PROEL APW1000 User manual

INSTRUCTION MANUAL
APW1000 / 2000 / 3000
Power Amplifiers

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 installation, 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 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 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 you’re not going to use the unit for a long period of time, please unplug the power cord
from AC power outlet.
• To avoid unit power cord damaging, please don’t strain the AC power cable and don’t
bundle it.
• In order to avoid unit power cord damaging, 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 o 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 turn it off immediately 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 connectors and accessories suggested by the manufacturer. .
• 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.
DESCRIPTION
APW series amplifier has been specifically designed for paging, music, and
sound reinforcement applications in P.A. systems.
FEATURES:
• Balanced XLR inputs.
• Balanced 6.3mm (1/4”) jack inputs.
• Three Speak-on discrete output connectors for CHANNEL A,
CHANNEL B and BRIDGED mono speaker.
• Output signal (SIG) LED indicator.
• Output overload (OL) LED indicator.
• 30Hz subsonic filter to avoid speaker damage by unwanted and
dangerous subsonic frequencies.
• CLIP LIMIT switch to allow output signal limiting to protect
loudspeakers from the effects of clipping.
• AMP MODE three way selector to choose amplifier operating
mode among MONO, STEREO and BRIDGED. In STEREO mode
the amps works in a “standard” way with both levels and both
outputs working. In MONO mode only Left channel input level
works, setting the levels for both amp Speak-on outputs
(CHANNEL A & CHANNEL B). In BRIDGED mode only Left
channel input level works, setting the level for BRIDGED Speak-on
output.
• Three Speak-on output connectors for professional and reliable
amplifier to speaker connection, named CHANNEL A, CHANNEL
A, and BRIDGED. Please note that BRIDGED output must be used
with AMP MODE BRIDGED selection only, while CHANNEL A and
CHANNEL B outputs should be used both in MONO mode both
STEREO mode.
• In order to reset the amp operation in case of uneven operation
there’s a resettable BREAKER circuit. If this circuit breaks
continuously there’s a serious problem, like speaker real load
impedance lower than 2-Ohm in mono or stereo or lower than 4-
Ohm in bridge, or the circuit is detecting an amplifier malfunction.

FRONT PANEL DESCRIPTION
fig.1
1) Power switch and power LED.
2) A & B level controls.
3) SIG LED (Signal LED) – these LEDs indicate that a signal is present
after the level controls.
4) OL LED (Overload LED) – these LEDs turn on when the output of
the amplifier reaches its maximum. It’s OK if this LED blinks
occasionally, but if it blinks continuously or frequently, please turn
down the source signal or the level controls.

REAR PANEL DESCRIPTION
fig.2
1) XLR & 6.3mm. (1/4” TRS) jack, balanced linked inputs.
2) 30Hz sub-sonic filter.
3) CLIP LIMITER circuit on/off switch.
4) AMP MODE selector:
MONO – Input A only is active and its signal is routed to both
amplifier stages. The level control of channel A sets the output
level for CHANNEL A & CHANNEL B Speakon outputs.
STEREO - Two independent amplification paths, input A is output
on CHANNEL A Speakon, while input B is output on CHANNEL B
Speakon.
BRIDGED - Input A only is active and its signal is routed to both
amplifier stages, linked in a “bridged” way (in order to supply more
power, the powered signal of both amplification section is
summed). The level control of channel A sets the output level for
BRIDGED Speakon output.
5) Three Speak-on output connectors for CHANNEL A, CHANNEL B
and BRIDGED. Please note that BRIDGED output must be used with
AMP MODE BRIDGED selection only, while CHANNEL A and
CHANNEL B outputs should be used both in MONO mode both
STEREO mode.
6) BREAKER circuit reset switch is available only in the 220VAC
version.
115 VAC version traditional fuse.

7) Mains AC IEC standard power input.
TECHNICAL SPECIFICATIONS
Model APW 1000 APW 2000 APW 3000
480x2 @ 2Ω800x2 @ 2Ω1400x2 @ 2Ω
300x2 @ 4Ω450x2 @ 4Ω750x2 @ 4Ω
Output RMS Power in
Watts – MONO or
STEREO modes 205x2 @ 8Ω310x2 @ 8Ω575x2 @ 8Ω
300x2 @ 4Ω450x2 @ 4Ω750x2 @ 4ΩOutput RMS Power in
Watts - BRIDGED mode 205x2 @ 8Ω310x2 @ 8Ω575x2 @ 8Ω
Input connectors Balanced XLR & 6.3mm (1/4”) TRS jack -
unbalanced connection by 6.3mm (1/4”) TS jack
Input impedances 20-kOhm balanced
10-kOhm unbalanced
Frequency response 25Hz – 25KHz (+0, -1dB)
Output connectors
Speak-on connectors wired:
1+ (hot) & 1- (cold) for Stereo and Mono modes
1+ (hot) & 2+ (cold) for BRIDGED mode
THD & SMPTE IMD <0.03% @ 8Ω
Signal to noise ratio >100dB below rated power @4Ω
Sensitivity 1.15V (+3.4dBu @ 4Ω)
AC power 115 V AC or 230 V AC
Dimensions (WxDxH) 483x400x89 mm. - 19.0x15.7x3.5 in
Weight 19.8Kg – 43.6
lbs
22Kg – 48.5 lbs 25.5Kg – 56.2 lbs

This unit complies with CE Directive 89/336/CEE (Electromagnetic compatibility)
and following modifications 92/31/CEE e 93/68/CEE, by European Specifications:
EN 50082-1:1997, EN 55013:1990, EN 55020:1994
This unit complies with CE Directive 73/23/CEE (Low Voltage)
and following modifications 93/68/CEE, by European Specifications:
EN 60065:1998
Disclaimer
Proel SpA pursue a policy of continuous research and development. Proel SpA reserve the right to modify
p
roduct circuitry and appearance at any moment, without prior notice.