Ecler MPA6-150, User Manual

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1. IMPORTANT REMARK
Congratulations! You are the owner of a carefully designed and manufactured equipment.
We thank you for having purchased our MPA6-150 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.
2. INTRODUCTION
This multichannel power amplifier has been designed using the same technology as the
PAM amplification series. With this technology, ECLER introduced a new concept to the world of
professional audio: The use of switching field effect transistors. The SPM-Technology (Switching
Power Mosfet) has been developed and patented by ECLER S.A. The use of these parts for audio
applications represents a firm and spectacular enhancement comparing to conventional amplifiers.
These advantages can be outlined as follows:
a) Lower internal resistance than bipolar transistors, which leads to less heating of the
amplifier and more powerful and controllable bass.
Conventional Mosfets have a 4 to 7 times bigger internal resistance than switching
Mosfets.
b) The extremely high speed of these devices gives a transparency to the upper
frequencies till now only achieved by tube amplifiers. This fact also reduces TIM (transitory
intermodulation) to very low levels.
The MPA6-150 amplifier station consists of six 147W/4
Ω
amplifiers which can be
configured through a set of switches found on the rear panel. This allows multiple amplification
setups useful in many situations, for example:
Six mono amplifiers for six different mono inputs.
When setup this way, the MPA is able to amplify six different audio signals, each one having a
dedicated volume control.
Six mono amplifiers for one common mono input.
The amplifier operates now with just one input signal for all amplifiers, but preserves the ability to
control each channel volume independently. This setup is useful when distributing signals to different
zones.
Six mono amplifiers for one 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.
Three stereo amplifiers for three different stereo inputs.
Each stereo channel offers a dedicated volume control. Useful for addressing three zones with three
different stereo signals.
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 all three amplifiers.