It will depend on which placement you choose to use. For example, in the corner placement, each subwoofer should be placed adjacent to the left and right speakers, and how far apart they will be will depend on factors like room size. With that being said, we recommend that you maintain a distance of at least 5ft between each subwoofer so as to not create a build-up of low frequencies in your system and avoid a boomy/resonant sound. Whatever placement you choose, it is important to also calculate for delay times to avoid any phase issues.