PROEL ACDT90 User manual
INSTRUCTION MANUAL
PA Combo Amplifier
ACDT90
1. IMPORTANT SAFETY INSTRUCTIONS
CAUTION: To reduce the risk of electric shock do not remove cover (or back panel). No
user serviceable parts inside. Refer servicing to qualified personnel only.
WARNING: To reduce the risk of fire or electric shock, do not expose this apparatus to
rain or moisture.
This symbol is intended to alert the user of the presence of uninsulated
dangerous voltage within the product enclosure that may be of sufficient
magnitude to constitute a risk of electric shock to persons.
This symbol is intended to alert the user of the presence of important operating
and maintenance (servicing) instruction in the literature accompanying the
appliance. Please carefully read the owner’s manual.
INSTRUCTIONS:
All safety and operating instructions should be read before the product is operated.
Retain these instructions:
All safety and operating instructions should be retained for future reference.
This owner’s manual should be considered as a part of the product and it must accompany it
every time, and delivered to the new user when this product is sold. In this way the new owner will
be aware of all the installations, operating and safety instructions.
Heed all warnings:
All warnings on the product and in owner’s manual should be adhered to.
Heed all warnings.
Follow all instructions:
All operating and user’s instructions must be followed.
Sentences preceded by symbol contain important safety instruction. Please read it carefully.
DETAILED SAFETY INSTRUCTIONS.
Water and moisture:
This apparatus should not be used near water (i.e. bathtub, kitchen sink, swimming pools,
etc.)
Ventilation:
This apparatus should be placed in a position that doesn’t interfere with correct ventilation.
This unit, for example, should not be placed on a bed, sofa cover o similar surfaces that could
cover ventilation openings, or placed in a built-in installation, such a bookcase or a cabinet
that could block air flow trough ventilation openings.
Heat:
This apparatus should be placed away from heat sources, like radiators, heat registers, stoves
or other products (including amplifiers) that produce heat.
Power sources:
• This apparatus should be connected only to power source type specified in this owner’s
manual or on the unit.
• If the supplied AC power cable plug is different from the wall socket, please contact an
electrician to change the AC power plug.
Grounding or Polarization:
• All precautions must be observed in order to avoid grounding or polarization defeating.
• Unit metal parts are grounded through the AC power cord.
• If the AC power outlet doesn’t have grounding, consult an electrician for outlet grounding.
Power cord protection:
The power cord should be routed in a way it will not be walked on or pinched by items placed
upon or against it, paying particular attention to cords at plugs, convenience receptacles and
wall outlet.
Cleaning:
• You can clean the unit with a compressed air flow or a wet cloth.
• Don’t clean the unit using solvents like trichloroethylene, thinners, alcohol, or other fluids
with very strong volatility and flammability.
Non use periods:
The unit AC power cord should be unplugged from the outlet if it’s unused for a long period.
Objects or liquid entry inside the unit:
Be careful that no objects fall or liquid is spilled inside the unit through ventilation openings.
Safe power line use:
• Keep firmly the plug and the wall outlet while disconnecting the unit from AC power.
• If the unit will not be used for a long period of time, please unplug the power cord from AC
power outlet.
• In order to avoid unit power cord damages, please don’t strain the AC power cable and
don’t bundle it.
• In order to avoid unit power cord damages, please be sure that the power cord is not
walked on or pinched by heavy objects.
Unit relocation:
Before any unit relocation please control the unit is turned off. The power cord must be
unplugged by the wall outlet, and all the connections wires should be disconnected as well.
Don’t open this unit:
Don’t attempt to open or to repair this unit by yourself. For any problem solution not described
in this owner’s manual, please refer to qualified personnel only or consult us or your National
Distributor. Any improper operation could result in fire or electric shock.
Damages requiring services:
• Don’t attempt to do operations not described in this user’s manual.
• In the following cases please refer to an authorized maintenance center or skilled
personnel:
- When the unit works improperly or it doesn’t work at all.
- If power cord or plug are damaged.
- If liquid has spilled, or objects have fallen into the unit.
- The unit has been exposed to rain.
- The unit doesn’t operate normally or it exhibits a marked change in performance.
- If the product has dropped or it has been damaged in any way.
Maintenance:
The user shouldn’t attempt maintenance operation not described in this user’s manual. Every
maintenance operation should be done by qualified personnel only.
IMPORTANT SAFETY INSTRUCTIONS:
• Install this unit following owner’s manual instructions.
• Don’t install, connect or disconnect power supply when the unit is powered, otherwise
there’s an high risk of electric shock.
