1. Introduction
Welcome to the user manual for your Hiwill Nimbus A512 5.1.2CH Dolby Atmos Soundbar System. This system is designed to elevate your home cinema experience with immersive, three-dimensional audio. Featuring 11 speakers, including front, rear, side, and up-firing drivers, along with a 6.5-inch wireless subwoofer, the Nimbus A512 delivers dynamic and realistic sound. This manual provides essential information for setup, operation, maintenance, and troubleshooting to ensure optimal performance of your device.

Key Features:
- 5.1.2 Channel Dolby Atmos: Experience object-based audio that surrounds you from all directions, including overhead.
- 11 High-Performance Speakers: Comprising 4 front, 2 rear, 2 side-firing, and 2 up-firing speakers for precise sound positioning.
- 6.5-inch Wireless Subwoofer: Delivers powerful, deep bass for impactful audio.
- HXS Processing: Ensures crystal-clear dialogue and enhanced audio detail.
- 12-Level Independent Volume Control: Customize the volume of the wired rear surround speakers.
- Multiple Connectivity Options: HDMI ARC, Optical, USB, Auxiliary, and Bluetooth 5.3.
2. Important Safety Information
Please read all safety instructions carefully before using this product. Retain this manual for future reference.
- Do not expose the device to rain or moisture.
- Do not place objects filled with liquids, such as vases, on the device.
- Ensure proper ventilation; do not block any ventilation openings.
- Protect the power cord from being walked on or pinched.
- Only use attachments/accessories specified by the manufacturer.
- Unplug the device during lightning storms or when unused for long periods.
- Refer all servicing to qualified service personnel.
- The product is not waterproof. Avoid contact with water.
3. Package Contents
Verify that all items listed below are included in your package:
- Hiwill Nimbus A512 Soundbar
- Wireless Subwoofer
- Wired Surround Speakers (x2)
- Remote Control
- Remote Control Batteries
- HDMI ARC Cable
- Optical Digital Cable
- 3.5mm to 3.5mm Stereo Audio Cable
- Power Cable (for Soundbar)
- Power Cable (for Subwoofer)
- Wall Mount Kit
- User Manual (this document)
4. Setup and Installation
4.1 Placement
For optimal audio performance, consider the following placement guidelines:
- Soundbar: Place the soundbar centrally below your television, ensuring no obstructions block the front, side, or up-firing speakers. It can be placed on a table or wall-mounted using the provided kit.
- Wireless Subwoofer: Position the subwoofer on the floor, ideally in the front corner of the room or near the soundbar. Experiment with placement to find the best bass response for your room.
- Wired Rear Surround Speakers: Place these speakers behind your listening position, to the left and right. Ensure they are connected to the soundbar via their respective cables.

4.2 Connections
Connect your soundbar to your television and other devices using the appropriate cables.
- Power Connection:
- Connect the soundbar to a power outlet using its power cable.
- Connect the wireless subwoofer to a power outlet using its power cable.
- Audio Connection to TV (Recommended):
- For Dolby Atmos support, connect the HDMI ARC cable from the soundbar's HDMI ARC port to your TV's HDMI ARC/eARC port. Ensure your TV's audio output is set to "External Speaker" and "Dolby Atmos" or "Bitstream".
- Alternatively, use the Optical Digital Cable to connect the soundbar's OPTICAL IN port to your TV's optical output.
- Connecting Rear Surround Speakers:
- Connect the wired rear surround speakers to the designated ports on the soundbar.

Image 4.2: The two wired rear surround speakers, showing their connection points and independent volume controls. - Bluetooth Connection:
- Press the Bluetooth button on the remote or soundbar to enter pairing mode. The display will show "BT".
- On your mobile device, search for "Hiwill Nimbus A512" and connect.
- Other Connections:
- USB: Insert a USB drive into the USB port for media playback.
- AUX: Use the 3.5mm audio cable to connect to devices with a 3.5mm audio output.
4.3 Subwoofer Pairing
The wireless subwoofer should automatically pair with the soundbar upon powering on both devices. If pairing fails:
- Ensure both the soundbar and subwoofer are powered on.
- Press and hold the "Pairing" button on the back of the subwoofer (refer to the subwoofer diagram in the quick start guide).
- On the soundbar remote, press the "Pair" button (if available) or cycle through input modes until the subwoofer connects.
- A solid blue LED on the subwoofer indicates a successful connection.

