Tight bass is very simply: when the signal stops, so does the woofer (in fact, the entire loudspeaker). To not "stop on a dime" is to produce "overhang". In the world of loudspeaker design, there is the concept of "critically" damped woofers, as well as over-damped. A Google search will lead one to lots of literature on the subject.
What is Tight Bass?
I’m confused. Speaker size with a large woofer…can it be tight?
is it about efficiency? Amp power? Electrostatic?