We have a 4mA SE dacchip (TDA1541) instead of a BAL (PCM63) +2/-2 mA. Offset is regulated by PR, so can I go with same values? a 3,5/4V Output instead of caonical 2Vout would be useful in my system...
Yuppieeee 
I already have a good DAC with AD1862 (Audio Alchemy DDE3.0) but I prefer the sound of 1541.
I already have a good DAC with AD1862 (Audio Alchemy DDE3.0) but I prefer the sound of 1541.
It depends on what you want. For me, that dac has a lot of parts that would be abandoned, and too much cutting and splicing in of new parts and components that I would want.
For diy I would start fresh and build it the way I want. I did that, taking the path of I2S out of a single board computer ( I used an Odroid but Pi is popular too) to an isolator, to a FIFO and clock, to a I2S to simultaneous converter and finally to a TDA541A board.
Isolator and FIFO were from IanCanada (diyAudio) and I2S converter and TDA board from RyanJ (diyAudio).
I would consider this to be close to the state of the art for TDA1541A.
For diy I would start fresh and build it the way I want. I did that, taking the path of I2S out of a single board computer ( I used an Odroid but Pi is popular too) to an isolator, to a FIFO and clock, to a I2S to simultaneous converter and finally to a TDA541A board.
Isolator and FIFO were from IanCanada (diyAudio) and I2S converter and TDA board from RyanJ (diyAudio).
I would consider this to be close to the state of the art for TDA1541A.
There are SPDIF to I2S converters available.
You can start simple with a SPDIF to I2S converter, then I2S to simultaneous converter, to the D3 board.
Or even simpler, you can start with the SPDIF to I2S converter to D3 board. The D3 board can accept either I2S or simultaneous signal.
Computer, isolator, FIFO/reclocker may be added later, or not.
Example of diy SPDIF to I2S:
SPDIF to I2S
Example of ready to use board with more features, may be used without computer:
IanCanada board
You can start simple with a SPDIF to I2S converter, then I2S to simultaneous converter, to the D3 board.
Or even simpler, you can start with the SPDIF to I2S converter to D3 board. The D3 board can accept either I2S or simultaneous signal.
Computer, isolator, FIFO/reclocker may be added later, or not.
Example of diy SPDIF to I2S:
SPDIF to I2S
Example of ready to use board with more features, may be used without computer:
IanCanada board
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I could start from this I2S DAC board and add a good USB & Spdif to I2S converter:
https://www.ebay.it/itm/165216525833
https://www.ebay.it/itm/165216525833
I have the D3 board by diyAudio member Ryanj. It uses smd components, and for digital that is a good thing as it allows for optimum component placement. It has on-board voltage regulators and requires a +26V power supply and also a +5V power supply if the the 2mA output offset is to be nulled and on-board IV resistors are implemented.
TDA1541A D3 dac board
Here is a picture from the diyAudio D3 thread of the stuffed board:
TDA1541A D3 dac board
Here is a picture from the diyAudio D3 thread of the stuffed board:
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You’re the ‘Talian king, you can do anythingThanks, Ben. It looks fantastic but I cannot solder a two-sided SMD board since I don't have the means and the skills
Have you tried building anything smd? If you have a magnifier and a fine soldering bit it's really not a problem. Just practice and find what works for you. I do the blob one pad - hold the part with tweezers - melt the blob - slide into place - solder the other pad method. I built a D3 no issues. Have a go!Thanks, Ben. It looks fantastic but I cannot solder a two-sided SMD board since I don't have the means and the skills