JBL Professional JRX218S 18-Inch Passive Subwoofer Instruction Manual

1. Pengenalan

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.

Rajah 1: Depan view of the JBL Professional JRX218S 18-Inch Passive Subwoofer.

2. Maklumat Keselamatan Penting

• Baca Arahan: Kekalkan arahan ini untuk rujukan masa hadapan.
• Perhatikan Amaran: Ikut semua amaran pada produk dan dalam arahan pengendalian.
• Air dan Kelembapan: Jangan gunakan alat ini berhampiran air.
• Pembersihan: Bersihkan hanya dengan kain kering.
• Pengudaraan: Jangan sekat sebarang bukaan pengudaraan. Pasang mengikut arahan pengilang.
• haba: Jangan pasang berhampiran mana-mana sumber haba seperti radiator, daftar haba, dapur, atau radas lain (termasuk amppenghidup) yang menghasilkan haba.
• Perlindungan Kabel Kuasa: Lindungi kord kuasa daripada berjalan atau tersepit, terutamanya pada palam, bekas kemudahan dan tempat keluar dari radas.
• Aksesori: Gunakan hanya lampiran/aksesori yang ditentukan oleh pengilang.
• Pemasangan: Gunakan hanya dengan troli, dirian, tripod, pendakap atau meja yang ditentukan oleh pengilang, atau dijual dengan radas. Apabila troli digunakan, berhati-hati apabila menggerakkan kombinasi troli/radas untuk mengelakkan kecederaan daripada terbalik.
• Servis: Rujuk semua servis kepada kakitangan perkhidmatan yang berkelayakan. Servis diperlukan apabila radas telah rosak dalam apa jua cara, seperti kord bekalan kuasa atau palam rosak, cecair telah tertumpah atau objek jatuh ke dalam radas, radas telah terdedah kepada hujan atau lembapan, tidak beroperasi seperti biasa. , atau telah digugurkan.

3. Apa yang ada di dalam Kotak

Setelah membuka pembungkusan, pastikan semua komponen ada dan dalam keadaan baik:

• JBL Professional JRX218S 18-Inch Passive Subwoofer
• Manual Pengguna (dokumen ini)

Jika ada barang yang hilang atau rosak, sila hubungi pengedar anda dengan segera.

4. Panduan Persediaan

4.1 Penempatan

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 Sambungan

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 Pemasangan Tiang

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. Arahan Operasi

5.1 Pengendalian Kuasa

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 Penyepaduan Sistem

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. Penyelenggaraan

6.1 Pembersihan

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. Penyelesaian masalah

8. Spesifikasi Teknikal

Figure 4: Dimensions of the JRX218S subwoofer.

9. Waranti dan Sokongan

9.1 Maklumat Waranti

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 webtapak untuk terma dan syarat terperinci. Simpan bukti pembelian anda untuk tuntutan waranti.

9.2 Sokongan Pelanggan

For technical assistance, service, or further inquiries, please contact JBL Professional customer support. Contact details can typically be found on the official JBL webtapak atau dalam pembungkusan produk.