"Tight" as in "the bass became more tight."
This is determined by system Q - an overdamped, critically damped or underdamped system.
Q of less than 0.5 is tight. (impression is less bass until you turn it up and then it seems like someone is firing a machine gun in the room - think New Order Blue Monday)
Q of .7 is balanced ( a good compromise but still not much bass especially at low levels)
Q of more than 1.1 is muddy and will resonate "warmly" with plenty of bass ( guess what they use in most designs....)
Low Q means low efficiency and high cost.
High Q means high efficiency and low cost (typically a small lightweight woofer with small voice coil in a ported design)
Hi-Fi = High Fidelity which means you are faithful to your wife and buy only small tall narrow speakers that are unobtrusive. Opposite of Hi-Fi is Ja-Bla = Jack-Black where you suffer male menopause and buy a Harley Davidson and get massive speakers in an effort to have a system that sounds as loud as ACDC.