User manual

E3 (1.1E)
IMPORTANT!
Frequency response correction of HFA circuit
-5
0
5
10
-10
-15
-20
-25
-30
20
100 1k 10k 20k
E3
CUT
GRISP
MUTE
OVL
-12 dB
-6 +6
0
HFA
Controls on E3
controller module
Connector wiring
Passive
Crossover
1+
1–
2+
2–
1+
1–
2+
2–
Connections
The E3 cabinet is fitted with a pair of Speakon-NL4 connectors. All
four pins of both connectors are wired in parallel. The E3 uses the
pin assignments 1+/1–. Pins 2+/2– are designated to active d&b
subwoofers. Using one connector as the input, the second
connector allows for direct connection to additional loudspeakers.
The connector plate is fitted to the E3 rear panel. Next to it, on
the left hand side panel, is a metal blank plate with the cabinet
details and serial number. The connector and blank plates can be
swapped over to allow mounting brackets to be fitted to the back
panel of the cabinet or to allow it to be placed on its back as a
stage monitor.
The plates are removed by undoing the four 2.5 mm hex head
screws securing each panel. The connector wiring is disconnected
in order to swap the panels. Make sure when reconnecting the
wiring that the red wire goes to pin 1+ and the black wire to pin
1
– on the Speakon connector board.
Operation with P1200A
Up to four E3 loudspeakers can be driven by each P1200A power
amplifier channel. Fitting one E3-CO and one subwoofer controller
module allows a single mainframe to drive four E3 and two active
subwoofer cabinets (E18-SUB or C7-SUB). All cabinets can be
linked together locally and fed by a single four-wire cable from
either mainframe output connector.
E3 controller module switches
CUT switch and indicator
Set to CUT, a high pass filter with a 110 Hz cut-off frequency is
inserted in the controller signal path. The yellow CUT LED
illuminates. The E3 system is now configured for use with d&b C or
E-Series active subwoofers.
HFA switch and indicator
In HFA mode (High Frequency Attenuation), the HF response of the
E3 system is rolled off. The yellow HFA LED illuminates. The HFA
circuit configures the E3 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.