Price is as below:
1. PCB only: HK$100 (about US$13). (BOM and Circuit will be provided after order)
2. Fully Assembled board (please specify FDA-1B or FDA-2A use): HK$400 (about US$50).
3. Shipping cost will be HK$31 and paypal fee add 5% on top. This will be waived if brought with the DAC kit FDA-1B or FDA-2A.
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Jitter measurement with FDA-2A DAC and the result is EXCELLENT:
Major highlights:
1. Use AD1955 and WM8805 key parts with single end output.
2. Same super sound discrete IV converter used in the FDA-1, & FDA-1B.
3. Natively support up to 24bit/96k with NOS module. Support 24bit/192k with AD1896 ASRC module (sell separately).
4. Maximum 4 digital input and one I2S input (total 5). Default control board provided will control total 4 inputs only (either 3 digital + 1 I2S or 4 digital input).
5. Compatible with many USB2.0 24bit/192 modules: Tested Xmos reference design and Amanero USB2.0 to I2S module. Interface board to Amanero USB2.0 to I2S module with or without “Isolator” will be released soon.
6. Control bus for AD1955, WM8805 and other signals are provided for future expansion into fully software mode.
7. DSD input bus is provided for future upgrade.
Details in the manual below:
Go to Store page if you want to buy this kit : http://www.fetaudio.com/store
This is a single ended DAC using AD1955 DAC and WM8804/5 receiver. Here are some photos of different versions:
V1.0: FDA-1B with AD1955 DAC chip hardwired on a SSOP board.
V2.0: WM8804 + AD1955 with 3 digital input and one I2S.
V2.1: WM8804 + AD1955 with 4 digital input and one I2S.
V3.0: WM8805 + AD1955 with 4 digital input and one I2S.
V3.1: To be made soon.
On the V3.0, some jitter is measured and the result is quite good. See attached pdf document:
Note that there are connectors at both the AD1955 and WM8805 chips for the control bus and thus software mode can be turn on if necessary. This DAC board is really flexible for future expansion. DSD bus socket is also reserved for the AD1955 (SCLK, DSD-Left, DSD-Right, DSD-Phase). Thus this DAC board is able to experiment on DSD input and also mono mode of AD1955 if a software controller is available.
Version 2 is available NOW! Added features on circuit diagram. The converter board is also usable for most OLD DAC using CS8412 receiver chip!!!
WM8804 to CS8412 Version 2 Converter board details: WM8804 to CS8412 V2 Converter Board Technical Details Rev2 (updated on 13 Feb 2020)
Below is V1 details.
I have sold hundreds of D1V3 & D1V33 few years ago but I have not forgot continue support for this classical DAC using the best R2R PCM63 DAC chips and Jfet IV common gate topology. There is a new life to the old classic DAC if you upgrade the receiver from CS8412, CS8414, or DIR9001 to WM8804 which many diyers as well as hi-end audio professionals are all agreed to its best sound performance. I believe it is the best news for all D1V3 and D1V33 users as well as other DAC users because this converter board can output 4 digital modes and thus it can meet most DAC technical needs.
| 16-bit Right-Justified Mode |
| 24-bit Left-Justified Mode |
| 24-bit I2S |
| 16-bit I2S |
Please take note that there is a chance that this converter may not work perfectly or even not working in other DAC platform as there is no 100% compatibility due to different chips in different time of history. But as usual, I shall advise my best guess after reviewing the DAC circuit before you buy and provide remote trouble shoot support as usual.
Technical details: WM8804 to CS8412 Converter Board Technical Details 3
Having understood DIYAUDIO member Alex_twn to modify an Apple AirPort Express to output I2S signal to converter FDA-1B to a wireless “AirPlay” DAC, I have not done anything for more than a year. The main reason is that the US$99 AirPort Express will become useless with Zero second hand value after modifications. Secondly there is no clear indication of the position of the I2S signal inside the AirPort Express circuit boards and tracing the circuit will be difficult for many DIYers. Thirdly the quality of the internal Master clock jitter of the AirPort Express is still unknown! Since the AirPort Express has an Optical Digital output socket in optical mini plug format (shared with the analogy output), there is a simple solution to use optical connection between AirPort Express and FDA-1B. With the WM8804 input receiver quality in FDA-1B, the sound performance will sure has very high assurance level.
Here is my version of wireless FDA-1B DAC playing from a 4 years old notebook with winxp & iTunes. I use the Airport Utility for windows version 5.5.3 due to my windowXP version. Also I create a new wireless network for the AirPort Express so that it will not increase too much wireless traffic for my original D-Link wireless Router DIR-652 (note this router is connected to internet via a boardband modem). The connection between AirPort Express and DIR-652 is by a Lan Cable. With this connection, both the wireless networks can also be able to access internet. Note that the Optical cable must be one end with mini plug for AirPort Express and the other end with square plug for FDA-1B Optical input. The total cost of upgrade is only US$115 and it is really a simple upgrade relative to the XMOS solution! Awesome, it is wireless for both PC and Mac platforms!!!
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