Grills OFF or Grills ON ???

Whenever I'm in the mood for a 'serious listening session', I'll pull the grills off my Tannoy D-700 speakers.... It just seems to unveil them.

Of course, it's a hassle...and I've got to remember to put them back on before going to bed, even though it's often already the wee hours of the morning (two cats roam my house).

Anybody else doing the same?

Also, how about the subwoofers? Same thing?