1. Product Overview
The JBL Professional JRX225 is a portable, passive 2-way sound reinforcement loudspeaker system designed for professional audio applications. It features dual 15-inch low-frequency drivers and a 1-inch polymer diaphragm compression driver, delivering a nominal power of 500 W and a peak power of 2000 W. This system is engineered for durability and high-quality sound output across various environments.
Figure 1: Front view of the JBL Professional JRX225 loudspeaker, showcasing its dual 15-inch woofers and high-frequency driver behind a protective grille.
Key features include a 2.5-inch diameter edge-wound ribbon voice coil for enhanced efficiency and power handling, and SonicGuard™ technology to protect the high-frequency driver from excessive power. The advanced crossover network ensures seamless frequency response and high power handling. The enclosure is constructed from durable .75-inch MDF with an 18-gauge perforated steel grille for component protection. Ergonomic, non-resonant steel handles facilitate transport.
Figure 2: Angled front view of the JBL Professional JRX225, highlighting its robust construction and grille design.
2. Setup and Connection
2.1 Unpacking
Carefully remove the JRX225 loudspeaker from its packaging. Inspect the unit for any signs of damage that may have occurred during shipping. Retain the original packaging for future transport or storage.
2.2 Placement
The JRX225 can be placed directly on a stable surface or utilized with its dual-angle pole-mount socket. This socket allows for a 10° tilt, optimizing audience coverage and sound distribution. Ensure the speaker is placed on a flat, stable surface to prevent tipping. For optimal sound, position speakers to cover the intended listening area without obstructions.
2.3 Connections
As a passive loudspeaker, the JRX225 requires an external amplifier. Connect the speaker to a suitable power amplifier using high-quality speaker cables. The JRX225 features Neutrik Speakon NL-4 (x1) and 1/4" TS phone jack (x1) parallel connectors. Ensure proper polarity (+ to + and - to -) when making connections to avoid phase issues.
- Speakon NL-4: Recommended for secure and high-power connections.
- 1/4" TS Phone Jack: Suitable for standard connections.
The recommended amplifier power is 250 W to 500 W into 8 ohms. Using an amplifier outside this range may result in suboptimal performance or damage.
Figure 3: Rear view of the JBL Professional JRX225, displaying the Neutrik Speakon NL-4 and 1/4" TS phone jack input connectors.
3. Operation
3.1 Powering On/Off
Since the JRX225 is a passive speaker, its power is supplied by the connected amplifier. Always ensure your amplifier is turned off before connecting or disconnecting speakers. Turn on your amplifier after all connections are secure, and turn it off before disconnecting.
3.2 Volume Control
Adjust the volume through your amplifier or mixing console. Start with low volume levels and gradually increase to the desired output. Avoid operating the system at excessively high volumes for extended periods to prevent potential damage to the speakers or hearing impairment.
3.3 Sound Optimization
For optimal sound quality, consider using an external equalizer or crossover with your amplifier. This allows for fine-tuning of frequency response to suit the acoustic environment and musical content. The JRX225's Progressive Transition™ waveguide ensures superior coverage and reduced distortion, but further optimization can enhance performance.
4. Maintenance
4.1 Cleaning
Clean the exterior of the loudspeaker with a soft, dry cloth. Do not use abrasive cleaners, solvents, or excessive moisture, as these can damage the finish or internal components. Periodically check the grille for dust or debris and gently remove it.
4.2 Storage
When not in use, store the JRX225 in a cool, dry environment, away from direct sunlight and extreme temperatures. If transporting, use appropriate covers or cases to protect the enclosure and grille from physical damage.
4.3 Protection
The JRX225 incorporates SonicGuard™ technology to protect the high-frequency driver. However, continuous operation at clipping levels or with an underpowered/overpowered amplifier can still cause damage. Always monitor your amplifier's output and avoid prolonged signal clipping.
5. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No Sound Output |
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| Distorted Sound |
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| Low Volume Output |
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6. Technical Specifications
| Feature | Detail |
|---|---|
| Model Name | JRX225 |
| Speaker Type | Passive 2-Way |
| Woofer Diameter | Dual 15 Inches |
| Tweeter Diameter | 1 Inch |
| Power Rating (Nominal/Peak) | 500 W / 2000 W |
| Recommended Amplifier Power | 250 W to 500 W into 8 ohms |
| Impedance | 8 Ohms |
| Frequency Range (-10dB) | 42 Hz - 18 kHz |
| Frequency Response (±3 dB) | 62 Hz - 13 kHz |
| Sensitivity (@1m) | 100 dB SPL (1w/1m) |
| Maximum SPL (1m) | 133 dB |
| Connectivity Technology | Neutrik Speakon NL-4 (x1); ¼" TS phone jack (x1); parallel |
| Mounting Type | Tripod, Freestanding (Dual-angle pole-mount socket) |
| Product Dimensions (D x W x H) | 16.8"D x 18.3"W x 43"H |
| Item Weight | 94 Pounds |
| Material | MDF enclosure, Alloy Steel grille |
| Color | Black |
Figure 4: Dimensional diagram of the JBL Professional JRX225 loudspeaker, indicating its height, width, and depth.
7. Warranty and Support
7.1 Warranty Information
The JBL Professional JRX225 loudspeaker system comes with a limited warranty. Please refer to the warranty card included with your product or visit the official JBL Professional website for detailed terms and conditions regarding coverage, duration, and service procedures.
7.2 Customer Support
For technical assistance, troubleshooting beyond this manual, or service inquiries, please contact JBL Professional customer support. Contact information can typically be found on the official JBL website or in your product documentation. When contacting support, please have your product model number (JRX225) and serial number available.
