So, the Chinese board I bought was about $150 with the USB-i, but you had to solder your own headers on for the USB-i. Meanwhile, if people care about ease of use and don’t want to do it that way, they could actually buy the miniDSP 2×4 HD and just remove the shell and wire it up inside of a speaker. Then it is just mounting connectors and extensions cables to the back.
I would have to search for the specific ones I bought at lower price, as I got that board with the USBi for $154 (I have 3 USBi and 4 boards with the pcm4202 and pcm1798).
Now, I checked out the software that came with them, but it doesn’t allow for FIR filtering, but otherwise can do mostly what you would want.
But once I get that made, I’ll also show that.