LIBRA 5CT - Speakers FBT - Free user manual and instructions

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FBT LIBRA 5CT - Speakers
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Product type 2-way coaxial suspended loudspeaker
Brand / Model FBT LIBRA 5CT
Frequency response 80 Hz - 20 kHz (-6 dB)
Sensitivity 86 dB (1W/1m)
Dispersion 200° @ 500 Hz; 120° @ 1 kHz; 85° @ 2 kHz; 75° @ 4 kHz; 95° @ 8 kHz
Max SPL 104 dB (1m) / 92 dB (4m)
Recommended amplifier power 120 W RMS
Line transformer 70/100V, power selector 10-64W
Low impedance 15 Ω
Woofer 5" with 1.5" voice coil
Tweeter 1" HF driver with 1" voice coil
Enclosure material ABS
Grille material Aluminium
Net dimensions φ 8.5 × 10.82 in
Net weight 8.81 lb
Input connectors 4-pin Euroblock (In & Thru)
Certification EN54-24:2008 Type B
Operating temperature -25 to +55 °C
Storage temperature -40 to +70 °C
Relative humidity <95%
Color variants Black (45511), White (45483)
Supplied cord 11.48 ft
Maintenance & cleaning Clean with soft dry cloth; inspect suspension periodically
Safety Professional installation; do not expose to rain; use FBT accessories
Repair & spare parts No user-serviceable parts; contact qualified service personnel

Frequently Asked Questions - LIBRA 5CT FBT

What is the recommended amplifier power for the FBT LIBRA 5CT?
The FBT LIBRA 5CT requires a recommended amplifier power of 120 W RMS. For constant voltage systems, the maximum power tap is 64 W on 70/100V lines.
Can the LIBRA 5CT be used in both 70V and 100V installations?
Yes, the LIBRA 5CT is fitted with a line transformer that supports both 70V and 100V constant voltage systems. Use the top selector to match the amplifier voltage and set the desired wattage.
What is the impedance of the LIBRA 5CT in low-impedance mode?
In low-impedance mode, the nominal impedance is 15 Ω. Ensure the amplifier is compatible with this load.
How do I set the power tap on the LIBRA 5CT?
Rotate the selector switch located on the top surface of the speaker to the desired power setting, from 10 W to 64 W. This adjusts the autoformer tapping for 70V or 100V lines.
Can I connect multiple LIBRA 5CT speakers in parallel?
Yes, use the LINK + and LINK - pins on the 4-pin Euroblock connector to daisy-chain speakers. Keep the total power of all speakers within the amplifier's rated output.
Is the LIBRA 5CT certified for fire alarm voice alarm systems?
Yes, the speaker is certified to EN54-24:2008 Type B, making it suitable for voice alarm systems in fire detection and fire alarm installations.
What is the maximum sound pressure level (SPL) of the LIBRA 5CT?
The maximum SPL is 104 dB at 1 meter and 92 dB at 4 meters, ensuring clear audibility in public spaces.
What are the physical dimensions and weight of the LIBRA 5CT?
The net dimensions are 8.5 inches in diameter and 10.82 inches in height. The net weight is 8.81 lb. It comes with a sturdy ABS enclosure.
How should I clean and maintain the LIBRA 5CT?
Use a soft, dry cloth for external cleaning. Avoid water, solvents, and abrasive materials. Periodically inspect suspension cables and mounting hardware for wear. For internal servicing, contact qualified service personnel.
Can the LIBRA 5CT be installed outdoors?
No, the LIBRA 5CT is designed for indoor use. The safety instructions explicitly warn against exposing it to rain or moisture. It is intended for ceiling mounting in covered areas.

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USER MANUAL LIBRA 5CT FBT

EN 54-24:2008 - Type B

CPR & DOP 0068-CPR-212/2024

EN 54-24:2008

Loudspeaker for voice alarm system for fire detection and fire alarm system for building

Declaration of Performance (DoP) available on the website www.fbt.it

PENDANT POINT SOURCE

EN 54-24:2008

EN 54-24:2008 - Type B CPR & DOP 0068-CPR-212/2024

Loudspeaker for voice alarm system for fire detection and fire alarm system for building

Declaration of Performance (DoP) available on the website www.fbt.it

FBT LIBRA 5CT - 1

FBT LIBRA 5CT - 2

FBT LIBRA 5CT - 3

TAPPO SUPERIORE RIMOSSO PER CHIAREZZA
FBT LIBRA 5CT - 4

CONNETTORE EUROBLOCK - 4 POLI

FBT LIBRA 5CT - 5

Componenti

FBT LIBRA 5CT - Componenti - 1

STEP 2b.

