Ok time to get things on track. Please try and keep things constructive.
Avian, you obviously know quite a lot about electronics and your feedback is certainly welcome. Please do be constructive rather than outright condemning though. Please remember that most of the people here are new (some more than others ie me) to electronics and enjoy the learning curve. The points you raise are certainly helpful and I'm sure will be taken on board by the guys putting these things together. Proof that more people contributing means a better end result for everyone.
There is unfortunately a lot of reactive type posts going on here which I am going to delete out of the thread. Some by regulars and some by external people. In this case both are a out of order and inflammatory leading to people getting hot under the collar. Again, please keep things constructive, this type of posting is not what we want to achieve here.
Most of you guys here have TDA dacs and love them dearly. It is time to start using that as a bit of common ground and getting back to that