JBL Professional JRX218S 18-Inch Passive Subwoofer Instruction Manual

1. Introduktion

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.

Bild 1: Framsidan view of the JBL Professional JRX218S 18-Inch Passive Subwoofer.

2. Viktig säkerhetsinformation

• Läs instruktionerna: Spara dessa instruktioner för framtida referens.
• Observera varningar: Följ alla varningar på produkten och i bruksanvisningen.
• Vatten och fukt: Använd inte denna apparat nära vatten.
• Rengöring: Rengör endast med en torr trasa.
• Ventilation: Blockera inte några ventilationsöppningar. Installera enligt tillverkarens anvisningar.
• Värme: Installera inte nära några värmekällor som radiatorer, värmeregister, spisar eller andra apparater (inklusive amplyftare) som producerar värme.
• Nätsladdskydd: Skydda nätsladden från att trampas på eller klämmas, särskilt vid kontakter, bekvämlighetsuttag och den punkt där den kommer ut från apparaten.
• Tillbehör: Använd endast tillbehör/tillbehör som specificerats av tillverkaren.
• Montering: Använd endast med den vagn, stativ, stativ, fäste eller bord som specificerats av tillverkaren eller som säljs tillsammans med apparaten. När en vagn används, var försiktig när du flyttar kombinationen vagn/apparat för att undvika skador på grund av att den välter.
• Underhåll: Överlåt all service till kvalificerad servicepersonal. Service krävs när apparaten har skadats på något sätt, till exempel nätsladden eller kontakten är skadad, vätska har spillts eller föremål har fallit in i apparaten, apparaten har utsatts för regn eller fukt, inte fungerar normalt , eller har tappats.

3. Vad finns i lådan

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

• JBL Professional JRX218S 18-Inch Passive Subwoofer
• Användarmanual (detta dokument)

Om något saknas eller är skadat, kontakta din återförsäljare omedelbart.

4. Installationsguide

4.1 Placering

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 Anslutningar

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.

Figure 2: Rear panel showing SpeakON input connectors.

4.3 Stolpemontering

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.

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

5. Bruksanvisning

5.1 Krafthantering

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 Systemintegration

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. Underhåll

6.1 Rengöring

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. Felsökning

8. Tekniska specifikationer

Figure 4: Dimensions of the JRX218S subwoofer.

9. Garanti och support

9.1 Garantiinformation

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 webwebbplatsen för detaljerade villkor. Spara ditt inköpsbevis för garantianspråk.

9.2 Kundsupport

For technical assistance, service, or further inquiries, please contact JBL Professional customer support. Contact details can typically be found on the official JBL webplats eller i produktförpackningen.