Controller Settings; Operation With E-Pac - D&B E12 Manual

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Frequency response correction in HFA mode
Frequency response correction of the CPL function
d&b E12/E12-D Manual 2.1 en
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2.3.1. Controller settings

For acoustic adjustment the functions CUT, HFA and CPL can be
selected.
CUT mode
Set to CUT, the low frequency level is reduced. The cabinet is now
configured for use with actively driven d&b subwoofers.
HFA mode
In HFA mode (High Frequency Attenuation), the HF response of the
system is rolled off. HFA provides a natural, balanced frequency
response when a cabinet is placed close to listeners in near field or
delay use.
High Frequency Attenuation begins gradually at 1 kHz, dropping
by approximately 3 dB at 10 kHz. This roll off mimics the decline
in frequency response experienced when listening to a system from
a distance in a typically reverberant room or auditorium.
CPL function
The CPL (Coupling) function compensates for coupling effects
between the cabinet and close boundary surfaces or when the
cabinet is used as a stage monitor. CPL begins gradually around
1 kHz, with the maximum attenuation below 250 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) and can be set when the system is used in full range mode
without subwoofers.

2.3.2. Operation with E-PAC

Selecting E12 or E12-D mode enables the E-PAC to drive one E12
or E12-D loudspeaker. LO IMP mode configures the E-PAC to drive
a maximum of two E12 or E12-D loudspeakers with a 6 dB
reduction in input level to the loudspeakers.
For acoustic adjustment the CUT and HFA modes are available.
The characteristics are described in the previous section.
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