1. ផលិតផលលើសview
The JBL Professional Control 28-1 is a high-output 8-inch speaker designed for both indoor and outdoor sound reinforcement applications. It features an 8-inch woofer with a woven fiberglass cone and a 1-inch PEI diaphragm tweeter with fluid cooling, providing a broad frequency response from 45 Hz to 20 kHz. The speaker offers a wide 100° x 100° consistent coverage pattern, making it suitable for various environments requiring high-fidelity background or foreground audio.
This speaker is built with weather-resistant components, ensuring durability in diverse settings. It supports 120 Watt power handling (240 Watt program) in a direct 8Ω setting and includes a built-in 60 Watt 70V/100V multi-tap transformer for flexible integration into commercial audio systems.
រូបភាពទី 1: ផ្នែកខាងមុខ view of the JBL Professional Control 28-1 speaker, showcasing its black grille and robust design.
2. ព័ត៌មានសុវត្ថិភាព
Before installation and operation, please read and understand all safety instructions. Keep this manual for future reference.
- Ensure all electrical connections are made by qualified personnel and comply with local electrical codes.
- Do not expose the speaker to extreme temperatures or direct water spray beyond its weather-resistant rating.
- Use appropriate mounting hardware and techniques to secure the speaker. Improper installation can result in injury or damage.
- Avoid operating the speaker at excessively high volumes for prolonged periods to prevent hearing damage and speaker component wear.
3. ការដំឡើងនិងការដំឡើង
The Control 28-1 speakers are sold as a pair and are designed for versatile mounting. They include built-in InvisiBall® mounting hardware for discreet and flexible positioning. An optional U-bracket (sold separately) is also available for additional mounting options.
3.1 ការវេចខ្ចប់
Carefully remove the speakers from their packaging. Verify that all components listed in the "What's in the Box" section are present. Inspect the speakers for any signs of damage during transit. If damage is found, contact your dealer immediately.
សមាសធាតុរួមបញ្ចូល៖ JBL Professional Control 28-1 High Output Indoor/Outdoor Background/Foreground Speaker, Black (Sold as Pair).
3.2 ជម្រើសម៉ោន
The speaker can be mounted to a wall, ceiling, or post. The built-in InvisiBall mounting system allows for precise aiming and a clean aesthetic. Refer to the detailed InvisiBall mounting instructions provided with the speaker for specific steps.
រូបភាពទី 2: ខាងក្រោយ view of the speaker, highlighting the input terminals and the 70V/100V transformer tap selector.
For U-bracket installation, ensure the bracket is securely fastened to the mounting surface before attaching the speaker. Always use appropriate fasteners for the wall or ceiling material.
3.3 ការតភ្ជាប់ខ្សែភ្លើង
The Control 28-1 supports both direct 8Ω operation and 70V/100V constant voltage systems via its built-in transformer. Before making connections, ensure your amplifier ត្រូវបានបិទ។
- For 8Ω Operation: ភ្ជាប់របស់អ្នក។ amplifier's output directly to the speaker's input terminals. Ensure the transformer tap selector on the rear of the speaker is set to the 8Ω position.
- For 70V/100V Systems: ជ្រើសរើសវ៉ាត់ដែលចង់បានtage tap (e.g., 60W, 30W, 15W, 7.5W for 70V, or 60W, 30W, 15W for 100V) using the rotary switch on the rear of the speaker. Connect the 70V/100V amplifier output to the speaker's input terminals.
Always observe correct polarity (+ to + and - to -) for all connections to ensure proper phase and optimal sound quality.
4. សេចក្តីណែនាំប្រតិបត្តិការ
Once installed and wired, the JBL Control 28-1 speakers are ready for operation. These are passive speakers and require an external ampកាន់តែចាស់។
- បើកថាមពល៖ បើករបស់អ្នក។ ampឧបករណ៍បង្កើនថាមពល។ ចាប់ផ្តើមជាមួយ amplifier volume at its lowest setting.
- ការលៃតម្រូវកម្រិតសំឡេង៖ បង្កើនបន្តិចម្តង ៗ amplifier volume to the desired listening level.
- គុណភាពសំឡេង៖ The speakers are designed to deliver high-fidelity sound with a broad frequency response. If the sound is distorted, reduce the volume or check your ampទិន្នផលរបស់ lifier ។
While the product specifications mention "Control Method: App" and "Wireless Communication Technology: Bluetooth", these features typically refer to control of a connected amplifier or system, not direct Bluetooth audio streaming to the passive Control 28-1 speakers themselves. These speakers are designed for wired audio input.
5. ការថែទាំ
The JBL Control 28-1 speakers are built with durable, weather-resistant materials for long-lasting performance with minimal maintenance.
