Introduction
Thank you for choosing the BESTISAN SW65D 6.5-inch Powered Home Audio Subwoofer. This manual provides essential information for the proper setup, operation, and maintenance of your new subwoofer. Please read it thoroughly before use to ensure optimal performance and longevity of the product.
Safety Information
- Do not expose the subwoofer to rain, moisture, or extreme temperatures.
- Ensure proper ventilation around the unit to prevent overheating.
- Avoid placing the subwoofer near heat sources or in direct sunlight.
- Do not open the casing; refer all servicing to qualified personnel.
- Keep out of reach of children and pets.
Package Contents
Verify that all items listed below are included in your package:
- BESTISAN SW65D Subwoofer
- Quick Start Guide
- Stereo RCA to 3.5mm Audio Cable
- Power Adapter

Figure 1: Included Package Contents
Product Overview
The BESTISAN SW65D is a compact 6.5-inch powered subwoofer designed to enhance your home audio experience with deep, rich bass. Its sleek design allows for flexible placement within your living space.

Figure 2: Front View of the BESTISAN SW65D Subwoofer

Figure 3: Subwoofer Dimensions (12.6"D x 6.3"W x 12.6"H)
Setup
The BESTISAN SW65D subwoofer is designed for easy integration into various home audio systems, including receivers, soundbars, and bookshelf speakers. Follow these steps for a straightforward setup:
- Placement: Position the subwoofer in your desired location. Its compact size allows for placement in various spots, including next to furniture or in corners.
- Connection: Connect the provided RCA cable from the 'Subwoofer Out' (or LFE output) port on your receiver, soundbar, or bookshelf speakers to the 'LFE Input' RCA port on the subwoofer.
- Power: Connect the power adapter to the subwoofer's power input and then plug it into a wall outlet.
- Power On: Turn on the subwoofer using the power switch.

Figure 4: Easy Integration with Various Audio Systems

Figure 5: Rear Panel Connections for Easy Setup
Operating Instructions
Once connected and powered on, you can fine-tune the subwoofer's performance to match your room acoustics and personal preferences using the controls on the unit.
- Volume Control: Adjust the overall output level of the subwoofer. Start with a moderate setting and increase gradually until the bass blends seamlessly with your main speakers.
- Low Pass Filter (Crossover Frequency): This control determines the highest frequency the subwoofer will reproduce. Adjust it to match the low-frequency capabilities of your main speakers. A common starting point is around 80-100 Hz.
- Phase Control: If available, this control (0 or 180 degrees) helps ensure that the subwoofer's sound waves are in sync with your main speakers, preventing cancellation or reinforcement issues. Experiment with both settings to find the one that produces the most impactful and coherent bass.
For optimal sound, adjust the subwoofer's volume and low pass filter to approximately 50% initially, then fine-tune while listening to various audio content.
Maintenance
To ensure your BESTISAN SW65D subwoofer remains in excellent condition, follow these simple maintenance guidelines:
- Cleaning: Use a soft, dry cloth to wipe the exterior of the subwoofer. Avoid using abrasive cleaners, waxes, or solvents.
- Dust: Regularly dust the unit to prevent accumulation, especially around the speaker grille and vents.
- Ventilation: Ensure that the subwoofer's vents are not blocked to maintain proper airflow and prevent overheating.
- Storage: If storing the subwoofer for an extended period, disconnect it from power and store it in a cool, dry place, ideally in its original packaging.
Troubleshooting
If you encounter issues with your BESTISAN SW65D subwoofer, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| No sound from subwoofer |
|
|
| Distorted or muddy bass |
|
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| Humming or buzzing noise |
|
|
Specifications
Detailed technical specifications for the BESTISAN SW65D subwoofer:
- Subwoofer Driver: 6.5 Inches
- Cabinet Type: Bass Reflex with a Down Firing Port
- Speaker Maximum Output Power: 60 Watts
- Frequency Response: 35-200 Hz
- Crossover Frequency: 60Hz-160Hz
- Variable Phase Control: 0 or 180 degrees
- Inputs: RCA, LFE, and Speakers Level
- Connectivity Technology: Auxiliary, RCA, Bluetooth (for some models)
- Product Dimensions: 12.6"D x 6.3"W x 12.6"H
- Item Weight: 9.15 Pounds
- Material: Plastic
- Color: Black
- Model Name: SW65D
- UPC: 784135668440

Figure 6: Key Product Specifications
Warranty and Support
The BESTISAN SW65D subwoofer comes with a limited warranty. For specific warranty terms and conditions, please refer to the warranty card included with your product or visit the official BESTISAN website. For technical support, troubleshooting assistance, or service inquiries, please contact BESTISAN customer support through their official channels.





