user manual
TA-890
Whilst several manufacturers have attempted to solve this using DSP based systems at present there is not a working solution in the market.
In theory by splitting the LF energy into several bands and then spacing the left/right stacks differently depending on frequency this effect can be solved or at least minimised. However, due to the available space within a venue and the maximum
If a large system is going to be configured with left and right bass stacks it can be preferential to stack the bass bins in a wide fan with the onstage column flush and parallel to the stage and with a large distance between the left and right stacks. This ensures each bass array has some pattern control. Angling individual columns outwards also helps to minimise the cancellation effects detailed above.
There are several ways of minimising cancellation problems, involving different numbers of enclosures and different stacking options.
Creating Directional Bass arrays:
It is possible to build bass arrays which provide an amount of horizontal pattern control and also go some way to solving the problem of multiple summation and cancellations on a large system. All the examples detailed below presume that the enclosures are placed in free space and are therefore not effected by the constraints of a venue.
Bass in a line:
The above balloon shows the pattern control given by spacing units ¼ of a wavelength apart @ 50Hz (5.5ft apart).
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