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Xds double subwoofer system – Electro-Voice Speaker User Manual

Page 6

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Xds Double Subwoofer System

Xds Double Subwoofer System

6

Figure 2 — Frequency Response
The frequency response of the Xds was mea-
sured on axis in the far field in an anechoic
environment using a swept sine-wave sig-
nal. The Klark Teknik DN8000 digital elec-
tronic unit was used to provide the neces-
sary crossover filters, equalization and time
delay. One watt of power (2.00-volts rms at
70 Hz) was applied to the mid band of the
low-frequency section. The sound pressure
level was normalized for an equivalent one-
meter distance.

Figure 3 — Beamwidth
The beamwidth of the Xds, (i.e., the included
horizontal and vertical coverage angles at the
-6-dB points) was measured with a full-
spherical measurement system as described
in Figure 1.

Figure 4 — Directivity
The directivity index, D

i

, and directivity fac-

tor, R

, of the Xds were measured with a full-

spherical measurement system as described
in Figure 1.