PROEL ACRX2 User manual

OWNER’S MANUAL
ACTIVE CROSSOVER
ACRX2

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 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
This unit has been designed to divide audio signal frequencies to be
amplified in two bands sections (low and high) plus subwoofer band.
FEATURES
• Advanced design and manufacturing accuracy.
• Compact dimensions.
• Rack mountable.
• Two-way stereo plus subwoofer crossover, with discrete output levels.
• 30Hz Low Cut for Subwoofer & Low ways.
• Phase inversion switches for High ways.
• Continuously variable crossover frequency in 250Hz e 6kHz range.
• XLR balanced CH1 and CH2 inputs.
• Five unbalanced 6.3mm. (1/4”) TS jacks (two for high frequencies, two
for low frequencies and subwoofer).
• IEC standard AC power supply socket with AC voltage selector and
fuse-holder.

Front panel description
fig.1
1. POWER switch.
2. Low/high crossover frequency controls.
3. Output control levels for low and high sections.
4. Low-cut filters.
5. Phase inversion switches.
6. Subwoofer crossover frequency control.
7. Subwoofer output control level.
8. Subwoofer low-cut filter.
Rear panel description
fig.2
1. Fuse-holder and AC power supply selector.
2. Channel 1 balanced XLR input and unbalanced 6.3mm. (1/4”) jack input
connectors.
3. Channel 1 unbalanced 6.3mm. (1/4”) output connectors – high
frequencies (HIGH OUT1) and low frequencies (LOW OUT1)
4. Channel 2 balanced XLR input and unbalanced 6.3mm. (2/4”) jack input
connectors.
5. Channel 2 unbalanced 6.3mm. (2/4”) output connectors – high
frequencies (HIGH OUT2) and low frequencies (LOW OUT2).

6. Subwoofer unbalanced 6.3mm. (2/4”) output connector.
7. IEC standard AC power supply socket.
Installation
1. Input connections.
• This unit has two independent input channels (CH1 and CH2). Each
channel is supplied with a balanced XLR input as well as an
unbalanced 6,3 mm (1/4”) jack input.
• IEC standard AC power supply socket has a fuse-holder receptacle.
The operating voltage of the unit (110~120 V or 220~240 V)
depends on the way the fuse-holder is inserted in its receptacle.
Further indications are available on fuse-holder (fig.2 ref.1).
Warning: In case of fuse substitution, please use a fuse of the
same type and value and insert the fuse folder in the right
way.

2. Output connections
• HIGH OUT (high frequencies outputs)
- Unbalanced jack outputs to be connected to tweeters amplifier(s).
• LOW OUT (low frequencies outputs)
- Unbalanced jack outputs to be connected to woofers amplifier(s).
• SUB WOOFER (uscita subwoofer)
- Unbalanced jack outputs to be connected to subwoofer amplifier.
Operations
a. To turn on the unit press the POWER switch ON, its led will be lit.
b. To turn off the unit press the POWER switch OFF, its led will be turned
off.
c. In conformity with crossover frequency settings (XOVER FREQ control,
fig.1, ref.2) in 250 Hz - 6 KHz range, input signals are divided in two
ranges: frequencies under the crossover frequency will be present at
LOW OUT (fig.2 ref.3) outputs, and all frequencies higher than
crossover frequency will be present at HIGH OUT (fig.2 ref.3) outputs.
d. SUB, LOW OUT and HIGH OUT sections gain will be settled in an
independent way for each output using SUB GAIN, LOW GAIN e HIGH
GAIN (fig.1 rif.7 e ref.3) controls.

e. The low-cut 30Hz, 12 db/octave slope filter can be activated by pressing
LOW CUT (fig.1 ref.4) switches, independent for both LOW outputs as
well as for SUB output.
f. PHASE (fig.1 ref.5) switches allows to invert signal phase of HIGH OUT
outputs of each channel. It allows to correct audible phase problems
after the output level proper settings.
Warning: in order to avoid any damage to speakers, please turn
down the amplifier volume or turn the amplifier off before inverting
phase.
g. SUBWOOFER XOVER FREQ (fig.1 ref.6) sets subwoofer crossover
frequency in 50Hz - 250Hz range.
Technical specifications
Model ACRX2
Input connectors 2 balanced XLRs - 2 unbalanced 6,3 mm (1/4”) TS
jacks
Output connectors 5 unbalanced 6,3 mm (1/4”) TS jacks
Frequency response 20Hz-25KHz. +/-1dB
Harmonic distortion < 0,05 %
Signal to noise ratio > 95dB
Input impedance 100 K
Output impedance 220
Crossover type 2-way + subwoofer
Crossover ranges Subwoofer/Low frequency: 50-250 Hz
Low/High: 250-6000Hz
Filter type 2
nd
order, 12dB/Octave
Low-cut filter 30Hz, 2
nd
order, 12dB/Octave
Fuse values 95 – 120 VAC: 200mA
210 – 240 VAC: T100mAL
Power supply 115 V AC (± 5%) – 60Hz,
230 V AC (±5%) – 50Hz
Rack height 1U standard 19”
Dimensions (WxHxD) mm 483 x 44 x 194,5 – (19" x 7.9" x 1.75")
Weight 2,9 Kg – 5.5lbs

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
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..

PROEL S.p.A.
(World Headquarters - Factory)
Via alla Ruenia 37/43
64027 Sant’Omero (Te) – Italy
Tel: [phone]
Fax: [phone]
E-mail: [email protected]
installation.proelgroup.com