Subwoofers - Grille off or on?

Stanwal,

You seem to be overly defensive or are puffing yourself, because I didn't see a single post in the thread that questioned your experience in listening to speakers with or without grills. The complaint about the use of the term always referred to the premise of OP's opening question.

You seem the one with the need to chill.

db

If its operating as a true subwoofer below 50hz or so then you shouldn't hear any difference on or off. Unless it vibrating on baffle.

Some loudspeakers are designed to be used with grilles in place some without.

I'm with Johnk on this one. The rational part of my brain thinks the wavelengths of a subwoofer's output would be much longer than the point at which diffraction effects would be audible. However, sub grills can darn sure rattle. I'd get a test tone cd like the ones Rives or Stereophile sells and check to make sure no grill buzzes need attention. I've had to use dabs of Blutack to damp the odd buzz in a sub grill.