Electro-voice X-Array Install Xi-1122-85 Manual do Utilizador descarregar pdf (Página 6)

X-Array Install

Xi-1122/85 Loudspeaker System

X-Array Install

Xi-1122/85 Loudspeaker System

Figure 5— Distortion

Distortion for the system was measured on

axis in the farfield in an anechoic environ-

ment with an input signal that would result in

a sound-pressure level of 115 dB at one meter.

The DN8000 digital electronic unit was used

to provide the necessary crossover filters,

equalization and time delay. A frequency

spectrum typical of close-miked rock music

was employed. The sound-pressure level was

normalized for an equivalent one-meter dis-

tance. Plots of second and third harmonic dis-

tortion are shown referenced to the fundamen-

tal.

Figure 4— Directivity

The directivity index, D

, and directivity fac-

tor, R

(Q), of the system were measured with

a full spherical measurement system as de-

scribed for the "Polar Response."

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