ProtoDAC TDA1387 X8 project

[hifinet]

The difference between the two is the one you posted uses a common mode choke, which is connected to both the positive and ground. The P089ZB just has a choke on the positive. But if you can't get the parts, you can't build it. There is a thread in diyA about SMPS and using common mode chokes, and I don't think they could fully remove the noise with the common mode choke either. You just need to lower it enough that you can't hear it.