• Don’t open the unit, there are no user serviceable parts inside.
• If you detect a particular smell from the unit, please immediately turn it off and disconnect
the AC power cord.
• Don’t block the unit ventilation openings.
• Avoid using this unit in overload for a long period.
• Don’t force commands (switches, controls, etc.)
• To obtain good speakers wire contacts, please tighten the screw terminals firmly.
• For safety reason, don’t defeat the grounding connection. Grounding is useful for user
safety.
• Use only manufacturers suggested connectors and accessories.
• This unit should be placed in a rack (see INSTALLATION) and kept far from:
Wet places
Direct exposure to heat sources (like sun light)
Non properly ventilated places
• Disconnect the power cord during storms or when the unit is not used.
• In order to prevent fire and electric shock risks, it’s necessary to keep the unit far
from sprinkling and drops. Please don’t put cups, vases or other object containing liquids
over the unit. In case of interferences from source signal, THD value will raise over 10%.
Don’t place this unit in a bookshelf o in other places with small room.
• PROEL S.P.A. is not responsible for any damage that occurs due to a wrong unit
installation.
Thank you for choosing one of Proel products, and for your confidence towards
our brand, synonymous of professionalism, accuracy, high quality and reliability.
All our products are CE approved and designed for continuous use in
professional installation systems.
2. DESCRIPTION
This unit is designed for speech, music, paging and sound reinforcement
applications.
FEATURES
• State-of-the-art design and manufacturing accuracy.
• Wide frequency response: 50 Hz – 18KHz.
• Low distortion and low noise level.
• Digital AM FM tuner, with 5 memories for each band, and CD
player sections built-in. Each section has its own independent
power switch and volume control.
• Bass and Treble tone controls.
• LED level indicator.
• Two unbalanced microphone inputs, for dynamic microphones,
and one unbalanced switchable Microphone/Aux input.
• Four outputs – one constant impedance outputs (4Ω) – three
constant voltage outputs (25 V, 70 V, and 100 V).
• 24 V DC emergency power.
• Protection circuits.
3. FRONT PANEL DESCRIPTION
fig.1
1. Power On/Off switch.
2. Overload LED.
3. Output LED meter.
4. Unbalanced 1/4” jack (MIC1 and MIC2).
5. Unbalanced Microphone/Aux 1/4” jack.
6. MIC1, MIC2, MIC3/AUX volume controls.
7. MIC3/AUX switch.
8. Siren On/Off switch.
9. Tone controls (BASS and TREBLE).
10. CD player section.
11. Digital tuner section.
4. REAR PANEL DESCRIPTION
fig.2
12.IEC AC power socket.
13.AC type T 1,6 AL 250 V fuse-holder.
14.DC type T 10 AL 250 V fuse-holder.
15.Emergency DC power switch (24 V DC).
16.24V DC emergency power terminal.
17.Speakers output for constant impedance/constant voltage.
18.Grounding terminal.
19.AM loop antenna.
20.FM antenna connector.
5. INSTALLATION
1. 24V DC emergency power connection (generator or battery).
• Use terminals # 16 of fig. 2.
• In case of AC power fault or black out, the unit will be powered by 24
V DC, with automatic and silent switchover to backup power.
Note: to activate this feature switch # 15 of fig. 2 must be set to ON
position.
• We inform our customers that if DC power supply is supplied by a
battery, the unit won’t be able to recharge the battery.
• When the amplifiers is powered by 24 V DC, amplifier nominal power
will be reduced by 20%.
2. Input connections
• MICROPHONE CONNECTION:
Despite the kind of microphones you’re using, please always use a
shielded wire.
Please see the following drawings for details about the different
wirings:
Balanced low impedance microphone:
Unbalanced low impedance microphone:
AUX balanced and unbalanced connections.
3. Output connections
Attention
To prevent the risk of electric shock, never touch amplifier outputs
when the amplifier is turned on.
To access to the speaker connection terminals (fig. 2 ref. 17) remove
the protection cover unscrewing the screws.
This unit can be used both with constant impedance speakers (4 Ω) and
constant voltage speakers (25V, 70V, and 100V).
CONSTANT IMPEDANCE LINE
To use this amplifier with a constant impedance line (4Ω), please
connect the COM terminal to the negative post of your speaker, and
connect the 4Ωterminal to the positive post COM (fig. 2 ref. 17).
• To obtain the best performances, total speakers impedance
connected to the line, should be equal to the amplifier output
impedance.
• The speakers power sum should not be lower than the amplifier
output power.
• We suggest you don’t use long cables. Anyhow, for longer
distances application use a thicker cable.
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