Subwoofer Bunker is a customized acoustic enclosure used to control / eliminate the unwanted sound waves. These acoustic bunkers is a combination of multi-layer high density material used to make an omnidirectional subwoofer more focused towards the audience or the listening area.
It has been proven to be quite complicated to control the low-frequencies generated from a subwoofer. An Acoustic Bunker is considered to be one of the most effective solutions to control the side and rear sound propogation.