1. Introdución
This manual provides essential information for the proper installation, operation, and maintenance of your JBL Libra_500 Mixer Amplificador. Lea este manual detidamente antes de usar o produto para garantir un rendemento e unha seguridade óptimos.
1.1 Características principais
- Portable design, suitable for various PA applications.
- Desktop design for either lying flat or keeping upright the unit on a suitable surface.
- Extendable with its preamp/line output for larger applications.
- Overload and low voltage protection for enhanced durability.
- AC and DC Power Supply options for versatile use.
Figura 1.1: Fronte view of the JBL Libra_500 Mixer Amplifier. This image displays the compact and robust design of the amplifier, suitable for various professional audio setups.
2. Información de seguridade
Observe sempre as seguintes precaucións de seguridade para evitar descargas eléctricas, incendios ou danos na unidade.
- Non expoña este aparello á choiva nin á humidade.
- Non bloquee ningunha abertura de ventilación. Instáleo segundo as instrucións do fabricante.
- Non instale preto de fontes de calor como radiadores, rexistros de calor, cociñas ou outros aparellos (incluíndo amplificadores) que producen calor.
- Protexa o cable de alimentación para que non se camiñe nin se aplique, especialmente nos enchufes, nos tomacorrientes e no punto onde saen do aparello.
- Use só anexos/accesorios especificados polo fabricante.
- Remita todo o servizo a persoal de servizo cualificado. O mantemento é necesario cando o aparello sufriu algún dano.
3. Contido do paquete
Verify that all items listed below are included in your package. If any items are missing or damaged, contact your dealer immediately.
- JBL Libra_500 Mixer AmpUnidade lificadora
- Cable de alimentación de CA
- Manual de usuario (este documento)
- Tarxeta de garantía (se procede)
4. Compoñentes e controis do produto
The JBL Libra_500 Mixer Amplifier features a straightforward interface for ease of use in various PA applications. While specific diagrams are not provided, understanding the general layout of mixer amplifiers will be beneficial.
4.1 Controis do panel frontal
- Interruptor de alimentación: Acende ou apaga a unidade.
- Control de volume principal: Axusta o nivel de saída global.
- Input Level Controls: Individual controls for each input channel (if present).
- Tone Controls (Bass): Adjusts the low-frequency response (± 10 dB at 100 Hz).
- Indicadores: Power, signal, and protection status indicators.
4.2 Conexións do panel traseiro
- Entrada de enerxía CA: Connects the supplied AC power cord (240V 50/60 Hz).
- Entrada de alimentación DC: Connects to a 36V DC power source for alternative power.
- Saídas de altofalantes: Barrier strip connections for 4Ω/8Ω and 70V/100V speaker systems. Use 2 x (≥ 16 AWG) cables.
- Entradas de audio: Various input jacks for microphones, line-level devices, etc.
- Preamp/Line Output: For extending the system to larger applications or connecting to external power amplevantadores.
5. Instrucións de configuración
Follow these steps to set up your JBL Libra_500 Mixer Ampmáis vivo.
5.1 Colocación
- Coloca o ampo refrigerador sobre unha superficie estable e plana. Asegúrese de que a ventilación arredor da unidade sexa axeitada.
- Evite colocar a unidade preto de fontes de calor ou baixo a luz solar directa.
5.2 Conectar altofalantes
- Asegurar o ampO activador está apagado e desconectado.
- Connect your speakers to the appropriate barrier strip terminals on the rear panel.
- For low impedance speakers, connect to the 4Ω or 8Ω terminals, matching the speaker impedance.
- For 70V/100V constant voltage systems, connect to the 70V or 100V terminals.
- Use speaker cables of at least 16 AWG for optimal performance and safety.
- Asegúrese de que a polaridade sexa correcta (+ a + e - a -) para todas as conexións dos altofalantes.
5.3 Conexión de fontes de son
- Coa amplifier still off, connect your audio sources (e.g., microphones, CD players, media players) to the input jacks on the rear panel.
- Asegúrese de que todas as conexións estean seguras.
