1. Introduction
Thank you for choosing the Canton Smart SUB 8 active subwoofer. This manual provides essential information for the safe and efficient operation of your new audio device. Please read this manual thoroughly before using the product and retain it for future reference.
The Canton Smart SUB 8 is a powerful 200-watt subwoofer designed to enhance the low-frequency performance of your audio system, delivering deep and impactful bass.

Figure 1: Front view of the Canton Smart SUB 8 subwoofer, showcasing its sleek, minimalist design.
2. Safety Instructions
To ensure safe operation and prevent damage, observe the following safety guidelines:
- Power Supply: Connect the subwoofer only to an AC power outlet that matches the voltage specified on the unit (100-120V or 220-240V).
- Ventilation: Ensure adequate ventilation around the unit. Do not block ventilation openings. Maintain a minimum distance of 10 cm (4 inches) from walls or other objects.
- Liquids: Do not expose the unit to dripping or splashing liquids. Do not place objects filled with liquids, such as vases, on the unit.
- Heat: Keep the unit away from heat sources such as radiators, heat registers, stoves, or other apparatus (including amplifiers) that produce heat.
- Cleaning: Unplug the unit from the power outlet before cleaning. Use only a dry, soft cloth.
- Servicing: Do not attempt to service this product yourself. Refer all servicing to qualified service personnel.
- Placement: Place the subwoofer on a stable, level surface to prevent it from tipping over.
3. Package Contents
Please check that all items are present in the package:
- Canton Smart SUB 8 Subwoofer
- Power Cable
- User Manual (this document)
If any items are missing or damaged, please contact your retailer.
4. Setup
4.1 Placement
The placement of your subwoofer significantly impacts its sound performance. Experiment with different locations to find the best bass response for your room. Generally, placing the subwoofer in a corner or near a wall can enhance bass output.

Figure 2: The Canton Smart SUB 8 integrated into a home entertainment setup, demonstrating a typical placement scenario.
4.2 Connections
The rear panel of the Smart SUB 8 provides all necessary connections. Refer to Figure 3 for a visual guide.

Figure 3: Rear panel of the Canton Smart SUB 8, detailing the input and power connections.
- Wired Connection:
- Ensure your audio receiver or amplifier is turned off.
- Connect an RCA subwoofer cable (not included) from the 'SUB OUT' or 'LFE OUT' jack on your receiver/amplifier to the 'SUB IN' (RCA) input on the Canton Smart SUB 8.
- Set the 'SUB IN MODE' switch to 'WIRED'.
- Wireless Connection:
- Set the 'SUB IN MODE' switch to 'WIRELESS'.
- Press the 'WIRELESS PAIRING BUTTON' on the rear panel. The LED indicator on the front of the subwoofer will flash, indicating pairing mode.
- Follow the pairing instructions for your Canton Smart series main unit (e.g., soundbar or speaker system) to establish a wireless connection.
- Power Connection:
- Connect the supplied power cable to the 'POWER INPUT' on the rear panel of the subwoofer.
- Plug the other end of the power cable into a suitable wall outlet.
4.3 Initial Power On
After making all connections, turn on your audio receiver/amplifier and then the Canton Smart SUB 8. The LED indicator on the front of the subwoofer will illuminate (typically red for standby, green for active) to indicate its status.
5. Operating
5.1 Power On/Off
The Canton Smart SUB 8 features an automatic standby function. It will power on automatically when an audio signal is detected and enter standby mode after a period of inactivity. You can also manually power it off by disconnecting the power cable.
5.2 Volume Control
The bass level of the Smart SUB 8 is primarily controlled through your connected audio receiver, amplifier, or Canton Smart series main unit. Adjust the subwoofer level setting on your main audio device to achieve the desired bass output.
5.3 Wireless Pairing (if applicable)
If you are using the subwoofer in wireless mode, ensure it is successfully paired with your Canton Smart series main unit. If the connection is lost or needs to be re-established, follow the pairing procedure outlined in Section 4.2.
6. Maintenance
Proper maintenance ensures the longevity and performance of your Canton Smart SUB 8:
- Cleaning: Use a soft, dry, lint-free cloth to clean the exterior surfaces of the subwoofer. Do not use liquid cleaners, aerosols, or abrasive chemicals, as they may damage the finish.
- Ventilation: Regularly check that the ventilation openings are not obstructed by dust or debris.
- Handling: Avoid dropping or subjecting the subwoofer to strong impacts.
7. Troubleshooting
If you encounter issues with your Canton Smart SUB 8, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| No power / LED off | Power cable disconnected; Power outlet faulty. | Check power cable connection; Try a different power outlet. |
| No sound from subwoofer | Incorrect input selection; Volume too low; Cable faulty; Wireless pairing lost. | Ensure 'SUB IN MODE' is correct; Increase volume on main unit; Check RCA cable; Re-pair wirelessly. |
| Distorted or unclear bass | Volume too high; Improper placement; Source audio quality. | Reduce subwoofer volume; Adjust placement; Check source audio. |
| Humming or buzzing noise | Ground loop; Loose cable connection; Interference. | Try plugging into a different outlet; Ensure all cables are secure; Move away from other electronic devices. |
If the problem persists after trying these solutions, please contact qualified service personnel.
8. Specifications
Technical specifications for the Canton Smart SUB 8:
- Brand: Canton
- Model Number: 3997
- Type: Active Subwoofer
- Power Output (Max): 200 Watts
- Frequency Response: 27 Hz - 150 Hz
- Dimensions (L x W x H): 27 cm x 27 cm x 33 cm (10.6 x 10.6 x 13 inches)
- Weight: 10.74 kg (23.68 lbs)
- Supply Voltage: 100-120V / 220-240V (selectable/auto-sensing)
- Surround Sound Channel Configuration: 1.0
- Compatible Devices: Laptop, Tablet, Smartphone (as audio source)
9. Warranty and Support
The Canton Smart SUB 8 comes with a manufacturer's warranty. Please refer to the warranty card or documentation included with your purchase for specific terms and conditions, including warranty period and coverage.
For technical support, service, or inquiries regarding your product, please contact your authorized Canton dealer or visit the official Canton website for contact information in your region. When contacting support, please have your model number (3997) and purchase details ready.





