I think when many people refer to “tight” bass they are trying to express a juxtaposition to the perhaps more common “loose bass”.
A sealed box will often provide tighter bass than a ported box, but if comparable bass output is to be achieved, the sealed box will typically do it with less efficiency.
A sealed box will often provide tighter bass than a ported box, but if comparable bass output is to be achieved, the sealed box will typically do it with less efficiency.