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Figure 4—Directivity
The directivity index, D
, and directivity
i
factor R
(Q), of the system were measured
θ
with a full spherical measurement system
as described for the "Polar Response."
Figure 5—Distortion
Distortion for the system was measured
on axis in the farfield in an anechoic envi-
ronment with an input signal that would
result in a sound-pressure level of 115 dB
at one meter. The Dx38 digital electronic
unit was used to provide the necessary
crossover filters, equalization and time de-
lay. A frequency spectrum typical of close-
miked rock music was employed. The
sound-pressure level was normalized for
an equivalent one-meter distance. Plots of
second and third harmonic distortion are
shown referenced to the fundamental.
Figure 6—Impedance
The impedance of each frequency band of
the system was measured in an anechoic
environment.
Figure 7—Wiring
The wiring diagram of each frequency band
of the system is shown.
Xw12 T wo- W ay , F ull-Range Floor Monitor
2nd Harmonic
3rd Harmonic
LF
HF
5
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