Darrell Thorp, the Grammy-winning engineer behind this Sunset Sound session, shares his go-to mic choice for bass amp: a large diaphragm condenser, usually a U87 or U47 FET.
A 421 dynamic works as a solid backup when a condenser isn't available. For slow, funky basslines, he'll turn the amp down low and mic it with a tube U47 for a darker, more character-driven tone.
He also notes that Nigel Godrich usually reaches for U67's or U47 FET's, backing up the idea that a quality large diaphragm condenser is rarely the wrong call on a bass cab.