User manual

Connectors Panel
Mains AC Input Supply Connector
Mains AC Output Supply Connector
Power LED
XLR Input Connectors
XLR Parallel Out Connectors
Operation Mode Switch
(C
.
onnections and Controls)
.
The connectors are on the rear or side panel of the Loudspeakers. The layout of connectors panel is
slightly different depending on MB Loudspeaker’s model. Please refer to specific layout for model(s)
you are using, which you can find on page 7.
MB Series Loudspeakers
This connector provides
MB Loudspeaker
accept input audio signal. Nominal input level is +4dBu. 12K
impedance electronically balanced. See Figure on page 5 for wiring scheme.
SubWoofer models MB 12.0 and MB 18.0 are provided with stereo input (Left and Right). Signals are
internally mixed to mono. This is usefull to setup systems consisting of stereo Full Range section and
mono SubWoofer section.
Note that Parallel Out (Left and Right) provides anyway Full Range stereo signal to drive other
systems.
When only one input is used on SubWoofer (e.g. Left input), then connecting Parallel Out Left to Right
Input drives +6dB signal into the SubWoofer. In general it is always recommended to drive both Left
and Right inputs on MB SubWoofers with identical signals, instead of driving one single input with
+6dB higher signal.
are
This switch configures internal processor to drive the system in mode or mode
().
In Full Range mode internal processor provides extended low frequency responce within the widest
Models MB 8.1, MB 12.1, MB 15.2, MB 12.2W, MB MAV-2W
W
Full-Range Crossover
HP
[1]
[2]
[3]
[4]
[5]
[6]
use a PowerCon 3-pole AC
mains connector for their power inlet (see Figure on page 5). It is important to determine and use
adequate wire gauge for mains cable considering the voltage drop that occurs across the cable’s
resistance. This is a function of the gauge and the length of the conductors, the current drawn by the load
and the startingAC mains voltage.
Internal fuse is provided on mains circuit, which will only blow in the event of major fault condition. In
case you suspect it is blown, refer to your dealer for service arrangement. Do not try to operate the unit.
Grounding-Shielding circuit is organized in the way that signal ground (XRL Pin1) and mains ground
are permanently connected together at one single point (internally). This reduces the risk of hum due to
ground loops when balanced audio equipments are properly connected in a chain.
output for mains line to link
other loudspeakers. The number of loudspeakers linked to each other must not exceed the main line
current capcity, and cable used should have adequate cross section. Anyway the total current of the
chain, including all systems connected, must not exceed the current rate of a single PowerCon (20A
maximum).
intended for the purpose of daisy-chaining multiple powered
Loudspeakers together on a common signal feed. Input and Parallel Out connectors are hard-wired in
parallel. Take care to check that the signal source is capable of driving the total impedance resulting
when paralleling the group of powered loudspeakers. As a practical rule use the following formula for
MB Loudspeakers:
12.000 [ ]
Maximum number of parallel Powered MB Loudspeakers =
(Source Impedance [ ] x 10)
W
W
(blue) lights when is connected to mains supply and internal DC is
available.
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