PROEL FLASH12HDA Notice D'utilisation page 15

GENERAL INFORMATION
Thank you for having chosen a PROEL product.
FLASH12HDA is an active full-range 2-way system featuring high-grade CELESTION transducers and a DSP-controlled
lightweight amplifier module in a sturdy polypropylene cabinet. The transducers employed include a 1" compression
driver with a 1.75" voice coil on a wide constant coverage horn, designed for providing an extended response and low
distortion levels, and a high-power 12" woofer with a 3" voice coil.
The profile of the cabinet allows the use of the enclosure also as a stage monitor, whereas four M10 suspension points
are provided for installation in a variety of positions using the optional accessories available. Two convenient aluminium
handles, plus a third on top of the cabinet, make for easy handling and transportation.
The amplifier module includes a 100 W CLASS AB amplifier for the HF section and a 500 W CLASS D amplifier with SMPS
for the LF section. A built-in DSP section features state-of-the-art signal processing with 40 bit floating point resolution
and 24 bit AD/DA converters, for a superior sonic performance. Advanced functions include full parametric EQ for the
system fine tuning, delay lines for speaker alignment, up to 48 dB/oct. crossover filters, three bands of dynamic EQ,
compressors/limiters for protecting the transducers against distortion and power overloads. 4 different PRESETS (FLAT,
DJ, SPEECH, MONITOR) optimized for using the system in different applications are also available.
INPUT AND CONTROL INSTRUCTIONS (FIG. 1 / 2 / 3)
1. LINE/MIC IN (combo XLR-JACK input)
This is a female combo connector, which accepts a XLR or a JACK plug from almost any type of equipment with a
balanced or unbalanced outputs. The XLR input is wired as follows:
Pin 1 = shield or ground
Pin 2 = + positive or "hot"
Pin 3 = - negative or "cold"
The JACK input is wired as follows:
Tip = + positive or "hot"
Ring = - negative or "cold"
Sleeve = shield or ground
When connecting an unbalanced signal, wire them as follows:
Pin2 / Tip = + positive or "hot"
Pin 1-3 / Sleeve = shield or ground
NOTE: whenever possible, use always balanced cables. Unbalanced lines may also be used but may result in noise over
long cable runs. In any case, avoid using a balanced cable for one channel and an unbalanced one for the other.
2. LINK (XLR output)
This is a male XLR connector, it is connected in parallel with the respective LINE IN input, so the LINK is wired as LINE IN
input. Connect these to the inputs of other powered speakers to make an array.
3. GND LIFT switch
This switch lift the ground of the balanced audio inputs from the earth-ground of the amplifier. If you have HUM noise
problem on one or more loudspeaker try to change the position of these switches (often all up or all down for all the
amplifiers in the system). Please note that to have an effect all cables must be balanced.
4. MIC / LINE switch
This switch adjusts the gain of the LINE/MIC input varying the sensitivity between MIC, suited to connect a microphone,
and LINE, suited to connect a device with high level output like a MIXER, a CD player etc.
NOTE: do not use the MIC sensitivity to "pump up" the volume with the LINE level equipment, in order to avoid the AD
converter saturation that could produce very annoying distortion.
5. LEVEL control
Rotary level control: it attenuates the level of the signal sent to the LINE input. The attenuation ranges from "0" fully
closed (the signal is completely attenuated) to "10" fully open, nominal level (the signal is not attenuated in any way,
so is fed to the internal amplifier at the same level at which it arrives on input).
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