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Frequency response correction of the CPL function

Isobar diagram horizontal

CPL function

The CPL (Coupling) function compensates for coupling effects

between the cabinet and close boundary surfaces. CPL begins

gradually around 1 kHz, with the maximum attenuation below

400 Hz. To achieve a balanced frequency response, the CPL

function can be set to dB attenuation values between 0 and –9.

Positive CPL values create an adjustable low frequency boost (0 to

+5 dB) at around 65 Hz 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.

24S

vertical setup

Isobar diagram vertical

24S

horizontal setup,

horn rotated

Isobar diagram vertical

d&b 24S/24S-D Manual 1.1 en