What is Tight Bass?

I am all about the effect of ports or sealed speaker construction as well as amplification, but the room resonance is the biggest deal of all. Not just by way of speaker/subwoofer placement, but whatever can be done to flatten the frequency and decay response will provide tight bass. 

@johnnycamp5 

Hi. With help from Acoustic Frontiers, I was able to flatten the bass response significantly by way of sealing the ports and subwoofer positioning. My main speakers were creating a 60Hz resonance on the vertical axis that a crossover almost eliminated. I just received several half-round diffusers/bass absorbers that are fairly broadband but are efficient at 60Hz. Looking forward to hearing what happens after I install them. I agree with you that overdamping bass without affecting the frequency response is an unusual problem.