Regarding 'gear' in my experience, some works / blends better than others - As others have said in the past, gigs were still successful with bass amps of much smaller wattages than are commonplace today.
My most recent gigs have been with a Phil Jones rig and the bass sound has been phenomenal - I've owned a load of stuff and believe that this is down to the thought process applied to its design rather than what's on tap with the volume control.
But the biggest improvement I have made, is due to my attempts to isolate the guitar sound from by bass rig - usually with the mixing desk cover.So that much of the uncontrolled mid frequencies from the guitar are not straight down my ears.