Ensure the optimal height and decouple your speakers and stands from the floor to achieve enhanced audio quality with these premium fillable bookshelf speaker floor stands. Two sizes of top plates are included to allow for universal speaker compatibility and filling bags are included for filling these premium speaker stands with your choice of substrate. A separate channel for cable management allows for a cleaner look. Spiked feet provide grip on carpets and rugs or set on disks with silicone padding prevent damage when used on hardwood floors.