There seems to be debate about whether vibration absorption feet can improve the sound quality of loudspeakers. In theory, the overall FR shouldn't change, but resonances that occur in the speaker cabinet or in the room should be reduced, which in turn, should improve some aspect of perceived sound quality. To test whether there were any measurable differences in unwanted vibration, I obtained waterfall plots of a single B&W 805D2 loudspeaker using REW and a UMIK-1. The bookshelf loudspeaker was placed on top of a built-in wood shelf in a small room used as an office. The products used were 4 Vibrapod 2's and 4 IsoAcoustics Orea's. I'm sharing the results in case anyone is curious. Note: I did not correct for 1-3 cm difference in height, but this shouldn't affect the spectral decay, which is what I was interested in.
Speaker with stock tiny rubber feet:
Speaker with Vibrapod 2's:
Speaker with IsoAcoustics Orea's:
Speaker with stock tiny rubber feet:
Speaker with Vibrapod 2's:
Speaker with IsoAcoustics Orea's:
