Thanks for the info! Actually, since the Vol. 4 2021 remaster has been released, it is now my 'least favorite' Sabbath remaster. If I had to pick either that one or the Black Box mastering (I am so happy I don't have to!), I would pick the BB. The 2021 remaster is the perfection of horror via sound - even though it isn't extremely compressed. A masterpiece of bad work.