d&b audiotechnik 4S/5S, Руководство пользователя

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CPL circuit
The CPL (Coupling) circuit compensates for coupling effects
between the cabinets when building closely coupled arrays. CPL
begins gradually around 1 kHz, with the maximum attenuation
below 200 Hz. To achieve a balanced frequency response, the
CPL circuit can be set to dB attenuation values between 0 and –9.
Positive CPL values create an adjustable low frequency boost (0 to
+5 dB) and can be set when the system is used in full range mode
without subwoofers.
2.4. Dispersion characteristics
The following graphs show dispersion angle over frequency of a
single cabinet plotted using lines of equal sound pressure (isobars)
at –6 dB and –12 dB.
Fig. 8: Isobar diagram horizontal
4S
Fig. 9: Isobar diagram vertical
Fig. 10: Isobar diagram horizontal
5S
Fig. 11: Isobar diagram vertical
Fig. 7: Frequency response correction of the CPL circuit
d&b 4S/5S Manual (1.1 EN) 8