Important Remark; Introduction - Ecler MPA4-150R Bedienungsanleitung

1. IMPORTANT REMARK

Congratulations! You are the owner of a carefully designed and manufactured equipment. We
thank you for having purchased our MPA R power amplifier.
It is VERY IMPORTANT that you read this manual before connecting the amplifier in order to
obtain its maximum performance.
We recommend our authorised Technical Services whenever any maintenance task should be
needed so that optimum operation shall be achieved.
MPA R series amplifiers come with a 3-year warranty.

2. INTRODUCTION

The main features of the MPA4-150R / MPA6-150R multichannel amplifier are:
•
Four / six independent channels of amplification, with line-level balanced input.
• Independent "REMOTE" control on each input channel to control the level of the
corresponding signal through, for example, a remote potentiometer. (ECLER accessories are
recommended for this use). Any other device which generates a DC voltage from 0 to 10V can
be used to adjust the input signal level. It is also possible to use relays or any dry contact to
create a remote "MUTE" function for any of the input channels. This allows the user to remotely
and independently fix the attenuation/MUTE of the input signal, which will be send to the
amplifier selected with the switches on the rear panel of the unit.
A single potentiometer (o control signal) can be used for more than one or even all input
channels if suitable wiring is used (see detailed information in section 4.4.).
•
"STACK" connectors on "INPUT 1, INPUT 2" for sending the signals to other amplifiers or sound
systems.
•
Operating modes:
The MPA4-150R amplifier station consists of four 182W/4Ω amplifiers and the MPA6-150R
amplifier station consists of six 200W/4Ω amplifiers. These channels can be configured through a set
of switches found on the rear panel. This allows multiple amplification setups useful in many
situations, for example:
o Four / six independent mono amplifiers, each one amplifying the mono signal of its own input.
o Four / six mono amplifiers with a common mono input.
The amplifier operates now with just one input signal for all amplifiers, but preserves the
ability to control each channels volume independently. This setup is useful when distributing
signals to different zones.
o Four / six mono amplifiers with a common stereo input.
This setup is similar to the previous example but the input is now a stereo signal. The
amplifier adds both stereo channels together converting them into a mono signal.
o Two / three stereo amplifiers for two / three different stereo inputs.
Each stereo channel offers a dedicated volume control. Useful for addressing two / three
zones with two / three different stereo signals.
o Two / three stereo amplifiers for one common stereo input.
This setup is similar to the previous example but the input is now a single stereo signal which
is fed to two / three amplifiers.
o Two / three bridged amplifiers for two/three mono signals or stereo signals summed to
different mono signals.
With each pair of bridged channels you obtain doubled output power with a load of at least
8Ω.
o Two / three bridged amplifiers for a mono signal or a stereo signal summed to a common
mono signal.
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