CARDIOID SET UP
The cardioid preset must be used in a sub array of three SW215A. Two box must be oriented towards the audience and one must be turned in the
opposite direction (typically the box in the centre of the array). The bottom and the top boxes must have the STANDARD PRESET, the box in the
middle must have the CARDIOID PRESET. The audio signal sent to all boxes is the same.
The CARDIOID PRESET has the same response of the STANDARD PRESET, but to obtain the maximum cancellation on the back side of the array it
has the phase inverted and a proper level and delay setting.
The figure below shows two typical displacement of the array. The first with all the boxes in horizontal position for a total height of 1713 mm and
a width of 800 mm. The second one with all the boxes in vertical position for a total height of 800 mm and a width of 1713 mm.
NOTES:
When placing the cardioid array keep a distance to walls or other obstacles of at least 80 cm (2.6 ft) in order not to affect the radiation of the
reversed cabinet.
When placing multiple cardioid arrays keep a distance between them of at least 120 cm (3.9 ft) in order not to maximize the combined radiation
of whole arrays.
80 cm min.
2.7 ft min.
120 cm min.
3.9 ft min.
80 cm min.
2.7 ft min.
stage
wall or other
big ostacle
bass sum direction
bass cancellation direction
audience floor
