RCF NX S21-A, NX S25-A Owner's Manual
OWNER MANUAL
NX S21-A
NX S25-A
PROFESSIONAL ACTIVE
SUBWOOFERS
LANGUAGE
ENGLISH
ITALIANO
DEUTSCH
3
8
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1. All the precautions, in particular the safety ones, must be read with special attention, as
they provide important information.
SAFETY
PRECAUTIONS
ENGLISH
WARNING: to prevent the risk of fire or electric shock, never expose this product to rain
or humidity.
2. POWER SUPPLY FROM MAINS
The mains voltage is sufficiently high to involve a risk of electrocution; install and a.
connect this product before plugging it in.
Before powering up, make sure that all the connections have been made correctly and b.
the voltage of your mains corresponds to the voltage shown on the rating plate on the
unit, if not, please contact your RCF dealer.
This unit is CLASS I construction, so it must be connected to a MAIN socket outlet with c.
a protective earthing connection.
Protect the power cable from damage; make sure it is positioned in a way that it d.
cannot be stepped on or crushed by objects.
To prevent the risk of electric shock, never open this product: there are no parts inside e.
that the user needs to access.
3. Make sure that no objects or liquids can get into this product, as this may cause a short
circuit.
This apparatus shall not be exposed to dripping or splashing. No objects filled with liquid,
such as vases, shall be placed on this apparatus. No naked sources (such as lighted candles)
should be placed on this apparatus.
4. Never attempt to carry out any operations, modifications or repairs that are not expressly
described in this manual.
Contact your authorized service centre or qualified personnel should any of the following
occur:
The product does not function (or functions in an anomalous way). The power cable has been damaged. Objects or liquids have got in the unit. The product has been subject to a heavy impact. -
WARNING
5. If this product is not used for a long period, disconnect the power cable.
6. If this product begins emitting any strange odours or smoke, switch it off immediately
and disconnect the power cable.
7. Do not connect this product to any equipment or accessories not foreseen.
For suspended installation, only use the dedicated anchoring points and do not try to hang
this product by using elements that are unsuitable or not specific for this purpose. Also
check the suitability of the support surface to which the product is anchored (wall, ceiling,
structure, etc.), and the components used for attachment (screw anchors, screws, brackets
not supplied by RCF etc.), which must guarantee the security of the system / installation
over time, also considering, for example, the mechanical vibrations normally generated by
transducers.
To prevent the risk of falling equipment, do not stack multiple units of this product unless
this possibility is specified in the user manual.
8. RCF S.p.A. strongly recommends this product is only installed by professional
qualified installers (or specialised firms) who can ensure correct installation
and certify it according to the regulations in force.
The entire audio system must comply with the current standards and regulations
regarding electrical systems.
IMPORTANT
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ENGLISH
9. Supports and trolleys
The equipment should be only used on trolleys or supports, where necessary, that are
recommended by the manufacturer. The equipment / support / trolley assembly must be
moved with extreme caution. Sudden stops, excessive pushing force and uneven floors may
cause the assembly to overturn.
10. There are numerous mechanical and electrical factors to be considered when installing
a professional audio system (in addition to those which are strictly acoustic, such as sound
pressure, angles of coverage, frequency response, etc.).
11. Hearing loss
Exposure to high sound levels can cause permanent hearing loss. The acoustic pressure level
that leads to hearing loss is different from person to person and depends on the duration
of exposure. To prevent potentially dangerous exposure to high levels of acoustic pressure,
anyone who is exposed to these levels should use adequate protection devices. When a
transducer capable of producing high sound levels is being used, it is therefore necessary
to wear ear plugs or protective earphones. See the manual technical specifications to know
the maximum sound pressure level.
IMPORTANT NOTES
To prevent the occurrence of noise on line signal cables, use screened cables only and avoid
putting them close to:
Equipment that produces high-intensity electromagnetic fields. Power cables. Loudspeaker lines. -
IMPORTANT NOTES
Place this product far from any heat sources and always ensure an adequate air circulation around it.
Do not overload this product for a long time. Never force the control elements (keys, knobs, etc. ). Do not use solvents, alcohol, benzene or other volatile substances for cleaning the external parts of this product.
