Montarbo NM250A Manuel D'instructions page 9

NM250A
2-way, bi-amplifed, active loudspeaker system
Control and connection panel
4 3
1 MIC: balanced input, with adjustable sensitivity (microphone
-40dBu / 2kOhms or line -10dBu / 20kOhm), fitted with a Neutrik
Combo ® connector which accepts both 3 pin XLR and jack plugs.
 See 'connectors' and 'connections' at pages 25 and 26,
and 'applications at pages 27, 28 and 29.
2 LINE/MIC: input sensitivity switch (mic when pushed in).
The switch is factory set in the 'line' position (button up) for the
most common applications (connection to a mixer or to other
active systems). If you want to connect a microphone directly to the
input you must push the button to 'mic' (as input and output of the
NM250A are connected in parallel and carry the same signal,
should the output be connected to another NM250A the line/mic
switch of the latter should also be set in the same way of the other).
3 LINK: balanced output, (in parallel with the input), using a 3
pin XLR connector. It allows for easy parallel connection of other
NM250A or active systems.
 See 'connectors' and 'connections' at pages 25 and 26,
and 'applications at pages 27, 28 and 29.
4 Peak led indicator. The PEAK indicator is of great help to get
an idea of the output level:
- if it never blinks, this means that the system is still below its
power limits.
- occasional blinking of this LED indicates that the working condition
is near to the maximum level, yet the musician's experienced ear still
continues to be the best judge of the signal quality.
The trademark Neutrik Combo ® is property of Neutrik
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5 VOL: it is the master volume control.
Adjusts the input levels of the 2 built-in power amplifiers to adapt
them to the output level of the mixer. It also allows to adjust the
speaker volume when this system is used in parallel with others.
Typical operating setting is on maximum position (sensitivity -10dBu).
When a microphone is connected to the input this control must be
adjusted to reach the desired volume.
6 HIGH / LOW: 2-band equalizer. It allows changing the response
curve of the system depending on the requirements of each
different application. This enables optimizing the NM250A's
working condition for each specific requirement whether it is
used for example in a conference hall, on stage for monitoring
and many other situations.
Note: to obtain a flat response it is advisable to set both the
HIGH and the LOW controls to their mid settings.
7 POWER /0 - I: Mains power on/off switch.
8 Mains power cord socket (with built-in fuse).
Use only the factory supplied mains cable or a suitable cable with
a ground connection and marked with the safety approvals valid
in the country of use.
When installing make sure that it is easy to get to this connector
and to the mains plug.
7
8
fuse replacement
Service fuse
Spare fuse
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ENGLISH