1. Introduction
This manual provides comprehensive instructions for the Naxa NDS-6501 Portable Dual 6.5-inch Bluetooth Speaker. Please read this manual thoroughly before operating the device to ensure proper use and to maximize your experience. Keep this manual for future reference.
2. Package Contents
Verify that all items listed below are included in your package:
- Naxa NDS-6501 Portable Bluetooth Speaker
- Wired Microphone
- USB Charging Cable
- User Manual (this document)
3. Product Features
The Naxa NDS-6501 speaker offers a range of functionalities designed for portable audio entertainment:
- Dual 6.5-inch full-frequency speakers for clear audio output.
- Bluetooth connectivity for wireless audio streaming from compatible devices.
- Integrated multi-color flame lights with various lighting effects.
- True Wireless Stereo (TWS) function for connecting two NDS-6501 speakers wirelessly.
- Wired microphone input for vocal use.
- Built-in FM radio tuner for local station access.
- USB port and MicroSD/TF card slot for playing audio files from external storage.
- Auxiliary (3.5mm) input for wired audio connections.
- Rechargeable battery providing up to 2 hours of playback time.
4. Controls and Ports
The speaker features various controls and input/output ports. A typical layout includes a power button, volume controls, mode selection, playback controls (play/pause, skip tracks), microphone input, USB port, MicroSD card slot, auxiliary input, and a charging port. Refer to the diagram below for specific locations.

Figure 4.1: Front view of the Naxa NDS-6501 speaker, showcasing the dual 6.5-inch drivers and multi-color flame lights.

Figure 4.2: Side view of the Naxa NDS-6501 speaker, illustrating its portable design with an integrated handle.
5. Setup
5.1 Charging the Speaker
- Connect the supplied USB charging cable to the speaker's charging port.
- Connect the other end of the USB cable to a compatible USB power adapter (not included) or a computer's USB port.
- The charging indicator light will illuminate, typically red, during charging.
- Once fully charged, the indicator light will change color or turn off (refer to specific LED behavior in your product). A full charge provides approximately 2 hours of playback.
5.2 Powering On/Off
- To power on: Press and hold the Power button for a few seconds until the speaker activates.
- To power off: Press and hold the Power button again until the speaker shuts down.
6. Operating Instructions
6.1 Bluetooth Pairing
- Ensure the speaker is powered on and in Bluetooth mode. If not, press the Mode button to switch to Bluetooth. The speaker will indicate it is ready for pairing (e.g., a flashing LED or an audible prompt).
- On your Bluetooth-enabled device (smartphone, tablet, etc.), go to the Bluetooth settings.
- Search for available devices. You should see "NDS-6501" or a similar name in the list.
- Select "NDS-6501" to initiate pairing.
- Once successfully paired, the speaker will provide an audible confirmation, and the Bluetooth indicator light will become solid.
6.2 True Wireless Stereo (TWS) Pairing
The TWS function allows you to connect two NDS-6501 speakers for a stereo sound experience.

Figure 6.1: Illustration of the True Wireless Stereo (TWS) function, enabling two speakers to connect wirelessly from a single Bluetooth source.
- Ensure both NDS-6501 speakers are powered on and in Bluetooth mode, but not yet paired to any device.
- On one of the speakers (this will be the primary speaker), press and hold the TWS button (or a designated pairing button) for a few seconds.
- The primary speaker will search for the secondary speaker. Once connected, both speakers will provide an audible confirmation.
- Now, pair your Bluetooth device to the primary speaker as described in Section 6.1. Audio will play through both speakers in stereo.
6.3 FM Radio Operation
- Press the Mode button to switch to FM Radio mode.
- Press the Play/Pause button to automatically scan and save available FM stations.
- Use the Previous/Next track buttons to navigate between saved stations.
6.4 USB/MicroSD Playback
- Insert a USB flash drive or a MicroSD/TF card (with audio files) into the corresponding port.
- The speaker should automatically switch to USB or MicroSD mode and begin playing audio. If not, press the Mode button to select the correct input.
- Use the playback controls (Play/Pause, Previous/Next) to manage your music.
6.5 Microphone Use
- Connect the wired microphone to the microphone input jack on the speaker.
- Adjust the microphone volume control (if available) on the speaker to your desired level.
- The microphone audio will be mixed with any music playing through the speaker.
6.6 Lighting Effects
- The speaker features integrated multi-color flame lights.
- Press the Light button (if available) to cycle through different lighting modes or to turn the lights on/off.
- The lights may synchronize with the music playback.
7. Maintenance
- Cleaning: Use a soft, dry cloth to clean the speaker's exterior. Do not use abrasive cleaners, waxes, or solvents.
- Storage: When not in use for extended periods, store the speaker in a cool, dry place away from direct sunlight and extreme temperatures.
- Battery Care: To prolong battery life, avoid fully discharging the battery frequently. Charge the speaker regularly, even if not in use.
- Water Exposure: This speaker is not waterproof. Avoid exposing it to water or excessive moisture.
8. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Speaker does not power on. | Battery is depleted. | Charge the speaker using the provided USB cable. |
| No sound from speaker. | Volume is too low; incorrect input mode; device not paired. | Increase volume; press Mode button to select correct input; re-pair Bluetooth device. |
| Bluetooth device cannot find speaker. | Speaker not in pairing mode; device too far; interference. | Ensure speaker is in Bluetooth pairing mode; move device closer; avoid obstacles. |
| TWS pairing fails. | Speakers already paired to a device; too far apart. | Ensure both speakers are unpaired from other devices; place speakers within 33 feet of each other. |
| Microphone not working. | Microphone not fully plugged in; microphone volume low. | Ensure microphone is securely connected; adjust microphone volume. |
9. Specifications
| Feature | Specification |
|---|---|
| Model Number | NDS-6501 |
| Speaker Size | Dual 6.5 inches |
| Connectivity Technology | Bluetooth, USB, MicroSD, Aux (3.5mm) |
| Audio Input | Wired Microphone |
| Audio Output Mode | Stereo |
| Maximum Output Power | 3 Watts |
| Speaker Amplification Type | Active |
| Battery Type | Lithium Ion (rechargeable, included) |
| Battery Average Life | Up to 2 Hours |
| Product Dimensions (L x W x H) | 24.13 x 19.05 x 57.91 cm (9.5 x 7.5 x 22.8 inches) |
| Item Weight | 2.81 kg (6.2 lbs) |
| Color | Black |
| UPC | 840005017555 |
10. Warranty and Support
For warranty information or technical support, please refer to the warranty card included with your product or visit the official Naxa Electronics website. Keep your purchase receipt as proof of purchase for any warranty claims.





