The focus of the topic was to find out/address issues of the bass problem, in the current set up. Changing gears should be considered if nothing we can do about the current set up.
As previously reported, after removing all the BDR carbon boards from source, DAC, the bass was improved a lot.
Removing such boards from Pre and power, it was further improved.
Lastly, removing TAOC boards from the speakers, additional improvement was found.
Now, the system had good bass, with more details, and I am very happy.
In brief, I might say such boards have killed the bass in my system. (Your system might be different)