Montarbo MP4 Manuel D'instructions page 13

Control and connection panel
Each channel is fitted with:
1
GAIN: adjust the gain (sensitivity) of the line and mic inputs,
➤
allowing connections of signal sources (both line and mic level)
having a wide range of signal level. As a practical rule, the GAIN
control must be set to the maximum allowable level that will not
activate the peak level indicator.
2
HIGH / MID / BASS: 3-band equalizer, allow you to achieve the
➤
desired tonal blend.
•
HIGH: adjusts the amount of boost or cut in the high frequency
range. Turning the control clockwise increases the amount of high
frequencies, counter-clockwise decreases it, in the middle position
there will be no alteration.
•
MID: adjusts the amount of boost or cut in the mid frequencies
range. Turning the control clockwise increases the amount of high
frequencies, counter-clockwise decreases it, in the middle position
there will be no alteration.
•
BASS: adjusts the amount of boost or cut in the low frequency
range. Turning the control clockwise increases the amount of low
frequencies, counter-clockwise decreases it, in the middle position
there will be no alteration.
3 EFF: effect send volume (post fader and post tone controls).
➤
It adjusts the quantity of the built-in effect that is sent to the
channel signal.
Note: on the channels where you don't want to have the internal effect turn
this knob fully anticlockwise.
4
Channel VOLUME control: adjusts the channel's level in the
➤
output mix.
connections:
●
5 MIC/LINE - channel 1: mic (balanced) / line input with Neutrik
➤
Combo ® receptacle (allowing use of either XLR and Jack connector),
for connection of dynamic microphones.
6 MIC/LINE - channels 2-3-4: unbalanced mic / line inputs with
➤
jack connectors, for dynamic microphones and instruments.
Master section:
7 MASTER volume control: adjusts the total power output
➤
of the amplifier.
8 EFF SELECT: pushbutton for the selection of the built-in effect
➤
(Reverb or Chorus).
With the pushbutton up you will obtain a 'CHORUS' effect.
It produces a warm and rich sound and it is ideal to enliven a guitar
or keyboards accompainment and to 'fatten' a voice.
With the pushbutton pushed you will obtain a 'REVERB' effect.
it is ideal for the voice and for general purposes.
9 EFF. VOL.: built-in effect volume control.
➤
10 AUX OUT VOL: auxiliary output level control. It is independent
➤
from the master volume setting.
The trademark Neutrik Combo is property of Neutrik
®
All manuals and user guides at all-guides.com
●
11
external effects devices (such as equalizers, echo units, flangers,
phasers etc..) to be connected to the unit. Use mono jack plugs.
• the SEND (PRE-OUT) socket is connected to the preamplifier output
signal (dependent of the master volume control). When a jack is
plugged into this socket, the power amplifier is not disconnected
from the preamplifier, enabling thus to take the signal out while
using the amplifier normally.
• the RETURN (MAIN-IN) socket is connected to the internal
power amplifier input. When a jack is plugged into this socket, the
internal connection between preamplifier and power amplifier is
interrupted. The preamplifier output signal is still available at the
SEND (PRE-OUT) socket.
❚ When using an external device connect the SEND socket to the
input of the external effect unit and the output of the external
effect unit to the RETURN socket.
SEND ➔ Effect input
Effect output ➔ RETURN
Note: when an external effect device is connected to these sockets,
the internal effect unit is not disconnected.
Should the internal effect not be desired, turn the EFF. VOL control
(9) to the '0' setting. The external effect affects all channels.

12
jack socket will allow to switch the internal effect 'on' and 'off'
remotely.
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output is the mix of the output levels of the single channels;
the signal sent to the AUX output is exactly the same sent to the
master with the only difference that the AUX output (not amplified)
has its own volume control (AUX OUT VOL) which is independent
from the position of the master volume control; this allows to make
two fully independent level adjustments. The aux output can be
used for sending the signal to a second sound system (power amp,
self-powered speakers) or to a mixer.

14
Rear panel
15
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.
16
connections:
SEND (PRE-OUT ) and RETURN (MAIN-IN) sockets: they allow
➤
See page 35.
EFFECT F.SWITCH: a standard footswitch connected to this
➤
AUX OUT: Auxiliary output. The signal appearing at the AUX
➤
See pages 35 - 36.
PHONES: jack socket for stereo headphones.
➤
Mains power cord socket (with built-in fuse). Use only the
➤
Mains POWER on/off switch.
➤
MP4
keyboards combo
13
ENGLISH