The IsoAcoustics Aperta Stands are sculpted aluminum acoustic isolation stands designed for medium-sized professional studio monitors and bookshelf speakers. The Aperta isolation stand is 6.1-Inch (155mm) wide x 7.5-Inch (190mm) depth x 3-Inch (76mm) height and is rated for speakers weighing up to 35lb.Tilt AdjustmentOffering tilt adjustment of up to 6.5 degrees, the Aperta stands will help you optimize the placement of your speakers and focus your tweeters to ear level. An important aspect of the speaker stand design is the ability to focus the speaker to ear level, optimize its position relative to the listener and eliminate soundwave reflections off the supporting surface.Patented IsoAcoustics IsolationThe IsoAcoustics patented isolation system provides superior isolation and decoupling from the supporting surface. The stands are biased to keep all energy in alignment with the speaker drivers, providing greater clarity and focus.Exciting the Supporting SurfaceThe 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.Reducing Internal ReflectionsInternal reflections are vibrations reflecting back up the speaker cabinet which causes smear. Smear is a result of artifacts replicated in both channels which are perceived to be in the middle, causing the stereo image to collapse. The IsoAcoustics isolators reduce internal reflections to eliminate smear. The result is an improved stereo image of natural spatial sound.