User manual

M2 (4.0E)
Controls and indicators
M2 Controller Modul
M2 Controller,
CA-COM connector plate
Frequency responce LFC-Funktion (min. and
max.)
10
100 1k 10k
6
5
4
3
2
1
0
-1
-2
-3
-4
-5
-6
FREE
PAIR
M2
M2-CO Controls and indicators
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. M2 is now configured for use with d&b C7-SUB active
subwoofer.
LFC level control
The detented
L
ow
F
requency
C
oupling control adjusts the systems
lo- and lo-mid response to different operating environments of the
M2 system.
The
FLOOR
position is the standard setting for a single M2, used
as floor monitor.
Turning the control to the
PAIR
position, the lo- and lower mid
frequency range is more and more reduced (Corner frequency
about 600Hz). The maximum left position fully compensates the
different coupling behaviour of the low and high frequencies when
two cabinets are used in a paired monitor application.
Turning towards
FREE
increases the systems low end for operation
without floor coupling (e.g. flown).
Indicators
These indicators give a three stage indication of the M2 Controller
signal levels.
−
ISP
(
I
nput
S
ignal
P
resent, green) illuminates when the signal
presented to the controller input exceeds a

36 dBu threshold
value. The ISP circuit is unaffected by the setting of the
controller mute switch and level control.
−
GR (G
ain
R
eduction, yellow) illuminates when the controller
limiter reduces gain by more than 3 dB.
−
OV
(
Ov
erload red) illuminates when the controller limiter
reduces gain by more than 12 dB or overload occurs in the
signal path (input signal too high) or when the amplifier gain is
reduced because the output current is too high (e.g. due to a
short circuit).
The limiter indicators show the stage of the HF and LF channels
independently.
Level Control
The detented level control adjusts the controller input sensitivity. It
has a 20 dB range (14 dB ... +6 dB) calibrated in 1 dB steps. The
controls are normally set to 0 dB.
Connector
The M2 controller incorporates one CA-COM 8 pin output for
driving one or two (linked) M2 loudspeakers. Different from the
F-series controller, the M2 controller uses female connectors for
protection against contact.
The M2 cabinet incorporates two CA-COM (male/female)
connectors for easy linking of two cabinets.