User manual

E9 Data Sheet E9
Frequency response correction of HFA circuit
(only available with E-PAC)
-5
0
5
10
-10
-15
-20
-25
-30
20
100 1k 10k 20k
E9 isobar diagram
DIP switches 1 and 2 respectively allow CUT and HFA settings to be
selected. The characteristics of the CUT setting are explained on
the previious page under the section "E9 controller module
switches".
The functions BX and SUB are not available with the E-PAC
controller.
HFA setting
In HFA mode (High Frequency Attenuation), the HF response of the
E9 system is rolled off. The HFA circuit configures the E9
loudspeakers to provide 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.
Dispersion characteristics
The diagrams below show dispersion angle vs frequency plotted
using lines of equal sound pressure (isobars) at -6 dB and -12 dB.
The nominal 90° horizontal dispersion is maintained from 20 kHz
down to 900 Hz.