Optional Add On (sold separately): 

IsoAcoustics Aperta Sub Isolation Stand

With a sculpted aluminum frame and patented IsoAcoustics integrated isolators, the Aperta Sub introduces a new standard in acoustic isolation for subwoofers. The Aperta Sub decouples the subwoofers from the supporting surface to prevent the physical transfer of energy that excites the supporting surface, causes room rattle and disturbs your neighbours. The patented IsoAcoustics isolation also prevents the subwoofer vibrations from reflecting on the supporting surface and being conducted back up the subwoofer cabinet. Managing these reflections eliminates muddy bass smear and reveals greater clarity and definition.