1. Introducció
The JBL Professional CBT 50LA-1 is a compact line array column speaker designed for a wide range of professional audio applications. It incorporates Constant Beamwidth Technology (CBT) to deliver consistent vertical coverage and clear sound reproduction. This manual provides essential information for the proper installation, operation, and maintenance of your CBT 50LA-1 speaker.
Figura 1: Frontal view of the JBL CBT 50LA-1 speaker with grille.
2. Característiques clau
- Constant Beamwidth Technology: Utilizes analog delay beamforming and amplitude tapering for consistent vertical coverage, minimizing narrow beaming and out-of-coverage lobing.
- Versatile Voicing: Features switchable voicing modes, offering a flat response for music or a mid-range presence peak for speech applications.
- Dynamic SonicGuard Overload Protection: Ensures reliable performance and protects the speaker from potential damage due to excessive power levels.
- Connectivitat flexible: Includes a built-in 70V/100V transformer with multiple taps (60W, 30W, 15W, 7.5W at 70V only) and an 8-ohm direct capability for integration into various sound systems.
- Construcció duradora: Drivers feature dual neodymium magnets for lightweight design, copper-capped pole pieces for reduced distortion, and butyl rubber surrounds for extended life in high humidity environments.
- Integrated Mounting: Supplied with a swivel (pan) / tilt wall bracket for enhanced aiming and flexible installation.
Figure 2: Illustration of Constant Beamwidth Technology for consistent sound distribution.
3. Configuració i instal·lació
Una instal·lació correcta és crucial per a un rendiment i una seguretat òptims. Es recomana que la instal·lació la realitzi personal qualificat.
3.1 Muntatge
The CBT 50LA-1 includes a swivel (pan) / tilt wall bracket for flexible mounting. Ensure the mounting surface can support the speaker's weight (17 pounds / 7.7 kg) and any associated hardware. Follow the instructions provided with the mounting bracket for secure attachment.
3.2 Cablejat i connexions
The speaker offers both 70V/100V constant voltage and 8-ohm direct operation. Select the appropriate setting using the switch located on the rear panel.
- 70V/100V Operation: Use the rotary switch to select the desired power tap (60W, 30W, 15W, or 7.5W for 70V systems only). Connect to a constant voltage ampsortida més elevada.
- 8 Ohm Operation: Select the 8 Ohm setting on the switch. Connect to a low-impedance ampsortida més elevada.
Figure 3: Rear panel of the CBT 50LA-1, illustrating connection terminals and switches.
Figure 4: Detail of the rear panel switches for power tap selection and EQ mode.
4. Instruccions de funcionament
4.1 Voicing Mode Selection
The CBT 50LA-1 features a switchable EQ mode to optimize sound for different content types:
- Mode de música: Provides a flat frequency response, ideal for music playback where full-range audio is desired.
- Mode de veu: Introduces a mid-range presence peak, enhancing vocal clarity and intelligibility for spoken word applications.
Select the desired mode using the EQ switch on the rear panel (refer to Figure 4).
4.2 Engegada/apagada
As a passive speaker, the CBT 50LA-1 does not have its own power switch. It receives power from the connected amplificador. Assegureu-vos el amplifier is turned off before making any connections. Turn on the amplifier after all connections are secure.
5. Manteniment
The JBL CBT 50LA-1 is designed for durability and requires minimal maintenance.
- Neteja: Use a soft, dry cloth to clean the exterior surfaces. Avoid abrasive cleaners or solvents that could damage the finish.
- Inspecció: Reviseu periòdicament totes les connexions i els elements de muntatge per assegurar-vos que es mantinguin segurs.
- Consideracions ambientals: The butyl rubber surrounds on the drivers are designed for long life, even in high humidity environments. However, avoid exposing the speaker to extreme temperatures or direct moisture for extended periods.
6. Solució De Problemes
If you encounter issues with your CBT 50LA-1 speaker, refer to the following common troubleshooting steps:
- Sense so:
- Comproveu que el ampel lifier està encès i funciona correctament.
- Comproveu totes les connexions del cable de l'altaveu a tots dos amplifier and the speaker. Ensure they are secure and correctly wired.
- Confirm the correct impedance or voltage tap setting is selected on the speaker's rear panel, matching your ampsortida del lifier.
- So distorsionat:
- Reduce the input level from the audio source or the amplifier volume. The speaker features Dynamic SonicGuard overload protection, but excessive input can still cause distortion.
- Check speaker wiring for any shorts or loose connections.
- Assegureu-vos el amplifier is not clipping or being overdriven.
- Uneven Sound Coverage:
- Review the speaker's aiming and tilt. Adjust the mounting bracket to optimize vertical coverage for the listening area.
- Ensure no obstructions are blocking the speaker's output.
If problems persist after performing these checks, contact JBL Professional customer support or a qualified audio technician.
7. Especificacions
The following table details the technical specifications for the JBL Professional CBT 50LA-1 speaker:
| Característica | Especificació |
|---|---|
| Nom del model | CBT 50LA-1 |
| Tipus d'altaveu | On-Wall, Compact Line Array Column Speaker |
| Power Capacity (8 ohm setting) | 150 W (600 W màxim) |
| Max SPL (Speech mode) | 115 dB (121 dB màxim) |
| Max SPL (Music mode) | 111 dB (117 dB màxim) |
| Interval de freqüència (-10 dB) | 80 Hz - 20 kHz |
| Sensitivity (2.83V@ 1m, Speech mode) | 93 dB (2 kHz - 14 kHz) |
| Sensitivity (2.83V@ 1m, Music mode) | 89 dB (300 Hz - 18 kHz) |
| Impedància | 8 ohms |
| 70V/100V Transformer Taps | 60W, 30W, 15W, (7.5W at 70V only) |
| Diàmetre del woofer | 2 Inches (Eight drivers) |
| Dimensions del producte (P x A x A) | 6" de profunditat x 3.9" d'amplada x 20.8" d'alçada (152 mm de profunditat x 99 mm d'amplada x 528 mm d'alçada) |
| Pes de l'article | 17 lliures (7.7 kg) |
| Tipus de muntatge | Wall Mount (Swivel/Tilt bracket included) |
| Material | Rubber (surrounds) |
| Color | Negre |
Figura 5: Intern view of the CBT 50LA-1, revealing the eight 2-inch drivers.
8. Informació de la garantia
The JBL Professional CBT 50LA-1 is covered by a Limited Manufacturer Warranty. For specific terms, conditions, and duration of the warranty, please refer to the warranty card included with your product or visit the official JBL Professional weblloc web. Conserveu el comprovant de compra per a reclamacions de garantia.
9. Suport
For further assistance, technical support, or service inquiries regarding your JBL Professional CBT 50LA-1 speaker, please visit the official JBL Professional weblloc o poseu-vos en contacte amb el seu departament d'atenció al client.
Podeu trobar més informació i recursos de suport a Botiga professional JBL.
