ProtoDAC TDA1387 X8 project

[hifinet]

That is just for a PCB. No parts.

It doesn't need to be anything special. You might already have a suitable linear power supply (wall wart) in the 6VDC to 12VDC range. The old linear supplies weigh more than the SMPS, because of the larger transformer (you wouldn't want one thrown at you). In the US, it usually says "Class 2 transformer" on the label.  Current rating of 500mA for ProtoDAC alone is much more than required. Maybe you have an unused one around the house. This will get you the transformer, diodes and capacitor in one inexpensive unit.

Power supply requirement of ProtoDAC alone is 52mA (6.5mA X 8). 

Then add the LT1963 module with a cap on the input and the appropriate 10uF cap on the output. The regulator will make it very low noise. You can easily drop from 12V with little heat (0.364W).