FBT LIBRA 5CT - STEP 2b. - 1

STEP 3b.

FBT LIBRA 5CT - STEP 3b. - 1

STEP 6.

1
FBT LIBRA 5CT - STEP 6. - 1

FBT LIBRA 5CT - STEP 6. - 2

FBT LIBRA 5CT - STEP 6. - 3

FBT LIBRA 5CT - STEP 6. - 4

STEP 7.

GENERALE

FBT LIBRA 5CT - STEP 7. - 1

SCANSIONARE PER RICEVERE INFORMAZIONI SUL RICICLO

SI PREGA DI SEGUIRE LE DIRETTIVE DELLA PROPRIA ZONA

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SACCHETTI

Polietilene

Bassa densità

RACCOLTA

PLASTICA

FBT LIBRA 5CT - SACCHETTI - 1

FBT LIBRA 5CT - SACCHETTI - 2

MANUALE

Carta

RACCOLTA

CARTA

FBT LIBRA 5CT - MANUALE - 1

FBT LIBRA 5CT - MANUALE - 2

General informations

FBT LIBRA 5CT - MANUALE - 3

LIBRA 5CT Manual

Versione: 1.1 ita, en | 11/2023 Code: 46790

MADE IN CHINA

Keep this document in a safe palce so that it is available for future reference. We recommend you to regularly check the FBT website for the latest version of this document. When reselling this product hand over this document to the new owner. To use the system properly, always consult the specific guides available on the product pages of the FBT website.

FBT Elettronica SpA - 62019 Recanati (Italy)

www.fbt.it | info@fbt.it

LIBRA

5CT

SAFETY PRECAUTIONS 20

Important safety instructions....20

GENERAL FEATURES ...... 21

Description 21

Specifications....21

DIMENSIONS....22

INPUTS & OUTPUTS....23

CONNECTIONS....24

Constant voltage systems....24

Low impedance systems ....24

INSTALLATION MODE 25

Ceiling installation steps....26

Concrete ceiling installation steps 28

TECHNICAL SPECIFICATIONS 32

WASTE & DISPOSAL....33

Product specifications....33

Packing specifications....33

FBT LIBRA 5CT - WASTE &amp; DISPOSAL....33 - 1

WARNING

RISK OF ELECTRIC SHOCK DO NOT OPEN

FBT LIBRA 5CT - WARNING - 1

TO REDUCE THE RISK OF ELECTRIC SHOCK DO NOT REMOVE COVER (OR BACK) NO USER SERVICEABLE PARTS INSIDE REFER SERVICING TO QUALIFIED SERVICE PERSONNEL. TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE.

FBT LIBRA 5CT - WARNING - 2

This product conforms to applicable EU directive requirements.

FBT LIBRA 5CT - WARNING - 3

This product conforms to all applicable Electromagnetic Compatibly Regulations 2016 and all other applicable UK regulations.

All informations included in this operating manual have been scrupulously controlled; however FBT is not responsible for eventual mistakes. FBT Elettronica SpA has the right to amed products and specifications without notice.

Important safety instructions

FBT LIBRA 5CT - Important safety instructions - 1

  • Loudspeaker lines (amplifier outputs) can have a sufficiently high voltage (i.e. 100V) to involve a risk of electrocution; never install or connect this loudspeaker when the line is alive.
  • Make sure all connections have been made correctly and the loudspeaker input voltage (in a constant voltage system) or its impedance is suitable for the amplifier output.
  • Protect loudspeaker lines from damage; make sure they are positioned in a way that they cannot be stepped on or crushed by objects.
  • To prevent inductive effects from causing hum, noise and a bad system working, loudspeaker lines should not be laid together with other electric cables (mains), microphone or line level signal cables connected to amplifier inputs.
  • 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.
  • Also check the suitability of the support surface to which the product is anchored (wall, ceiling, structure, etc.) and the components used for attachment (screws, screw anchors, etc.).
  • Use only the optional devices / accessories specified by the manufacturer.
  • Never use the handles, brackets or other elements of the module to directly suspend the modules or the system.

This manual contains important about the correct and safe use of the device. 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. FBT SpA will not assume any responsibility for the incorrect installation and/or use of this product.

