Specifications

Vertical Boundary effects

A solid floor will act as a reflector. This will cause a vertical stack to perform as if it

were double the length, giving a useful low frequency boost accompanied by a

narrower, more complex polar response.

For instance, an 8 high ground-based stack of WSXs will act like the top half of a 16

high stack.

At 80Hz its smoothest vertical coverage will be from the floor to its own height

(4.6m) + 16.5º. It will, therefore, cover seats 19m above floor level at a distance of

50m and 34m above floor level at 100m.

It is possible to reach higher seating areas whilst retaining the long throw

characteristics of a tall vertical stack by electronically “tilting” the system - see

Section 4.11.

Note that flexible floors may actually absorb sound at some frequencies so the

situation isn’t always so simple in practice.

Horizontal - 6dB coverage

The following table gives the approximate horizontal coverage angles of typical WSX

arrays - ignoring boundary effects.

WSXs Wide Horizontal coverage

(on sides) 40Hz 80Hz 160Hz

2 Wide Wide 75º

4 Wide 75º 35º

8 75º 35º 17º

16 35º 17º 9º

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