Is the grill removable?
Does it provide a better sound off axis? I am saying better because I think it is where the sound is lacking when you are over 20-30% off axis. I am asking because I usually listing music off axis when I am not sit in my stereo sweet spot.

Nad C356 DAC & C515
Axiom M3v3
Grant Fidelity RPF-120 MKII
Analysis Plus Black Oval 12&10
JRiver 19