1. ບົດແນະນຳ
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.
ຮູບ 1: ດ້ານຫນ້າ view of the JBL Professional JRX218S 18-Inch Passive Subwoofer.
2. ຂໍ້ມູນຄວາມປອດໄພທີ່ສໍາຄັນ
- ອ່ານຄໍາແນະນໍາ: ຮັກສາຄໍາແນະນໍາເຫຼົ່ານີ້ສໍາລັບການອ້າງອີງໃນອະນາຄົດ.
- ຄຳເຕືອນໃຫ້ລະວັງ: ປະຕິບັດຕາມຄໍາເຕືອນທັງຫມົດກ່ຽວກັບຜະລິດຕະພັນແລະໃນຄໍາແນະນໍາການດໍາເນີນງານ.
- ນ້ໍາແລະຄວາມຊຸ່ມ: ຢ່າໃຊ້ອຸປະກອນນີ້ຢູ່ໃກ້ກັບນ້ໍາ.
- ທໍາຄວາມສະອາດ: ເຮັດຄວາມສະອາດດ້ວຍຜ້າແຫ້ງເທົ່ານັ້ນ.
- ການລະບາຍອາກາດ: ຫ້າມປິດຊ່ອງລະບາຍອາກາດໃດໆ. ຕິດຕັ້ງຕາມຄໍາແນະນໍາຂອງຜູ້ຜະລິດ.
- ຄວາມຮ້ອນ: ຫ້າມຕິດຕັ້ງໃກ້ກັບແຫຼ່ງຄວາມຮ້ອນເຊັ່ນລັງສີ, ເຄື່ອງບັນທຶກຄວາມຮ້ອນ, ເຕົາຫຼືອຸປະກອນອື່ນໆ (ລວມທັງ. amplifiers) ທີ່ຜະລິດຄວາມຮ້ອນ.
- ການປົກປ້ອງສາຍໄຟ: ປົກປ້ອງສາຍໄຟຈາກການຖືກສຽບ ຫຼື ສຽບ, ໂດຍສະເພາະຢູ່ປລັກສຽບ, ກ່ອງຮັບສະດວກ, ແລະຈຸດທີ່ພວກມັນອອກຈາກອຸປະກອນ.
- ອຸປະກອນເສີມ: ໃຊ້ພຽງແຕ່ໄຟລ໌ແນບ/ອຸປະກອນເສີມທີ່ລະບຸໂດຍຜູ້ຜະລິດ.
- ການຕິດຕັ້ງ: ໃຊ້ກັບລົດເຂັນ, ຂາຕັ້ງ, ຂາຕັ້ງ, ວົງເລັບ, ຫຼືຕາຕະລາງທີ່ລະບຸໂດຍຜູ້ຜະລິດ, ຫຼືຂາຍດ້ວຍອຸປະກອນ. ເມື່ອລົດເຂັນຖືກນຳໃຊ້, ໃຫ້ໃຊ້ຄວາມລະມັດລະວັງໃນເວລາເຄື່ອນຍ້າຍເຄື່ອງພ້ອມໆກັນຂອງລົດເຂັນ/ອຸປະກອນເພື່ອຫຼີກລ່ຽງການບາດເຈັບຈາກການປີ້ນ.
- ການບໍລິການ: ອ້າງອີງການບໍລິການທັງໝົດໃຫ້ກັບພະນັກງານບໍລິການທີ່ມີຄຸນວຸດທິ. ການບໍລິການແມ່ນຕ້ອງການເມື່ອອຸປະກອນໄດ້ຮັບຄວາມເສຍຫາຍໃນທາງໃດກໍ່ຕາມເຊັ່ນ: ສາຍໄຟຫຼືປລັກສຽບຖືກເສຍຫາຍ, ແຫຼວຮົ່ວໄຫຼຫຼືສິ່ງຂອງຕົກເຂົ້າໄປໃນອຸປະກອນ, ອຸປະກອນຖືກຝົນຫຼືຄວາມຊຸ່ມຊື່ນ, ບໍ່ເຮັດວຽກຕາມປົກກະຕິ. , ຫຼືໄດ້ຖືກຫຼຸດລົງ.
