18" subwoofer speaker, subwoofer box design

 The powerful Blackline WSX-181 sub-bass system has been designed to be used with large scale Blackine W3+ and W8C+ systems to extend and increase the total low frequency output power. It can also be used as the low frequency section of a bi-amped or tri-amped H2/H3 system. The WSX-181 provides good mid-bass punch with extended sub-bass output from one direct radiating 18"(460mm) drivers with 5"(125mm) high temperature voice coils.