Xb Bass System
Xb Bass System
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Figure 2 — Frequency Response
The frequency response of the Xb was
measured on axis in the far field in an
anechoic environment using a swept sine-
wave signal. The Klark Teknik DN8000 digi-
tal electronic unit was used to provide the
necessary 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 Xb, (i.e., the included
horizontal and vertical coverage angles at
the -6-dB points) was measured with a full-
spherical measurement system as de-
scribed in Figure 1.
DIRECTIVITY FACTOR R
θ
Q
Without Crossover and EQ
With Crossover and EQ
Figure 4 — Directivity
The directivity index, D
i
, and directivity fac-
tor, R
, of the Xb were measured with a full-
spherical measurement system as de-
scribed in Figure 1.
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