Installation; Placement, Mounting, Cooling; Mains Connection; Input Signal Connections - Ecler essentials eLPA Série Notice D'emploi

3. INSTALLATION

3.1. Placement, mounting, cooling

All eLPA amplifier models are presented in standard 19" rack format and are 2 units high.
It is important that the amplifier, as a heat source, is not placed next to other equipment nor exposed to
high temperatures. Therefore, the ventilation path should be kept free to allow fresh air entering the forced
ventilation tunnel. This system takes air from the unit's backside, bringing it directly to the power amp modules and
distributing it to the transformer and capacitors and then obliging it to pass through the cooling tunnel to finally blow
out of the front panel. In case of rack mounting, this system avoids heat accumulation inside the unit and thus
increases lifetime of electrolytic capacitors. It is recommended to place power amplifiers on top of other equipment
and not underneath.

3.2. Mains connection

eLPA2-650, 2-950 and 2-1400 models are powered by alternating current through their universal power
supply: 90-264 V and 47 - 63 Hz. eLPA2-350is supplied with alternating current at 230 V, 47 / 63 Hz. All models
include fuses to protect against possible overloads. In order to protect the power amplifier from eventual power
consumption overloads it is protected by a set of internal fuses. Should a fuse blow, it must be replaced
immediately by one with identical rating. Should it blow again please contact our Technical Service Department.
NEVER REPLACE THE FUSE WITH ANOTHER ONE WITH A HIGHER VALUE.
The mains cables must not be near the shielded cables carrying the audio signal, as this could cause
humming.

3.3. Input signal connections

The input connectors for the balanced signal are of the XLR-3 and ¼" JACK type (11, 13). The assignment is
as follows:
Hot or direct signal
Cold or phase inverted signal
Ground
For an unbalanced connection, short pin 3 to ground (XLR) or the ring to ground (Jack).
The input impedance in balanced mode is 20kΩ (10kΩ
several amplifiers without losing audio quality. Input sensitivity can be selected via a switch placed on the back
panel (14) Selectable values are 26, 32dB

3.4. Cut filter or crossover

The integrated cut filter has the function of dividing the input signal into two frequency bands. When it is
activated, channel 1 receives and amplifies the frequency band between 20 Hz and 150 Hz, whereas channel 2 does
the same for the frequency band between 150 Hz and 20 kHz. The slope of the cut filter between the two bands, at
150Hz, is 18 dB / octave.
This function is useful for connecting a two-way loudspeaker system to a single eLPA2-350 amplifier. If the
playback is in stereo, then it will be necessary to use one eLPA amplifier for the left signal and another one for the
right signal, whereby each LPA amplifier operates with the low frequencies in channel 1 and the high frequencies in
channel 2.
4
XLR-3
> Pin 2
> Pin 3
> Pin 1
non-balanced). This impedance makes possible to parallel
JACK
Tip
Ring
Sleeve