Ecler SMAC PRO40 Notice D'emploi page 6

Low impedance (200 to 600Ω) monophonic microphones must be used. Shortcircuit pins 1
and 2 of the XLR connector or use a mono jack whenever an UNbalanced connection is desired. An
stereo jack can also be used for UNbalanced connections if the ring is shorted to ground.
CD, magnetophones, cassettes, tuners and video players: they can be connected to the
CD or LINE inputs. All these inputs can handle line level signals, but the SMAC's has dedicated CD
(23) and LINE (24) inputs. The CD input sensitivity is +5dBV (1.778V) and the LINE input sensitivity
is –5dBV (562mV) so that nowadays sound sources requirements are completely fulfilled.
Direct access to the main mix: The SMAC PRO40 mixer have a direct access to the main mix
bus that enables the connection of the mixer to external effect units (see 4.6) or to other mixing units.
4. OPERATION AND USAGE
4.1. Start up
To switch the mixer on just push the switch labeled POWER (21) and the green pilot-light
inside the switch will light up. Although the switching noise produced by the SMAC PRO40 is very low
and almost inexistent when starting up the SMACs with the OUTPUT (19-20) control down, we highly
recommend the "safe power-up sequence": sound sources, mixer, equalizers, active filters and, finally,
power amplifiers. Powering off should be done by following the exact reverse sequence in order to
avoid any possible damage to the loudspeakers.
4.2. Prelistening
The SMACs are equipped with a prelistening system that enables the monitoring of the
different inputs through the VU-meter and the headphones.
The Smac PRO40 has an advanced visual and auditive monitoring system. Two VU-
meters unable simultaneous monitoring of the mix (left VU) and PFL or main OUT (right VU). Audio
monitoring is independent and the headphones can be fed with the PFL signal or both if the SPLIT
function is used. Placing the switch(36) on the SPLIT position will send the MIX signal to the left and
the PFL to the right.
4.3. Channel gain
All the SMAC input channels have accessible input sensitivity GAIN (4) controls. These
controls have the function of compensating for differences of level existing between the sound
sources connected to the table.
The gain controls have a variation margin of ±15dB. All GAIN adjustments must he done
very carefully using the VU-METER as a reference and avoiding that all the red LEDS of the VU-
METER light up, input could be cliped.
4.4. Channel equalization
The 4 SMAC PRO40 channels are provided with a 3-way tone control (5-6-7) of wide
range of operation, ±15dB. This wide range enables a progressive KILL effect instead of the
sharpness of the ISOLATOR switch (15).
6