Ecler MPA4-400 Notice D'emploi page 5

Two bridged amplifiers for two different mono inputs
Now you get a typical stereo amplifier configuration. With a bridged amplifier you obtain
doubled output power with a load of at least 8Ω.
Two bridged amplifiers for a common mono input
The MPA operates now with a single mono signal for two mono amplifiers, each one with its
own volume control
Two bridged amplifiers for two different stereo inputs
You can obtain two zones with independent volume control and two different stereo signals,
but these stereo signals are internally converted to mono in each bridged amplifier
Two bridged amplifiers for 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.
One stereo amplifier and one bridged amplifier for a common stereo input.
Useful for setups where a stereo amplifier drives the mid-range and high frequency speakers
while a second, bridged amplifier drives a subwoofer. This multichannel amplifier features a
low-pass filter to operate on a subwoofer system and a high-pass filter for the mid-range
speakers and tweeters.
3. INSTALLATION
3.1. Placement and mounting
The amplifier is presented as a 2 unit high 19'' rack module. It is supplied with plastic
washers in order not to damage the unit when tightening the screws.
It is important that the amplifier, as a heat source, is not placed next to other equipment nor
exposed to high temperatures.
3.2. Mains connection
The amplifier operates on alternate currents, depending on the country 110-120,
220-240V 50/60 Hz (see characteristics in the back of the unit). The power consumption at
maximum performance is 750VA MPA4-150 / 2550VA MPA4-400. It's important that your
mains installation is adequately scaled to these power demands.
The amplifier should have an earth connection in good conditions (earth resistance,
Rg=30Ω or less). The environment must be dry and dustless. Do not expose the unit to rain or
water splashes, and do not place liquid containers or incandescent objects like candles on top
of the unit. Do not obstruct the ventilation shafts with any kind of material.
In case there is some type of intervention and/or connection-disconnection of the
amplifier, it is most important to previously disconnect the mains power supply. There are no user
or serviceable parts inside the amplifier.
You should avoid that the supply cable twists with the shielded signal cables, as this
could lead to unwanted hum.
In order to protect the unit from an eventual electrical overload or momentary power
peaks from the internal circuits it carries a T 8A fuse (25)*. Should it ever blow up,
unplug the unit from mains and replace it with an identical one. If the new fuse blows
again contact immediately with our Authorized Technical Service. YOU MUST NEVER USE A
HIGHER VALUE FUSE.
* The fuse on the MPA4-400 is internal and should only be manipulated by qualified service
personnel.
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