Electro-Voice Speaker Xds Double Subwoofer System, Frequency Response, Beamwidth, Directivity

Xds Double Subwoofer System

Xds Double Subwoofer System

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, Di, and directivity fac- tor, R , of the Xds were measured with a full- spherical measurement system as described in Figure 1.

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