JBL Professional Control 28-1 Speaker Instruction Manual

1. Produk Lebihview

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.

Rajah 1: Depan view of the JBL Professional Control 28-1 speaker, showcasing its black grille and robust design.

2. Maklumat Keselamatan

Before installation and operation, please read and understand all safety instructions. Keep this manual for future reference.

• Pastikan semua sambungan elektrik dibuat oleh kakitangan yang berkelayakan dan mematuhi kod elektrik tempatan.
• 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. Persediaan dan Pemasangan

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 Membongkar

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.

Komponen yang Disertakan: JBL Professional Control 28-1 High Output Indoor/Outdoor Background/Foreground Speaker, Black (Sold as Pair).

3.2 Pilihan Pemasangan

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.

Rajah 2: Belakang 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 Sambungan Pendawaian

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 amppenyambung dimatikan.

• For 8Ω Operation: Sambungkan anda 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: Pilih wat yang dikehendakitage 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. Arahan Operasi

Once installed and wired, the JBL Control 28-1 speakers are ready for operation. These are passive speakers and require an external amplebih hidup.

• Hidupkan kuasa: Hidupkan anda amppengalir. Mulakan dengan amplifier volume at its lowest setting.
• Pelarasan Kelantangan: Meningkatkan secara beransur-ansur amplifier volume to the desired listening level.
• Kualiti Bunyi: 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 ampoutput penguat.

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. Penyelenggaraan

The JBL Control 28-1 speakers are built with durable, weather-resistant materials for long-lasting performance with minimal maintenance.

• Pembersihan: Gunakan yang lembut, damp cloth to wipe down the speaker enclosures. Avoid harsh chemicals or abrasive cleaners, which can damage the finish.
• Penjagaan gril: The grille can be gently cleaned with a soft brush or vacuum cleaner to remove dust and debris.
• Pemeriksaan: Periodically check mounting hardware for tightness, especially in outdoor installations, to ensure the speakers remain securely fastened.
• Pertimbangan Alam Sekitar: 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. Penyelesaian masalah

If you encounter issues with your JBL Control 28-1 speakers, refer to the following common troubleshooting steps:

If the problem persists after trying these steps, contact JBL Professional customer support or your authorized dealer.

7. Spesifikasi

Detailed technical specifications for the JBL Professional Control 28-1 speaker:

Figure 3: Dimensional drawing of the JBL Control 28-1 speaker, showing height, width, and depth measurements.

8. Waranti dan Sokongan

8.1 Maklumat Waranti

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 Sokongan Pelanggan

For technical assistance, service, or warranty claims, please contact JBL Professional customer support. You can find contact information on the official JBL Professional webtapak atau melalui pengedar sah anda.

When contacting support, please have your product model number (Control 28-1) and purchase date available.

9. Sumber Tambahan

For further information, including detailed installation guides, product datasheets, and accessories, please visit the official JBL Professional webtapak:

JBL Professional Official Webtapak

10. Video Produk

Watch these official videos for more insights into JBL Professional products and their applications.