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Figure 2 — Frequency Response
The frequency response of the Xf was
measured on axis in the far field in an
anechoic environment using a swept sine-
wave signal. The Klark Teknik DN8000
digital electronic unit was used to provide
the necessary crossover filters, equalization
and time delay. One watt of power
(2.83-volts rms at 500 Hz) was applied to
the mid band of the mid-bass section. The
sound pressure level was normalized for an
equivalent one meter distance.
Figure 3 — Beamwidth
The beamwidth of the Xf, (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
tor, R , of the Xf were measured with a full-
spherical measurement system as described
in Figure 1.
8
Xf T wo-Way, MB/HF System
, and directivity fac-
i
With Highpass Crossover
Without Highpass Crossover
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