What to do if JBL speaker comes on but there is no sound?
If your JBL speaker comes on but produces no sound, there might be faulty cables and connections. Check the VU meters on the source mixer and verify that the CD/MP3 player is playing. Use headphones to confirm that the instrument is sending an audio signal. Disconnect and re-seat signal cables, and replace any suspected cables with known-good ones.
What to do if JBL speaker is connected to power but won’t come on?
If your JBL speaker is connected to working AC power but won’t turn on, a blown fuse could be the cause. Replace the fuse with the specified value and type. Alternatively, take your speaker to a competent service center.
What to do if JBL speaker is unresponsive?
If your JBL speaker is unresponsive, a system error may have occurred. Power cycle the speaker. You can also perform the Factory Soft Reset.
Why do my JBL PRX812W feedback and howl when the microphone volume is turned up?
If your JBL speakers are feeding back and howling when the microphone volume is turned up, it could be due to several reasons. One common cause is that the microphones are pointed directly into the speakers; repositioning the speakers, so they don't directly face the microphone's pickup pattern can help. Incorrect equalizer settings can also cause feedback; try locating the feedback frequency and reduce it using the mixer EQ or an external equalizer. Finally, excessive gain can be a culprit; reduce the gain at the mixer and move the microphone closer to the sound source.
What to do if JBL speaker signal sounds distorted and very loud, LIMIT LED is lit most of the time?
If you're experiencing distorted and very loud sound from your JBL speakers, and the LIMIT LED is frequently lit, it indicates that the input signal is too high, exceeding what the speakers can handle. To resolve this, reduce the output level of the source and turn down the level controls on the speaker.
Why is there noise or hiss heard at JBL speaker output?
If you are hearing noise or hiss from your JBL speaker's output, it may be due to a noisy source device. Try disconnecting the devices connected to your speaker one at a time. If the noise disappears, the issue lies with the source or its connecting cable.
Why does JBL speaker signal sound distorted at moderate volumes, LIMIT LED is not lit?
If your JBL speaker signal sounds distorted even at moderate volumes, and the LIMIT LED is not lit, the mixer or another source might be overdriving or clipping. Review the Owner’s Manual for your system setup and adjust controls as needed. Check input sensitivity gain and the gain structure of the signal chain.
Why do JBL PRX812W Speakers hum or buzz when the mixer level controls are moved?
If you're experiencing hum or buzz from your JBL speakers, and it increases or decreases when the mixer level controls are moved, it could be due to an improper A/C ground or faulty equipment connected to the mixer input. Disconnect or mute channels one at a time to isolate the problem. Also, a faulty cable between the source equipment and mixer may be the cause; substitute a known-good cable for the suspected faulty one.
Why do my JBL speakers hum or buzz?
If you're experiencing hum or buzz with your JBL speakers, it may be due to improper A/C grounding or ground loops. Try telescoping the audio ground by using an XLR/F to XLR/M adapter on one end, and re-route audio cables away from AC power and lighting cables. If you are using excessively long unbalanced cable runs, use the balanced outputs of your mixer or source equipment to drive your speakers or use a 'DI' direct injection box to convert your unbalanced equipment output to a balanced output. Also, check for improper system gain structure and review the Owner’s Manual for your system setup and adjust controls as needed, checking input sensitivity gain.
General| Product color | Black |
|---|---|
| LED indicators | Yes |
| Recommended usage | - |
| Speaker type | 2-way |
| Driver diameter | 375 mm |
| Woofer diameter | 305 mm |
| Speaker position | Front |
| Audio output channels | 1.0 channels |
| Impedance | 20000 Ω |
| Frequency range | 44.8 - 20000 Hz |
| RMS rated power | 1500 W |
| Crossover frequency | 1850 Hz |
| Audio RCA inputs | 1 |
| Connectivity technology | Wired & Wireless |
| Amplifier class | D |
| AC input voltage | 100 - 240 V |
| Power source type | AC |
| Finish type | Satin |
| Package weight | 21200 g |
Weight and Dimensions| Depth | 341 mm |
|---|---|
| Width | 385 mm |
| Height | 599 mm |
| Weight | 18100 g |
Safety guidelines for mounting speakers on stands or poles.
Safety information for suspending JBL loudspeakers.
Advice for users new to rigging, including seminars and engineers.
Lists of companies for rigging hardware and technical notes.
Guidance on safe suspension and rigging practices.
Details on load limits for M10 suspension points.
Warning about potential hearing damage from high SPL.
Explains the "Caution" symbol related to electric shock risk.
Explains the "Warning" symbol for fire/electric shock risk.
Lists safety and electromagnetic compatibility standards.
Details UL certification standards.
FCC rules regarding interference and operation.
Specifies AC power needs and supply considerations.
Instructions for powering the speaker system on and off.
Information on operating temperature and auto-shutdown.
Introduces key features like Wi-Fi control and durability.
Details the robust cabinet construction and finish.
Explains the technology behind the speaker drivers.
Describes wireless control capabilities via Wi-Fi.
Explains the concept of self-powered speaker systems.
Information on the company's environmental mission.
Comprehensive specifications for full-range models.
Comprehensive specifications for subwoofer models.
Details on system EQ modes and selection.
Explanations of front panel status LEDs.
Controls for setting input levels and mic selection.
Description of XLR and RCA input connectors.
Features and buttons for Wi-Fi setup and connection.
Controls for managing the mix output signal.
Controls for setting speaker polarity.
Input gain, signal indicators, and XLR inputs.
Wi-Fi link status and connection button.
Settings for the high-pass filter on the THRU connector.
THRU connector, Remote EQ, and Power LEDs.
Procedure to reset all DSP and network settings.
Procedure to reset only DSP settings.
JBL Professional's contact addresses.
Contact hours and phone number for customer service.
Website links for support and product registration.
Details on who is protected and what the warranty covers.
Information on who pays for repairs and how to obtain service.
Explanation of implied warranties and damage exclusions.
Advice on choosing compatible Wi-Fi routers.
Best practices for router configuration for optimal performance.
Instructions to modify existing Wi-Fi settings.
Summary of the PRX815W's main features.
Describes typical use cases for the PRX815W.
Technical specifications for the PRX815W.
Visual representation of frequency response.
Schematic showing signal flow within the speaker.
Key selling points and features of the PRX815W.
Core benefits and design philosophy for the series.
Lists items included in the product box.
Illustrates typical usage scenarios for the PRX815W.
Detailed list of product features.
Comprehensive technical data for the PRX815W.
Shipping and ordering details for the PRX815W.
Visual data for frequency response in different modes.
Visuals of the PRX Connect app interface.
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