Yeah... "Pros" don't try to fix their eq in the mix by adjusting the amp during the recording phase. In fact most set their amps tone knobs to 12 o' clock until after the perfect mic placement has been found. Then they proceed to tweak their amps to find "their tone" since they know the mic, mic placement, and everything else in the signal chain affects tone. Once their tone has been found and recorded, muddiness is cleaned up in post. Though if recorded correctly it shouldn't need drastic eq changes anyway. Never heard of anyone rolling their bass down to 1 that takes their tone seriously. Maybe 10 o' clock if they have a bass heavy amp and the mic is picking up a lot of lows.