3. ສິ່ງທີ່ຢູ່ໃນກ່ອງ
Upon opening the packaging, verify that all components are present and in good condition:
- JBL Professional JRX218S 18-Inch Passive Subwoofer
- ຄູ່ມືຜູ້ໃຊ້ (ເອກະສານນີ້)
ຖ້າລາຍການໃດຂາດຫາຍໄປຫຼືເສຍຫາຍ, ກະລຸນາຕິດຕໍ່ຕົວແທນຈໍາຫນ່າຍຂອງທ່ານທັນທີ.
4. ຄູ່ມືການຕິດຕັ້ງ
4.1 ການຈັດວາງ
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 ການເຊື່ອມຕໍ່
The JRX218S is a passive subwoofer and requires an external ampເຄື່ອງຊ່ວຍຊີວິດ. ເຊື່ອມຕໍ່ຂອງທ່ານ 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 ການຕິດຕັ້ງເສົາ
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. ຄໍາແນະນໍາການດໍາເນີນງານ
5.1 ການຈັດການພະລັງງານ
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 ການເຊື່ອມໂຍງລະບົບ
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. ບໍາລຸງຮັກສາ
6.1 ການທໍາຄວາມສະອາດ
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. ການແກ້ໄຂບັນຫາ
| ບັນຫາ | ສາເຫດທີ່ເປັນໄປໄດ້ | ການແກ້ໄຂ |
|---|---|---|
| ບໍ່ມີສຽງອອກ |
|
|
| ສຽງບິດເບືອນ |
|
|
| Weak or Insufficient Bass |
|
|
8. ຂໍ້ກໍານົດດ້ານວິຊາການ
| ຄຸນສົມບັດ | ລາຍລະອຽດ |
|---|---|
| ຕົວແບບ | JRX218S |
| ປະເພດລຳໂພງ | Subwoofer Passive |
| Woofer ເສັ້ນຜ່າສູນກາງ | 18 ນິ້ວ |
| Power Handling (Continuous/Peak) | 350W / 1400W |
| impedance | 4 ໂອມ |
| ລະດັບຄວາມຖີ່ (-10dB) | 34Hz - 250Hz |
| ການຕອບສະ ໜອງ ຄວາມຖີ່ (± 3dB) | 53Hz - 250Hz |
| ສູງສຸດ SPL ສູງສຸດ | 133dB SPL |
| ການເຊື່ອມຕໍ່ | 2 x SpeakON NL-4 (parallel) |
| ວັດສະດຸຫຸ້ມຫໍ່ | 19 mm (.75 in) MDF with black carpet covering |
| ປີ້ງ | 18-gauge perforated steel |
| ເສົາພູ | Top-mounted, cast aluminum 35 mm receptacle |
| ຂະໜາດ (H x W x D) | 23.5" x 20.3" x 22" (597 mm x 516 mm x 559 mm) |
| ນ້ຳໜັກ | 71 lbs (32.5 ກິໂລ) |
Figure 4: Dimensions of the JRX218S subwoofer.
9. ການຮັບປະກັນແລະການສະຫນັບສະຫນູນ
9.1 ຂໍ້ມູນການຮັບປະກັນ
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 webເວັບໄຊສໍາລັບຂໍ້ກໍານົດແລະເງື່ອນໄຂລະອຽດ. ຮັກສາຫຼັກຖານການຊື້ຂອງທ່ານສໍາລັບການຮ້ອງຂໍການຮັບປະກັນ.
9.2 ສະຫນັບສະຫນູນລູກຄ້າ
For technical assistance, service, or further inquiries, please contact JBL Professional customer support. Contact details can typically be found on the official JBL webສະຖານທີ່ຫຼືຢູ່ໃນການຫຸ້ມຫໍ່ຜະລິດຕະພັນ.