IsoAcoustics Aperta 200 Speaker Isolation Stands - PairAbout the Aperta Series stands The isolators manage the energy of the speaker to reduce vibrations resonating through the supporting surface to eliminate dissonant sounds in the listening area or joining rooms. Internal reflections are vibrations reflecting back up the speaker cabinet which causes smear. Smear is a result of artefacts replicated in both channels which are perceived to be in the middle, causing the stereo image to collapse. The