5.4 Conexión de alimentación
- Potencia CA: Connect the supplied AC power cord to the AC power input on the rear panel, then plug it into a suitable 240V 50/60 Hz wall outlet.
- Potencia CC: Alternatively, for DC operation, connect a 36V DC power source to the DC power input terminals. Ensure correct polarity.
6. Instrucións de funcionamento
Unha vez que amplifier is set up, follow these steps for operation.
6.1 Acendido/Apagado
- Antes de acender o dispositivo, asegúrese de que todos os controis de volume estean na posición mínima.
- Press the Power Switch on the front panel to turn the unit on. The power indicator should illuminate.
- To power off, set all volume controls to minimum, then press the Power Switch.
6.2 Axuste do volume
- Start playing audio from your source.
- Gradually increase the individual input level control for the active source.
- Slowly raise the Master Volume control to achieve the desired overall output level.
- Monitor the signal indicators to avoid clipping or distortion.
6.3 Using Tone Controls
- The Bass tone control allows you to adjust the low-frequency response of the audio.
- Turn the Bass knob clockwise to boost low frequencies (up to +10 dB at 100 Hz).
- Turn the Bass knob counter-clockwise to cut low frequencies (down to -10 dB at 100 Hz).
- Adjust to suit your preference and the acoustics of the environment.
7. Mantemento
Proper maintenance ensures the longevity and reliable operation of your ampmáis vivo.
- Limpeza: Disconnect power before cleaning. Use a soft, dry cloth to wipe the exterior. Do not use liquid cleaners or aerosols.
- Ventilación: Regularly check that ventilation openings are clear of dust and debris to prevent overheating.
- Almacenamento: If storing the unit for an extended period, ensure it is powered off, unplugged, and stored in a cool, dry place away from direct sunlight.
8 Solución de problemas
If you encounter issues, refer to the following common problems and solutions before contacting service personnel.
| Problema | Causa posible | Solución |
|---|---|---|
| Sen poder | Cable de alimentación non conectado; Toma de corrente avariada; Interruptor apagado | Check power cord connection; Try a different outlet; Ensure power switch is ON |
| Sen saída de son | Volume controls too low; Speaker connections incorrect; Audio source not playing; Input selected incorrectly | Increase Master and Input volume; Verify speaker wiring and impedance; Check audio source; Select correct input channel |
| Son distorsionado | Input level too high; Speaker impedance mismatch; Faulty cables | Reducir o nivel de entrada; Verificar as coincidencias de impedancia do altofalante amplifier output; Check/replace cables |
| A unidade sobrequenta | Blocked ventilation; Excessive load | Ensure ventilation openings are clear; Reduce output level or speaker load |
9. Especificacións
Detailed technical specifications for the JBL Libra_500 Mixer Ampmáis vivo.
| Número de modelo | Libra_500 |
| Rated Power (AC, 1kHz, 4Ω, THD 10%) | 500 W |
| DC Power Supply Output Power | ≥ 50% rated power |
| Fonte de alimentación (CA) | 240 V 50/60 Hz |
| Fonte de alimentación (CC) | 36 V |
| Resposta en frecuencia | 50-15,000 Hz ± 3dB |
| Relación sinal a ruído | ≥ 70 dB |
| Tone Controls (Bass) | ± 10 dB a 100 Hz |
| Regulamento de saída | ≤ 3 dB, no load to full load at 1kHz |
| Conexións de saída de altofalantes | 4Ω/8Ω & 70V/100V (Barrier Strip, with touch proof cover) |
| Recommended Speaker Cable | 2 x (≥ 16 AWG) Cables |
| Dimensións do produto (LxWxH) | 46.8 x 41 x 46.8 cm |
| Peso do elemento | 22.1 kg |
| Cor | Negro |
| Fabricante | JBL |
10. Garantía e soporte
JBL products are designed for reliability and performance. For specific warranty terms and conditions, please refer to the warranty card included with your product or visit the official JBL websitio.
For technical support, service, or replacement parts, please contact your authorized JBL dealer or visit the JBL support portal online. Ensure you have your product model number (Libra_500) and purchase information available when seeking support.
Fabricante: JBL