Flown Center Subbass Line Arrays.
Where staging and rigging considerations permit, a flown center stack of subwoofers can give excellent results.
There is zero lobing, the horizontal coverage is essentially 360°, and the vertical coverage can be controlled well by beamforming.
Figure 21 shows the coverage of a flown center cluster of 12 EV Xsub woofers in an arena venue. The woofers are hung in a straight line, an optimized set of beamforming delays are applied. As well, level shading has been applied.
The result is a subbass coverage pattern that maintains constant tonal balance over the entire listening area and
In this example, the delays have been applied in pairs. That is, each adjacent pair of woofers has a drive channel. This is more economical than having a separate drive and amplifier channel for each woofer.
However, should a separate drive channel per woofer be available, even better coverage would be possible.