Description

The new FBT LIBRA suspended loudspeakers is an ideal solution for projects where the closed ceilings do not permit the use of embedded ceiling mounted loudspeakers. Its atypical design impresses thanks to its essential and clean lines. In terms of its sound, FBT LIBRA 5CT is irresistible for its excellent reproduction quality and sound fidelity, both in the rendering of speech and in the reproduction of high quality stereo recordings. The loudspeaker will no longer have to be an element to be hidden risking compromising the quality of the sound, but it becomes an integrated element in the environment, where the result is the union between form and function, between total disappearance and acoustics.

Following nature itself, where sound expands in all directions, a speaker has been developed that manages to reproduce a natural sound sensation. FBT LIBRA 5CT is of two way design incorporating a 5" coaxial low frequency woofer and 1" high frequency driver. FBT LIBRA 5CT incorporate a switchable transformer with power selector from 10W to 64W and low impedance connection (15Ω). FBT LIBRA 5CT is an excellent audio system at all frequencies for background music in small areas, diffusion in halls, public areas, boutiques, shops, passageways, galleries, museums, etc.

Specifications

  • 2 - way coaxial
  • 5" LF woofer with 1.5" voice coil
  • 1" HF driver with 1" voice coil
    • 120W RMS recommended amplifier
  • 70/100V line transformer with power selector from 10W to 64W and 15Ohm
    • Sturdy ABS molded enclosures
    • 11.48ft supplied cord
  • Euroblock "In & thru" connectors
    • EN54-24 certification - Type B
    • Available in black (45511) and white (45483)

FBT LIBRA 5CT - Specifications - 1

EN 54-24:2008

EN 54-24:2008 - Type B CPR & DOP 0068-CPR-212/2024

Loudspeaker for voice alarm system for fire detection and fire alarm system for building

Declaration of Performance (DoP) available on the website www.fbt.it

FBT LIBRA 5CT - Specifications - 2

FBT LIBRA 5CT - Specifications - 3

FBT LIBRA 5CT - Specifications - 4

TOP CAP REMOVED FOR CLARITY
FBT LIBRA 5CT - Specifications - 5

EUROBLOCK CONNECTOR - 4 PIN

FBT LIBRA 5CT - Specifications - 6

Euroblock connector

FBT LIBRA 5CT - Euroblock connector - 1

LIBRA 5CT is equipped with a 4-pin Euroblock connector. Connect the positive wire (amplifier “+” output) to the pin “INPUT +” of the 4-pin EUROBLOCK connector. Connect the negative wire (amplifier “-” output) to the pin “INPUT -” of the 4-pin Euroblock connector. The “LINK +” and “LINK -” pins are useful to link another loudspeaker in parallel. The impedance value of each loudspeaker is 15Ω.

LIBRA 5CT is equipped with a line transformer, therefore the power amplifier must be equipped with constant voltage outputs at 100V or 70V. The input voltage of the loudspeaker must correspond to the output voltage of the amplifier and the sum of the nominal powers of all the loudspeakers connected to the line must not be higher than that of the amplifier. Before making the connections, adjust the input voltage and output power using the appropriate selector.

Warning

FBT LIBRA 5CT - Warning - 1

  • The loudspeaker line shall be short (for long distances, it may be necessary to use cables with large cross-section wires).
  • Always use cables having wires with an adequate cross-section, considering the cable lenght and the total loudspeaker power.
  • Loudspeaker lines must be kept separated from the mains cables, microphone cables or others, in order to avoid inductive phenomena may cause hum or noises.
  • Use loudspeaker cables with twisted wires to reduce hum caused by inductive effects due to coupling with electromagnetic fields.
  • Do NOT connect the low impedance input directly to 70/100V constant voltage lines.

WARNING | Connect the cable, for the emergency system, to a junction box containing ceramic terminal and thermal fuse; as per fire regulations.

Constant voltage systems

This connection system requires that each speaker be equipped with a dedicated line transformer. The amplifier must have steady voltage outputs of 100V or 70V. Should it be necessary, the loudspeakers connected in parallel to the output of the amplifier allow you to extend the installation from any of the previously installed speakers, and also to remove the loudspeakers when no longer needed.

When making the connections, you have to observe the "phase" of speaker connection to its own transformer and also that of the parallel connection of the speakers. The input voltage of the speaker must match the output voltage of the amplifier; the total rating power of all speakers connected to the line must not be greater than that of the amplifier.

