Operation And Usage; Start Up; Prelistening; Channel Gain - Ecler SMAC PRO30 Manual De Instrucciones

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 PRO30 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 PRO30 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.
Pressing any of the PFL (Pre Fader Listening) switches (9), the signal(s) present at the
input(s) will be heard on the headphones (16), seen on the VU-meter (2).
If the PFL lever switches are at the OFF position, then the signal present at the main MIX
bus (before the last amplification step, OUTPUT), the Mix led (35) shines. If one or more PFL
switches are on, the PFL led (18) will shine and the signal(s) present on the prelistening will be
monitored.

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 ±20dB. 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 3 SMAC PRO30 channels are provided with a 3-way tone control (5-6-7) of wide
range of operation, -30 to +10dB for bass and treble and –25 to +10dB for medium. This wide range
enables a progressive KILL effect instead of the sharpness of the ISOLATOR switch (15).
4.5.- Removeable / Exchangeable module (Faders, Crossfader with VCA, PUNCH, SHAPE)
The addition of the Voltage Controlled Amplification (VCA) control to the fineness,
precision and mechanical strength of the crossfader has resulted in an operating life greater than
300.000 operations. That means that the SMAC crossfader operating life is 30 times greater than a
high quality mechanical crossfader.
Once the operating life of the crossfader, SHAPE, PUNCH switches or faders has ended,
they can be easily changed proceeding as follows:
6