- ការសម្អាត៖ ប្រើទន់ ឃamp cloth to wipe down the speaker enclosures. Avoid harsh chemicals or abrasive cleaners, which can damage the finish.
- Grille Care: The grille can be gently cleaned with a soft brush or vacuum cleaner to remove dust and debris.
- អធិការកិច្ច៖ Periodically check mounting hardware for tightness, especially in outdoor installations, to ensure the speakers remain securely fastened.
- ការពិចារណាអំពីបរិស្ថាន៖ While weather-resistant, prolonged exposure to extreme conditions (e.g., direct heavy rain, snow, or intense sunlight) may affect the speaker's lifespan. The product specification "Is Waterproof: FALSE" indicates it is not designed for full submersion or direct high-pressure water exposure.
6. ការដោះស្រាយបញ្ហា
If you encounter issues with your JBL Control 28-1 speakers, refer to the following common troubleshooting steps:
| បញ្ហា | មូលហេតុដែលអាចកើតមាន | ដំណោះស្រាយ |
|---|---|---|
| មិនមានសំឡេងពីឧបករណ៍បំពងសំឡេងទេ។ |
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| សំឡេងខូចឬមិនច្បាស់ |
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| សំឡេងរំខាន |
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If the problem persists after trying these steps, contact JBL Professional customer support or your authorized dealer.
7. លក្ខណៈបច្ចេកទេស
Detailed technical specifications for the JBL Professional Control 28-1 speaker:
| ឈ្មោះម៉ូដែល | ការគ្រប់គ្រង ២៣-១ |
| ប្រភេទឧបករណ៍បំពងសំឡេង | Satellite, Passive |
| អង្កត់ផ្ចិត Woofer | 8 Inches (20.32 cm) with woven fiberglass cone |
| អង្កត់ផ្ចិត Tweeter | 1 Inch with PEI diaphragm and fluid cooling |
| Power Handling (8Ω) | 120 Watts (Continuous Program), 240 Watts (Peak) |
| Transformer Taps (70V) | 60W, 30W, 15W, 7.5W |
| Transformer Taps (100V) | 60W, 30W, 15W |
| ការឆ្លើយតបប្រេកង់ | 45 Hz - 20 kHz |
| មុំគ្របដណ្តប់ | 100° x 100° |
| បញ្ចូលវ៉ុលtage | 100 Volts (for 100V systems) |
| សម្ភារៈ | High Impact Polystyrene (HIPS) with 10% glass fill |
| ប្រភេទម៉ោន | Wall Mount, Ceiling Mount (InvisiBall included, U-bracket optional) |
| ទំហំផលិតផល (H x W x D) | 15" x 11.1" x 8.6" (381mm x 282mm x 219mm) |
| ទំងន់ធាតុ | 16.6 ផោន (7.53 គីឡូក្រាម) |
| ពណ៌ | ខ្មៅ |
| មិនជ្រាបទឹក។ | FALSE (Weather-resistant, not fully waterproof) |
| បច្ចេកវិទ្យាតភ្ជាប់ | មានខ្សែ |
| ចំនួនធាតុ | 2 (Sold as a pair) |
Figure 3: Dimensional drawing of the JBL Control 28-1 speaker, showing height, width, and depth measurements.
8. ការធានា និងការគាំទ្រ
8.1 ព័ត៌មានធានា
The JBL Professional Control 28-1 speakers come with a Limited Manufacturer's Warranty. Please refer to the warranty card included with your product or visit the official JBL Professional website for detailed terms and conditions, including coverage period and limitations.
8.2 ជំនួយអតិថិជន
For technical assistance, service, or warranty claims, please contact JBL Professional customer support. You can find contact information on the official JBL Professional webគេហទំព័រ ឬតាមរយៈអ្នកចែកបៀដែលមានការអនុញ្ញាតរបស់អ្នក។
When contacting support, please have your product model number (Control 28-1) and purchase date available.
9. ធនធានបន្ថែម
For further information, including detailed installation guides, product datasheets, and accessories, please visit the official JBL Professional webគេហទំព័រ៖
10. វីដេអូផលិតផល
Watch these official videos for more insights into JBL Professional products and their applications.
JBL Professional Product Overview
វីដេអូនេះផ្ដល់ជូនទូទៅview of JBL Professional's product range and philosophy. (Duration: 1:09)
JBL Professional Audio Solutions
Explore various audio solutions offered by JBL Professional for different applications. (Duration: 0:53)
JBL Professional Sound System Integration
A video demonstrating the integration of JBL Professional sound systems. (Duration: 1:01)
