Sold this last month to a member that frankly did not understand the intricacies of connecting an AGD DAC..............I took it back in the community spirit. What the DAC needed was to have the USB Re-Flashed This According to discussion with Kingwa. I had to remove the top plate to complete the process (
http://www.audio-gd.com/Firmware/AmaneroforWinEN.htm)
DAC is working 100% now with no issues. It is still as NEW and sounds great
Looking for 750.00 OBRO (Or Best "REASONABLE" Offer) (Retail from Underwood was 1200.00+ shipping) Buyer covers double boxed shipping, I will cover the Fees if you meet my asking price.
Only Trades I will consider are a MINT pair of Sennheiser HD650 or HD800 Payment for Balance of value in either direction is OK
If you are offering me a TRADE you need to understand I have marked the DAC off nearly 50% of new, So don't approach me with a 500.00 pair of headphones wanting 500.00 trade value. Any Trades you offer are USED it does not matter if you bought it yesterday and never removed it from the box.
Info & Reviews abound here's a snippet:
R2R-1 FPGA PCM/DSD DAC
Simply one of the best DACs I have heard with a musicality, resolution, and soundstage I have not heard equaled in DACs costing three to four times as much. One of my favorite discoveries of the year, congrats Audio-gd for a much-deserved Product of the Year Award!
-Gary Alan Barker
In the new review in headfi.guru they say:
"To say that the Audio-gd R2R-1 met all expectations would be an understatement, in terms of musicality, accuracy, soundstage, detail, timbre, noise floor, and resolution, it is one of the finest DACs I have heard."
"If I were starting out from scratch and needed to purchase a DAC and Headphone Amplifier combination, this would be my choice, not to belittle my current reference gear, which I love, the Audio-gd gear is just that good".
Read the review at:
https://headphone.guru/audio-gd-r2r-1-fpga-pcm-dsd-dac-done-right/The R1 is an R2R full discrete DAC that uses 8 groups fully discrete R-2R DA modules to combine into a real balanced push/pull decoder. it also uses 4 group fully discrete real balanced DSD native decoders. It uses a fully discrete real balanced current transmition design. Jitter is kept ultra low by using dual ultra high frequency 90/98 MHz Accusilicon 318B femtosecond clocks to a provide synchronous clock for the whole unit without using a PLL up-frequency. The R1 works up to 32bit/384K with DSD512 asynchronous USB transfer thru the Amanero 384 FPGA synchronous clock. The entire whole digital circuit is built with single FPGA and 5 CPLD programmable chipsets to separate the different configured circuits to avoid interrupting the data stream process in parallel mode. The unit supports firmware updates future sound quality updates and all digital process mode settings are accessible by buttons on the front. In an R2R ladder DAC the unit switches resistors in parallel mode. An ultra-fast FPGA controls and corrects the R2R ladder. This parallel design mode controls every bit respectively and therefore achieves unprecedented performance. In parallel mode only 1 clock cycle is needed to output all the data so sonics are improved and the output is more analog like. After the D/A conversion by the R2R D/A modules the analog signal is transported by fully discrete matched-transistor output stages. The R1 DAC uses high quality low noise, low flux leakage, R-cores transformers to supply all digital parts and the left and right analog boards. There are in total 13 ultra-high speed and ultra-low noise power supplies built in and double stage PSU technologies are used to remove power supply voltage fluctuations.
Compare this DAC to anything we have heard under $2000.00-$2500.00.
