Well this thing does sound damned good, but I hadn't done my "can I hear it" test...
How close can you get to the speaker before you hear anything. Well on the mid-range there is a bit of noise up close (1/2 meter or closer). Only when my plasma TV is on though. Interestingly it's exactly the same noise my you can hear the TV making anyway.
The output buffer board is the one I designed for the ADAU1966. The AK4468 recommends different filters, and much faster op-amps. The ADAU1966 app note has 10MHz parts, I am using 8MHz. The AK4468 recommends 80MHz parts from Texas Instruments!
So I may just design a new buffer board. I should have done it anyway.
An electronics engineer and a long term electronics hobbyist. I like tinkering with stuff and making things.