is much
more precise compared to Delta-Sigma DA .
1.THD today is extremely good with
Sigma Delta chips; R2R ladders are good too but not as good.
2. Glitches and accuracy of the
ladder resistors are very difficult to avoid and require complex
technology to resolve it.
R2R 11 CHARACTERISTICS
•R2R-11 are a breakthrough of discrete R-2R designed ladder dac¡¦s.
Audio-GD are first in the market offering high performance discrete
R2R in this price-range.
•Two pcs DA 8 modules equipped with ultra-high speed CPLD processors
to correct the discrete resistor ladder. Unique parallel processing
to achieve superb performance .
•Analogue section design based on Audio-GD¡¦s ACSS current driven
technology, fully discrete transistors amplifiers.
•Double stages ultra-low noise high speed power supplies offers a
musical and black background and favorable transparency .
•Built in Amanero combo 384 USB interface. Amanero offers satisfying
and compatibility and marvelous sound quality.
•True NOS design. NOS is less sensitive to jitter and offering
neutral sound. To avoid the digital artifacts, a uniquely designed
noise rejection processing technology is applied.
•Native DSD support. no switch applied between the DSD and PCM
decoder outputs for avoid effect on sound quality but had not
obvious switch pop sound appear .
•Built with purity components: all resistors are KOA / Vishay
low tolerance resistors , silver tin soldering for all
parts on board and ALPS 27 volume potentiometer .
•Option to set Neutral or Warm sound (Jumper setting) according to
Sound flavor different
between R2R 11 and NFB-11:
They are not which is better but most different
on the flavor and worth own both just like you own some different
detail, dynamic, control but not bright and hash.
R2R 11 had the
exotic sound quality! Smooth, coherent and analogue, it had not
emphasize anythings but had not miss.
E.g : You can image
the NFB11.28 like a high defined digital photo but the R2R 11 is a
like real oil painting.
If you are a
new audiophile , you should choice the NFB11.28 better than R2R 11,
NFB11.28 had the modern sound may easy suite the new audiophile.