27VTX B 18 | User Manual11.2 - MINIMUM SPACE BETWEEN CARDIOID STACKSWhen creating large subwoofer arrays using cardioid blocks of B18 subwoofers, some space should be allowed between the stacks tomaximize rejection directly behind the array. As a minimum a distance of 1.5 meters (4.9’) between stacks should be allowed.1.5m (4.9’) min11.3 - MINIMUM SPACE FROM A WALLWhen cardioid subwoofer stacks are placed in front of a solid structures (like a concrete wall or a solid stage), some space should beallowed behind the array for the cardioid effect to develop. A minimum space of 1.5 meters (4.9’) should be allowed.1.5m (4.9’) min