Low impedance systems

This connection system are generally used in the presence of lines with a small number of loudspeakers of a certain power placed at the minimum distance from the amplifier. The connection between the loudspeakers will be a mixed series/parallel, in such a way as to reduce the overall impedance of the loudspeakers to a non-critical value for the amplifier. A low impedance connection requires that the total impedance of the speakers be equal to or greater than that of the amplifier. The sum of the loudspeaker powers must be adequate for the maximum power that can be supplied by the amplifier.

Ex. The impedance of a single speaker is 16Ω ; parallel connection of two loudspeakers results in a total impedance of 8Ω (impedance = 16/number of loudspeakers).

FBT LIBRA 5CT - Low impedance systems - 1

FBT LIBRA 5CT - Low impedance systems - 2

FBT LIBRA 5CT - Low impedance systems - 3

IMPEDENZA TOTALE 8 OHM

FBT LIBRA 5CT - Low impedance systems - 4

Components

  1. Sheet metal plate - ceiling fixing
  2. Dome ceiling
  3. Cable
  4. Top cover
  5. Cable gland
  6. Screws for watertight closere
  7. Selector
  8. Carabiner for suspension cable
  9. Cabiner for safety cable
  10. Euroblock connector In & thru
  11. Libra 5CT shell

Warning

FBT LIBRA 5CT - Warning - 1

LIBRA 5CT sound speakers must be installed using the flying accessories described in this manual and following the special assembly instructions by qualified staff only, strictly complying with the current regulations and safety standards in force in the country of installation.

  • FBT flying accessories are manufactured for their exclusive use with LIBRA 5CT systems and have not been designed for being used with any other speaker or device.
  • FBT flying accessories are manufactured for their exclusive use with LIBRA 5CT systems and have not been designed for being used with any other speaker or device.
  • The flying accessories in use are to be coupled and secured safety to both the sound speaker and the ceiling (or the other support).
  • When components are fitted to ceilings, floors or beams, always make sure that all couplers and fixing elements are properly sized and have an adequate load capacity.

Special attention was paid to the selection of materials and the manufacturing so as to permit high safety levels. The staff in charge of hanging the array system must be skilled and qualified; the installer/user will be responsible of ascertaining limits and lifting procedures for the structures to which the array will be attached. An improper use of the array suspension system may cause major damage to persons and things.

WARNING | FBT ELETTRONICA SpA accepts no responsibility for any damage to people or objects if these instructions are not complied with or if the safety factor of all elements related to system suspension are not properly checked.

WARNING | The LIBRA speakers use only with FBT mount for wall installation. Use with other mounts is capable of resulting in instability causing possible injury.

STEP 1a.

Ceiling Installation

Secure the metal plate to the suspended ceiling using the provided screws. Insert the cables into the hole of the bracket

FBT LIBRA 5CT - Ceiling Installation - 1

STEP 2a.

Ceiling Installation

Insert the cables (suspension and safety) into the appropriate cable clamp and wrap them around the support structure (e.g., beam); secure the cable using the cable clamp.

FBT LIBRA 5CT - Ceiling Installation - 1

STEP 3a.

Ceiling Installation

Pull the free end of the suspension and safety cables to adjust the diffuser to the desired height.

STEP 4a.

Ceiling Installation

Reattach the ceiling panel and cover the hole with the dome by securing it onto the metal plate.

FBT LIBRA 5CT - Ceiling Installation - 1

⚠ WARNING | Wrap and secure the safety cable on a separate or adjacent support structure to the suspension cable.

STEP 1b.

Concrete Installation

Attach the suspension cable to the metal plate using the cable clamp.

FBT LIBRA 5CT - Concrete Installation - 1

FBT LIBRA 5CT - Concrete Installation - 2

FBT LIBRA 5CT - Concrete Installation - 3

STEP 2b.

Concrete Installation

Insert the wall anchor with a ring (optional) into the hole of the metal plate and secure the safety cable.

FBT LIBRA 5CT - Concrete Installation - 1

FBT LIBRA 5CT - Concrete Installation - 2

FBT LIBRA 5CT - Concrete Installation - 3

STEP 3b.

Concrete Installation

Secure the metal plate to the concrete structure using the (optional) screws and cover it with the ceiling dome.

STEP 4b.

Concrete Installation

Cover the metal plate with the ceiling dome.

FBT LIBRA 5CT - Concrete Installation - 1

STEP 5.

