Turbosound LMS-D26 Manuale Utente

 

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 roll-off available from common 
crossover systems we consider this to be neither effective or practical. 

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. 

 

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. 

 

 

 

The above balloon shows the pattern control given by spacing units ¼ of a wavelength apart 
@ 50Hz (5.5ft apart).