JBL JRX218S

JBL Professional JRX218S 18-Inch Passive Subwoofer Instruction Manual

Model: JRX218S

1. Introducción

This manual provides essential information for the proper setup, operation, and maintenance of your JBL Professional JRX218S 18-Inch Passive Subwoofer. Please read this manual thoroughly before using the product to ensure optimal performance and safety. The JRX218S is designed to deliver powerful low-frequency sound for various professional audio applications.

JBL Professional JRX218S 18-Inch Passive Subwoofer front view

Figura 1: Frente view of the JBL Professional JRX218S 18-Inch Passive Subwoofer.

2. Información importante de seguridad

  • Leer instrucciones: Conserve estas instrucciones para futuras consultas.
  • Preste atención a las advertencias: Siga todas las advertencias en el producto y en las instrucciones de funcionamiento.
  • Agua y humedad: No utilice este aparato cerca del agua.
  • Limpieza: Limpiar únicamente con un paño seco.
  • Ventilación: No obstruya las aberturas de ventilación. Instale el producto según las instrucciones del fabricante.
  • Calor: No lo instale cerca de fuentes de calor como radiadores, rejillas de calefacción, estufas u otros aparatos (incluidos ampificadores) que producen calor.
  • Protección del cable de alimentación: Proteja el cable de alimentación para que no sea pisado ni aplastado, especialmente en los enchufes, receptáculos y en el punto donde sale del aparato.
  • Accesorios: Utilice únicamente accesorios especificados por el fabricante.
  • Montaje: Utilice únicamente el carrito, el soporte, el trípode, el soporte o la mesa especificados por el fabricante o vendidos con el aparato. Cuando utilice un carrito, tenga cuidado al mover la combinación carrito/aparato para evitar lesiones por vuelco.
  • Servicio: Encargue todas las tareas de mantenimiento a personal técnico cualificado. Se requiere realizar el mantenimiento cuando el aparato haya sufrido algún daño, como por ejemplo si el cable de alimentación o el enchufe están dañados, si se ha derramado líquido o han caído objetos en el interior del aparato, si el aparato ha estado expuesto a la lluvia o la humedad, si no funciona con normalidad o si se ha caído.

3. ¿Qué hay en la caja?

Upon opening the packaging, verify that all components are present and in good condition:

  • JBL Professional JRX218S 18-Inch Passive Subwoofer
  • Manual de usuario (este documento)

Si falta algún elemento o está dañado, comuníquese con su distribuidor de inmediato.

4. Guía de configuración

4.1 Colocación

For optimal bass response, place the JRX218S subwoofer on a stable, flat surface. Corner placement can often enhance bass output, but experiment with different positions to find the best sound for your environment. Ensure adequate space around the unit for proper ventilation.

4.2 Conexiones

The JRX218S is a passive subwoofer and requires an external amplifier. Connect your amplifier's output to one of the SpeakON inputs on the rear panel of the subwoofer. The two SpeakON inputs are wired in parallel, allowing for easy daisy-chaining to another passive speaker or subwoofer. Ensure your amplifier can safely drive a 4-ohm load.

JBL Professional JRX218S 18-Inch Passive Subwoofer rear panel with SpeakON inputs

Figure 2: Rear panel showing SpeakON input connectors.

4.3 Montaje en poste

The subwoofer features a top-mounted, cast aluminum 35 mm pole mount receptacle. This allows you to mount a mid/high speaker cabinet directly above the subwoofer using an optional SS3BK pole (sold separately), creating a compact and integrated full-range sound system. Ensure the pole and mounted speaker are stable and secure.

JBL Professional JRX218S 18-Inch Passive Subwoofer with a pole-mounted speaker

Figure 3: JRX218S with an optional pole-mounted speaker (speaker and pole not included).

5. Instrucciones de funcionamiento

5.1 Manejo de energía

The JRX218S has a continuous power handling capacity of 350 Watts and a peak power handling of 1400 Watts. It is crucial to match your amplifier's output to these specifications to prevent damage to the subwoofer. Overpowering or underpowering can lead to poor performance or component failure.

