That B label was identifying cap replacement. Meaning a bag of 20ufs in bag B to replace caps labelled B. All caps you mentioned have now been changed and my wife can no longer hear her TV shows.
I did not write down the pot values but I didn't notice any obvious differences. I also performed a quick capacitance check on the tone caps as compared to each other and did not notice anything either. I also seems when I power up the amp, the bass tone works for almost a minute or so then fades away. Is it possible to get a good cap or resistor reading at idle but it fails under power?
Thanks for the compliment. I have tried to take care of it.