User manual

E9 Data Sheet E9
Frequency response correction of HFA circuit
(only available with E-PAC)
E9 isobar diagram
The E-PAC can drive a single E9 cabinet at an output power of
300 watts. LO IMP mode allows the E-PAC to drive two E9 cabinets
with a 6 dB reduction of input level to the speakers.
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.