5.2 Impedance and Frequency Response

The subwoofer operates at an impedance of 4 ohms. Its frequency range is 34Hz-250Hz (-10dB), with a frequency response of 53Hz-250Hz (±3dB). This range is optimized for deep bass reproduction.

5.3 Integración del sistema

When integrating the JRX218S into a larger PA system, use an external crossover to send only low-frequency signals to the subwoofer. This ensures efficient operation and prevents the subwoofer from attempting to reproduce frequencies outside its optimal range, which can lead to distortion and reduced performance.

6. Mantenimiento

6.1 Limpieza

To maintain the appearance and performance of your subwoofer, regularly wipe the exterior with a soft, dry cloth. Avoid using abrasive cleaners, solvents, or excessive moisture, as these can damage the carpet covering and internal components.

6.2 Enclosure and Grille

The rugged enclosure is constructed from 19 mm (.75 in) Medium Density Fiberboard (MDF) and covered in black carpet. The 18-gauge perforated steel grille protects the speaker components. Inspect these periodically for any signs of damage. Minor scuffs on the carpet can often be brushed out. Do not attempt to remove the grille unless you are qualified service personnel.

7. Solución de problemas

ProblemaPosible causaSolución
Sin salida de sonido
  • Cableado incorrecto o conexiones sueltas.
  • AmpEl alificador no está encendido o está defectuoso.
  • Crossover settings incorrect (no low frequencies sent).
  • Check all SpeakON connections between ampamplificador y subwoofer.
  • Verificar ampPotencia y funcionalidad del elevador.
  • Ensure your audio processor or mixer is sending low-frequency signals to the subwoofer output.
Sonido distorsionado
  • Overdriving the subwoofer (too much power).
  • Amprecorte más duradero.
  • Frecuencia de cruce incorrecta.
  • Reduce input level to the ampamplificador o subwoofer.
  • Controlar amplifier gain settings; ensure it's not clipping.
  • Adjust crossover to send only appropriate low frequencies to the subwoofer.
Weak or Insufficient Bass
  • Subwoofer phase issue.
  • Colocación incorrecta.
  • Amplifier not powerful enough.
  • Si tu amplifier or processor has a phase switch, try inverting the phase.
  • Experiment with different subwoofer placements (e.g., closer to a wall or corner).
  • Asegúrese de que su amplifier provides sufficient power for the subwoofer's continuous rating.

8. Especificaciones técnicas

CaracterísticaDetalle
ModeloJRX218S
Tipo de altavozSubwoofer pasivo
Diámetro del woofer18 pulgadas
Power Handling (Continuous/Peak)350 W / 1400 W
Impedancia4 ohmios
Rango de frecuencia (-10dB)34Hz - 250Hz
Respuesta de frecuencia (± 3dB)53Hz - 250Hz
SPL pico máximoNivel de presión sonora de 133 dB
Conectividad2 x SpeakON NL-4 (parallel)
Material del recinto19 mm (.75 in) MDF with black carpet covering
Reja18-gauge perforated steel
Montaje de posteTop-mounted, cast aluminum 35 mm receptacle
Dimensiones (alto x ancho x profundidad)23.5" x 20.3" x 22" (597 mm x 516 mm x 559 mm)
Peso71 libras (32.5 kg)
JBL Professional JRX218S 18-Inch Passive Subwoofer dimensions diagram

Figure 4: Dimensions of the JRX218S subwoofer.

9. Garantía y soporte

9.1 Información de garantía

The JBL Professional JRX218S 18-Inch Passive Subwoofer comes with a manufacturer's limited warranty. Please refer to the warranty card included with your product or visit the official JBL Professional webSitio para conocer los términos y condiciones detallados. Conserve su comprobante de compra para reclamaciones de garantía.

9.2 Atención al cliente

For technical assistance, service, or further inquiries, please contact JBL Professional customer support. Contact details can typically be found on the official JBL websitio o en el embalaje del producto.

© 2024 JBL Professional. Todos los derechos reservados.

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