Martin Audio Wavefront W8L Longbow Handleiding (137 Pagina's)

Handleiding

Stacked general purpose horns vs low curvature line array elements

Note that individual elements have to be closely spaced to develop the benefits of a

line array. Stacking traditional, vertically formatted multi-driver cabinets (with,

typically, an LF driver near the bottom of the cabinet and an HF driver or horn near

the top) simply doesn’t work.

The following illustrations compare the poor coverage characteristics of vertically

stacked general purpose loudspeakers with properly designed, closely coupled line

arrays elements.

The vertically spaced HF horns will have hot spots directly in front of each horn. The

outputs from these multiple elements will add or subtract in the mid and far field

depending on the wavelength and relative propagation times.

Three tightly arrayed low curvature horns at 8kHz

Closely spaced elements will sum more coherently.

As the number of coherent elements is increased forward projection strengthens and

the side lobes decrease.

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