Some people in the audio industry, including some leading figures, believe that loudspeaker diffraction effects - the re-radiation of sound from sharp cabinet edges and the interaction of grazing-incidence radiation with baffle features such as the cones of other drive units - have no audible effect, despite their inherent time-smear. Avalon Acoustics designer Neil Patel clearly doesn't have much truck with that nonsense. His speakers use faceted cabinets to minimise diffraction effects (although we're more used to seeing rounded cabinet forms used for this, Olson showed decades ago that bevelled cabinet shapes are also effective) and he goes to the unusual length of making the grille covers an integral part of the diffraction control regime. So don't remove them, OKI KH.
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