Articles › May 2011
Dual or triple opposed subwoofers have drivers that fire from opposing faces of the enclosure and radiate with equal power over the entire operating range of the device. The sum of the sound pressure does not measure the same in a half-space environment as it would with a single radiating surface orthogonal to the microphone. Some of the radiation points end up further away and pointing away from the measurement microphone, which under represents their peak SPL capabilities during outdoor measurements. This is a look at developing a compensation file for these types of subwoofers and whether it is indeed warranted for this scenario.