Introduction
This user manual provides comprehensive instructions for the JINGHAO JH-A39 Rechargeable BTE Personal Sound Amplifier. Please read this manual carefully before using the device to ensure proper operation, maintenance, and to maximize its lifespan. This amplifier is designed to enhance sound for clearer conversations and improved listening experiences in various environments.
Package Contents
Upon unboxing, please verify that all components listed below are present and in good condition.
Figure 1: Complete set of accessories for the JINGHAO JH-A39 Personal Sound Amplifier. This includes the shockproof charging case, two sound amplifiers, a USB charging cable, three pairs of ear domes (S/M/L), the instruction manual, and a cleaning tool.
Figure 2: A detailed view of the included accessories, highlighting the various components that come with your sound amplifier kit.
- 2 x JINGHAO JH-A39 Personal Sound Amplifiers
- 1 x Portable Charging Case
- 1 x USB Charging Cable
- 3 x Pairs of Ear Domes (Small, Medium, Large)
- 1 x Cleaning Tool
- 1 x User Manual (this document)
Setup
1. Charging the Device
Before first use, fully charge the sound amplifiers and the portable charging case.
- Connect the USB charging cable to the charging case and a power source (e.g., computer USB port, wall adapter).
- Place the sound amplifiers into their respective slots in the charging case. Ensure they are correctly seated for charging.
- The charging lights on the case will indicate the charging status. Blue light indicates charging, while white light indicates fully charged.
- A full charge for the amplifiers takes approximately 2 hours, providing up to 10 hours of usage. The portable charging case provides three full charging cycles for both amplifiers, offering an additional 30 hours of use.
Figure 3: The sound amplifier placed in the portable charging case, showing the blue indicator lights during charging.
Figure 4: Charging specifications: 2 hours for amplifier charge (10 hours use), portable case provides 3 full charges (30 additional hours).
Figure 5: Visual guide for charging status: Blue light indicates charging, white light indicates fully charged.
Figure 6: The portable charging case allows for convenient charging of your amplifiers anytime, anywhere.
2. Selecting and Attaching Ear Domes
Choose the ear dome size (Small, Medium, Large) that provides the most comfortable and secure fit in your ear canal. A proper fit is crucial for optimal sound quality and to prevent feedback.
Figure 7: The three available sizes of ear domes (Small, Medium, Large) to ensure a comfortable and effective fit.
Figure 8: The left and right sound amplifiers, showing where the ear domes attach.
- Gently push the chosen ear dome onto the sound amplifier's nozzle until it is securely attached.
3. Wearing the Sound Amplifier
Insert the sound amplifier into your ear canal. Ensure it fits snugly and comfortably. The correct direction is important for both comfort and performance.
Figure 9: Visual guide for correct wearing of the amplifier and troubleshooting howling issues.
- Choose the right size earplugs to ensure there is no gap between the earplug and your ear.
- Insert the amplifier into your ear. If you hear a high-pitched squealing sound, the position may not be correct. Adjust until the sound stops.
- Once properly inserted, you can proceed to power on the device.
Operating Instructions
1. Power On/Off
The JINGHAO JH-A39 features a simple one-button operation.
- To Power On: Press and hold the main button on the amplifier for approximately 3 seconds until you hear an indication sound.
- To Power Off: Press and hold the main button again for approximately 3 seconds.
Figure 10: Overview of the amplifier's components, including the multi-function button for power and volume.
2. Volume Control
The amplifier has 6 levels of volume control. Adjust the volume to a comfortable listening level.
Figure 11: Visual representation of the 6 volume levels and the adjustment cycle.
Figure 12: Another depiction of the 6-level volume control system.
- To Adjust Volume: Briefly press the main button once. Each press will cycle through the 6 volume levels.
- When the volume reaches the lowest level, the next press will set it to the highest level, and the cycle repeats.
- It is recommended to start with a lower volume setting and gradually increase it to a comfortable level.
3. Usage Scenarios
The JINGHAO JH-A39 is designed for various daily scenarios, enhancing your listening experience wherever you are.
Figure 13: The amplifier is versatile for use in meetings, during sports, outdoors, and indoors.
- Meetings: Improve clarity of speech in group discussions.
- Sport: Enjoy outdoor activities with enhanced ambient sounds.
- Outdoor: Better perceive sounds in open environments.
- Indoor: Enhance conversations and media listening at home.
Maintenance
Regular cleaning and proper storage will ensure the longevity and optimal performance of your sound amplifiers.
- Daily Cleaning: After each use, gently wipe the amplifier and ear dome with a soft, dry cloth. Use the provided cleaning tool to remove any earwax or debris from the ear dome and sound outlet.
- Avoid Moisture: Do not expose the amplifiers to water or excessive moisture. If they become damp, dry them thoroughly before placing them back in the charging case.
- Storage: When not in use, store the amplifiers in their portable charging case. The case is designed to be shockproof, protecting the devices from damage.
- Ear Dome Replacement: Replace ear domes periodically or if they become damaged or discolored to maintain hygiene and sound quality.
Troubleshooting
If you encounter any issues with your JINGHAO JH-A39 Personal Sound Amplifier, please refer to the following common problems and solutions.
| Problem | Possible Cause | Solution |
|---|---|---|
| High-pitched squealing/howling sound (feedback) |
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| No sound or very low sound |
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| Device not charging |
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Specifications
| Feature | Detail |
|---|---|
| Model Name | JINGHAO (JH-A39-Black002) |
| Brand | JingHao |
| Power Source | Rechargeable (Lithium-ion battery) |
| Battery Type | 1 Lithium-ion (included) |
| Charging Time | Approx. 2 hours for amplifiers |
| Usage Time | Up to 10 hours per charge (amplifiers) |
| Charging Case Capacity | Provides 3 additional charging cycles (approx. 30 hours) |
| Volume Control | 6 levels |
| Color | Black |
| Item Weight | 36 Grams |
| Product Dimensions (Package) | 10.8 x 10.8 x 6.9 cm |
| Manufacturer | JINGHAO |
| Country of Origin | China |
Warranty and Support
JINGHAO provides a 12-month warranty for this product. If you have any questions or require assistance, please do not hesitate to contact our customer service. We are committed to providing the best customer support.
For support, please refer to the contact information provided with your purchase or visit the official JingHao store on Amazon: JingHao Amazon Store.
