Ecler MPA6-150, Руководство пользователя

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Low-pass filter ON/OFF switch (23). This switch activates a filter at channel 1 which cuts
out the frequency components above 160 Hz and passes the lower ones.
ATTENTION: Due to the fact that subwoofers require a considerable amount of electrical
power, channel 1 and 2 must be configured in bridged mode. If they are set to stereo-mode, the
system will not work properly, as the filter only affects the output of channel 1.
Combining one bridged amplifier with switched on low-pass filter together with a stereo
amplifier with switched on high-pass filter turns your multichannel power amplifier into an ideal
equipment for clubs and other locations with a subwoofer, mid-range speakers and tweeters.
3.5. Input connections
The signal input connections (42, 43, 44, 45, 46, 47) are electronically balanced XLR-3
sockets, with an input impedance higher than 20k
Ω
and a nominal sensitivity of 0dBV(1V).
Pin assignment:
1. GROUND
2. PHASE (in phase with the output)
3. NON PHASE (inverted phase)
The following diagram shows the connection
of balanced and non-balanced audio sources:
The “STACK OUT” (40, 41) are in parallel with
the inputs and are used to supply the same "IN1 IN2"
input signal to other amplifiers or sound systems. This
signal output connectors are of jack 1/4" type. The pin
assignment is as follows:
HOT or direct signal > Tip
COLD or inverted signal > Ring
GROUND > Body
Some of the connection options for the and the corresponding switch settings are
described later in paragraph 6.2.
Depending on the chosen option, the SP indicators will only light for the active channels.
3.6. Limiter circuit
This system is an always active protection inside the MPA series of amplifiers. The ANTICLIP
circuitry constantly analyses harmonic distortion caused by excessive signal excursion at the power
amplifier's output and automatically reduces the input level in order never to reach distortion.
The great convenience of such a circuit in any kind of installation has to be remarked:
The clear advantage of a limiting system in front of conventional compressors is that the former does
practically not alter the dynamic range, acting only when the distortion threshold is reached.
PHASE GROUND
GROUND
NON PHASE
PHASE
1+3 GROUND
2 PHASE
3 NON PHASE
2 PHASE
1 GROUND
NON PHASE
GROUND PHASE
PHASE
GROUND
BALANCED
UNBALANCED
BALANCED
UNBALANCED