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R2R-11 mk2

Real NOS discrete R-2R DAC design

Fully Discrete Transistors Headamp And Preamp All-In-One.

Output power rated at 3800 mW @25 ohm, driving most headphones easily.

4 fully discrete R-2R DA converters (2 per DA-8 board) implementing two push/pull decoders.

2 fully discrete native DSD decoders.

Fully discrete current signal transmission design.

32bit / PCM384K /DSD512 asynchronous transfer using the Amanero 384 usb input

The whole digital circuit is comprised of 3 CPLDs (programmable chips) supporting firmware update to improve sound quality in the future.



Please note: The product improve cause the inside or outside change without inform .
Summarize Use Manual Specs Custom Option Shipping Cost

Price:  ( Exclude shipping cost)
R2R-11 mk2 Standard version:  USD599
R2R-11 mk2 Full upgrade version:  USD668 (
USB module clocks upgraded to Crysteks, built-in isolator for the USB module)
The free mini remote controller not in warranty
Purchase the metal remote controller simultaneous price is USD40.

Please send your address, name  to audio-gd@vip.163.com  get the quote.

Click to download the driver of  Amanero combo 384

Low price but no compromise

Some things you may need to know about the NOS design before purchasing:?
1AMany facts not commonly known about the NOS design :
        In the 1970'S, the first generation of CDP were released , and they used an NOS design .
        "NOS" stands for "Non Oversampling". Using a NOS design, specs are ordinary because the limited signal bit depth affects THD and S/N.
        Despite the fact that quantization noise affects S/N, the R-11 mk2 still achieves very low noise levels, much better than most tube amplifiers and turntables, and much like a modern OS DAC .
        To get better specs on paper, many designs apply a quite complex LC analog filter after the D/A conversion. But the LC filter usually does not have a flat response and the large phase shift it causes also affects sound quality considerably.
        In 1980's, oversampling and FIR filter were invented, and allowed improving sound quality compared to applying an LC filter. Good specs were obtained on paper, so this technology has been largely applied ever since.
        But some people still liked the sound of the NOS design better and felt that without the extra processing, it did a better job at preserving the original character of the sound, like in real world, trusting their ears rather than specs.
        Therefore if you want good specs, the NOS design definitely is not for you.

2ADiscrete servo stabilized power supply:
Using the latest designed discrete servo stabilized power supply to feed the digital circuits, the noise level is comparable to that of a battery, but without the dry and thin sound characteristics of it, and thus the product's operating temperature is significantly lower than that of the previous model. The analog circuit are still powered by a pure class-A regulated power supply for the best sound results (New upgrade)

3ATube-like sound:

        The basic NOS design has a tube-like sound or a vinyl feeling . It may have to do with distortion being similar to these, typically between 0.01% and 0.1%. Some expensive USA-made DAC has even inferior specs but a lot people consider it has a beautiful sound .

       The R-11 mk2 distortion + noise level is similar to a vacuum amplifier or turntable and to the expensive USA- made DAC referred upon.
THD+N <0.04% (Digital input, output 2V, full scale )

Frequency band -3DB at 90K (outputting 2V, full scale )

APlease note :
        The R-11 mk2 signal path is very simple, the USB and spdif receiver directly outputs an IIS signal to the R-2R decoders (DA-8s) without any other component involved, and a non-muting design is applied. Therefore, when changing tracks, there will be a weak popping sound, but much weaker than with the previous generation R2R 11.

R2R-11 mk2 feature:

1. 4 built-in 24bit R-2R decoders (2 push-pull channels) and 2 native DSD decoders.
2. USB input with optional galavanic isolators.
3. High-quality R-core transformer power supply.
4. 9-group of power supplies overall for the different components. The R-2R modules and analog output stages are powered by the 3 groups of pure class-A PSUs. 3 groups of ultra-high speed chip PSUs and 2 groups of servo-controlled discrete PSUs are used for the digital parts . The control module and volume boards use a separate PSU to avoid any contamination to the digital and analog signal components.
5. The unit has two gain levels, 12DB on low gain to drive headphones with over 95DB sensitivity, and 22DB on high gain, enough to drive the HE6, which has a 85DB sensitivity. There are two jumpers built-in allowing an additional 6DB to drive headphones with even lower sensitivites.
6, Relay volume control boards built-in for accurate channel balance and transparent sound . 0.1% resistors are used in parallel to increase the effective tolerance to 0.05%.
7, Two jumpers are built-in to optionally make the sound warmer .
8, Fully discrete transistor amplifier design, applying the ACSS technology .
9, Features a Neutrik headphone output jack



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