d&b audiotechnik E0, Руководство пользователя

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Operation with D12
IMPORTANT!
Selecting E0 mode in the D12 enables up to four E0 cabinets to be
driven by each channel.
Controller settings
For acoustic adjustment the functions CUT, HFA and CPL can be
selected.
CUT circuit
Set to CUT, a high pass filter with a 120 Hz cut off frequency is inserted
in the controller signal path. The E0 is now configured for use with d&b
active subwoofers.
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 E0
system is rolled off. The HFA 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 between the
cabinets when building closely coupled arrays. CPL begins gradually at 1
kHz, with maximum attenuation below 400 Hz, providing a balanced
frequency response when Q7 cabinets are used in arrays of two or
more. The function of the CPL circuit in the D12 amplifier 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 E0 mode in the E-PAC enables up to two E0 cabinets to be
driven at full output power. LO IMP mode allows the E-PAC to drive a
maximum of four E0 cabinets with a 6 dB reduction of input level to the
loudspeakers.
The CUT and HFA settings are available. The characteristics of the CUT
and HFA settings are explained under the previous section "Operation
with D12 - Controller settings".
E0 Manual (3.0E) Page 5 of 10