IMPORTANT NOTES
Before connecting and using this product, please read this instruction manual carefully and
keep it on hand for future reference. The manual is to be considered an integral part of
this product and must accompany it when it changes ownership as a reference for correct
installation and use as well as for the safety precautions. RCF S.p.A. will not assume any
responsibility for the incorrect installation and / or use of this product.
OPERATING
PRECAUTIONS
IMPORTANT NOTES
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ENGLISH
PRODUCT
INFORMATIONS
The NX Series - a new line of active loudspeakers specifically designed to be the everyday
tool for rental companies and professional musicians. With its ultra compact design and
choice of formats, together with high output levels, NX Series is the answer to a wide
variety of production requirements. The NX is reliable, easy to use and versatile: for every
rental company, musician, venue and audio/visual provider, this highperformance selfpowered speaker system offers a degree of simplicity unmatched by traditional amp and
speaker PA systems.
NX Series is a practical solution for high intelligibility speech and audio applications, covering
infill or delay, production studios, presentations and high power music sound reinforcement
with or without subwoofers. A key requirement for everyday audio systems, delivering
simple ‘plug and play’ solutions, without compromising performance and portability.
Legendary RCF transducer technology coupled with state of the art digital amplification
topology resulting in a perfectly optimised loudspeaker series. The NX Series provides
high end audio coverage even at extreme sound pressure levels, unmatched reliability and
acoustic compatibility across the whole series.
The NX Series offers a wide range of practical mounting hardware, to cover all aspects of
system integration, which assist in the overall simple and effortless system set-up, redefining
the high performance portable PA.
All compression drivers and transducers are precision built taking advantage of RCF’s
superior moulding, assembly technologies and a wealth of professional knowledge and
experience dedicated to achieving extremely high standards.
NX SERIES
TOURING AUDIO SOLUTIONS
COMPONENTS
NX Series Subwoofers are equipped with a new generation of 1000 Watt Digital Amplifiers.
The result of this is very high output, extremely low distortion and an incredible natural
sound.
Each amplifier presents both Stereo XLR/jack (Combo) balanced inputs, XLR output link,
volume and a switchable crossover (80 Hz/110 Hz).
The amplifier features a solid mechanical aluminium structure which not only stabilize the
amplifier during transportation but also assist in the heat dissipation.
All the NX Series amplifiers presents PFC power supply section in order to produce maximum
output even in case of tension drops from main supply.
The NX Series subwoofer cabinets are built in birch plywood and are designed to dampen
down vibrations even at maximum volume settings.
The reflex porting has been resized to offer a better efficiency. The cabinet is equipped with
4 ergonomically designed forged aluminium handles with rubber handgrip.
At the top a rugged steel pole mount has been installed in all models.
AMPLIFIERS
CABINETS
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ENGLISH
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STEREO JACK/FEMALE XLR INPUTS (BAL/UNBAL). The system accept jack or
XLR input connectors.
REAR
PANEL
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LIMITER LED. The amplifier has a built in limiter circuit to prevent clipping of
the amplifiers or overdriving the transducers. When the soft clipping circuit is active
the LED blinks orange. It is okay if the limit LED blinks occasionally. If the LED blinks
frequently or lights continuously, turn down the signal level.
SIGNAL LED. The signal indicator lights green if there is signal present on the
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main XLR input.
STATUS LED. The status indicator flash if the temperature protection is
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active.
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POWER LED. This green led is ON when the speaker is connected to the main
power supply and the ON/OFF is in ON position.
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MALE XLR SIGNAL/XOVER OUTPUT. The output XLR connector provides a
loop trough for speakers daisy chaining (or provides a crossover output when the
crossover switch is pushed).
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VOLUME CONTROL. Adjust the amplifier volume.
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LINK/XOVER OUT SWITCH. The output link is flat when the switch is OFF (the
output signal is the same as the input signal), or is high passed when the switch is
ON (to connect a satellite speaker).
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XOVER SWITCH. This switch sets the crossover frequency of the OUTPUT
SIGNAL at 80 Hz or 120 Hz.
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PHASE SWITCH. This switch reverse the phase of the output signal.
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POWER MAIN SWITCH. The power switch turns the AC power ON and OFF.
NEUTRIK POWERCON AC IN-OUT SOCKET. In-Out AC Powercon Sockets.
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