Using the carabiner, fix the suspension cable in the central hole. Fix the safety cable in one adjacent hole of the support.

FBT LIBRA 5CT - STEP 5. - 1

FBT LIBRA 5CT - STEP 5. - 2

STEP 6.

Remove the EUROBLOCK connector, wire the connector and reinsert the connector into the loudspeaker.

FBT LIBRA 5CT - STEP 6. - 1

1
FBT LIBRA 5CT - STEP 6. - 2

FBT LIBRA 5CT - STEP 6. - 3

FBT LIBRA 5CT - STEP 6. - 4

FBT LIBRA 5CT - STEP 6. - 5

STEP 7.

Rotate the selector to select the appropriate power tap setting on the top surface of the speaker.

FBT LIBRA 5CT - STEP 7. - 1

STEP 8.

Close the back of the diffuser with the practical protective cap. Insert the screws supplied for watertight closure to the top of the speaker.

FBT LIBRA 5CT - STEP 8. - 1

GENERAL

Color codeBlack45511
White45483
Configurationway2 coaxial
Low frequency wooferinch5 - 1.5 coil
High frequency driverinch1 - 1 coil
Line transformerV / W70 - 100 / 64
Operating / storage temperature°C-25 to +55 / -40 to +70
Relative humidity<95%

ACOUSTIC SPECIFICATIONS

Frequency response (@-6dB)Hz80 - 20k
Sensitivity (@1W/1m) (bi-amp LF/HF)dB86
Dispersion (@-6dB)Narrow = Wide setting500Hz200°
1kHz120°
2kHz85°
4kHz75°
8kHz95°
MAX SPL (1m/4m)dB104 / 92
Recommended HP filterHz - db oct.70 - 24

INPUTS & OUTPUTS

Input connectors4-pin Euroblock in & thru

AMPLIFIER

Recommended amplifierW RMS120
Rated noise power 100hrs (voltage)W (V)64 (31)
Nominal impedanceOhm15
Nominal impedance 100V LINEOhm (W)156 - (64)
312 - (32)
625 - (16)
1000 - (10)
Nominal impedance 70V LINEOhm (W)76 - (64)

MECHANICAL SPECIFICATIONS

MaterialCabinetABS
GrilleAluminium
Net dimensions (WxHxD)inch φ 8.5 × 10.82
Transport dimensions (WxHxD)inch 12 × 13.58 × 12
Net weightlb8.81
Transport weightlb11.90

Product specifications

FBT LIBRA 5CT - Product specifications - 1

Packing specifications

FBT LIBRA 5CT - Packing specifications - 1

Where affixed on the equipment or package, the barred waste bin sign indicates that the product must be separated from other waste at the end of its working life for disposal. At the end of use, the user must deliver the product to a suitable recycling centre or return it to the dealer when purchasing a new product. Adequate disposal

of the decommissioned equipment for recycling, treatment and environmentally compatible disposal contributes in preventing potentially negative effects on the environment and health and promotes the reuse and/or recycling of equipment materials. Abusive product disposal by the user is punishable by law with administrative sanctions.

FBT LIBRA 5CT - Packing specifications - 2

BOX

Corrugated Cardboard

PAPER DISPOSAL

FBT LIBRA 5CT - BOX - 1

PROTECTIONS

Thermoformed Cellulose

PAPER DISPOSAL

FBT LIBRA 5CT - PROTECTIONS - 1

FBT LIBRA 5CT - PROTECTIONS - 2

Check the instructions of your municipality. Separate the components and disposal them properly.

AVOID RELEASE TO THE ENVIROMENT

FBT LIBRA 5CT - AVOID RELEASE TO THE ENVIROMENT - 1

SCAN FOR RECYCLING INFO

PLEASE FOLLOW YOUR AREA DISPOSITION

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BAGS

Low-density Polyethylene

PLASTIC DISPOSAL

FBT LIBRA 5CT - BAGS - 1

FBT LIBRA 5CT - BAGS - 2

MANUAL

Paper

PAPER DISPOSAL

FBT LIBRA 5CT - MANUAL - 1

FBT

FBT ELETTRONICA SPA

Via Paolo Soprani 1 - 62019 RECANATI - Italy

Tel.071750591 - Fax.071 7505920

email: info@fbt.it - www.fbt.it

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Product information

Brand : FBT

Model : LIBRA 5CT

Category : Speakers