HFA circuit
-5
0
5
10
-10
-15
-20
-25
-30
20
100
1k
10k
20k
Fig. 4: Frequency response correction of
HFA circuit
In HFA mode (High Frequency Attenuation), the HF response of the E12
system is rolled off. The HFA circuit provides a natural, balanced
frequency response when a unit 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 circuit
Fig. 5: Frequency response correction of
CPL circuit
The CPL (Coupling) circuit compensates for coupling effects when
building closely coupled arrays or when the cabinet is used as a stage
monitor. CPL begins gradually at 1 kHz, with maximum attenuation
below 250 Hz, providing a balanced frequency response when E12
cabinets are used in arrays of two or more. The function of the CPL
circuit is shown in the diagram opposite and can be set in dB
attenuation values between –9 and 0, or a positive CPL value which
creates an adjustable low frequency boost around 65 Hz (0 to +5 dB).
Operation with E-PAC
Selecting E12 or E12-D mode enables the E-PAC to drive one E12
loudspeaker. LO IMP mode configures the E-PAC to drive a maximum
of two E12 loudspeakers with a 6 dB reduction in input level to the
loudspeakers.
For acoustic adjustment the functions CUT and HFA can be selected.
The characteristics of the CUT and HFA settings are explained in the
previous section "Operation with D6 or D12".
E12, E12-D Manual
(1.2 EN)
Page 6 of 10
Summary of Contents for E12
Page 1: ...E12 E12 D Manual 1 2 EN ...