5. Operating Instructions
5.1 Basic Operation
- Power On/Off: Press the Power button on the remote control or soundbar.
- Volume Control: Use the Volume Up (+) and Volume Down (-) buttons on the remote or soundbar.
- Input Selection: Press the "Input" or "Source" button on the remote to cycle through HDMI ARC, Optical, Bluetooth, USB, and AUX inputs.
- Mute: Press the Mute button on the remote to temporarily silence the audio.
5.2 Audio Modes and Settings
- Dolby Atmos: When connected via HDMI ARC to a compatible source, the soundbar will automatically detect and play Dolby Atmos content, creating an immersive 3D sound experience.
- HXS Processing: This technology enhances dialogue clarity and brings out fine audio details. It operates automatically with supported content.
- Rear Speaker Volume: Use the dedicated rear speaker volume controls on the remote to adjust the level of the wired surround speakers (12 levels available).
- Subwoofer Level: Adjust the subwoofer's bass level using the remote control to suit your preference.


6. Maintenance
Proper care and maintenance will ensure the longevity and optimal performance of your Hiwill Nimbus A512 soundbar system.
- Cleaning: Use a soft, dry cloth to clean the surfaces of the soundbar, subwoofer, and speakers. Do not use liquid cleaners, aerosols, or abrasive materials, as these can damage the finish or internal components.
- Ventilation: Ensure that all ventilation openings remain clear and unobstructed to prevent overheating.
- Environment: Avoid placing the system in direct sunlight, near heat sources, or in areas with high humidity or dust.
- Cable Management: Keep cables tidy and free from kinks or excessive bending to prevent damage.
7. Troubleshooting
If you encounter issues with your Hiwill Nimbus A512 system, refer to the following common problems and solutions.
| Problem | Possible Cause | Solution |
|---|---|---|
| No sound from soundbar. |
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| No sound from subwoofer. |
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| No sound from rear speakers. |
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| Remote control not working. |
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| Sound distortion or poor quality. |
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7.1 Firmware Updates
Hiwill provides continuous firmware updates to improve performance, resolve issues, and introduce new features. For the latest firmware version and update instructions, please contact Hiwill customer support directly.

8. Specifications
| Feature | Detail |
|---|---|
| Model Name | Nimbus A512 |
| Brand | Hiwill |
| Sound Channel Configuration | 5.1.2 Channel |
| Audio Output Mode | Dolby Atmos |
| Total Speaker Drivers | 11 (4 front, 2 rear, 2 side, 2 up-firing) |
| Subwoofer Size | 6.5 inches (Wireless) |
| Max Speaker Output Power | 450 Watts |
| Frequency Response | Up to 20 KHz (System optimized for full range) |
| Wireless Communication Technology | Bluetooth 5.3 |
| Connectivity Options | HDMI ARC, Optical, USB, Auxiliary, Bluetooth 5.3 |
| Compatible Devices | MP3 Player, Laptop, Smartphone, Tablet, Television |
| Control Method | Remote Control |
| Soundbar Dimensions (L x D x H) | 43 x 11.3 x 6 cm (approximate) |
| Total Weight | 7.78 kg (approximate, package weight) |
| Mounting Type | Table Mount, Wall Mount (kit included) |
| Waterproof | No |
8.1 Speaker Components
- Neodymium-Iron-Boron (NdFeB) Magnets: Used for reduced distortion and precise signal transmission.
- Aluminum-Magnesium Diaphragms: Lightweight, enhancing sensitivity and clarity while minimizing distortion.
- Copper Rings: Optimize frequency response and reduce electromagnetic interference.




9. Warranty and Support
9.1 Warranty Information
The Hiwill Nimbus A512 Soundbar System comes with an extended warranty. For specific terms and conditions, please refer to the warranty card included in your package or contact Hiwill customer service.
9.2 Customer Support
For technical assistance, warranty claims, or inquiries regarding firmware updates, please contact Hiwill customer support.
- Firmware Updates: As mentioned in the troubleshooting section, Hiwill regularly releases firmware updates. Please contact us directly to obtain the latest version and instructions.
- Contact Information: Refer to the product packaging or the official Hiwill website for the most up-to-date contact details.





