1. Product Overview
The Herdio HMA-BTB01 is a compact Bluetooth audio amplifier designed to connect Bluetooth-enabled devices to low impedance speakers. It features a built-in power amplifier and an auxiliary input for wired connections. Its small size makes it suitable for installation in various spaces, including ceiling voids.


2. Package Contents
Ensure all items are present and in good condition upon unpacking:
- 1 x Herdio HMA-BTB01 Bluetooth & Aux Mini Amplifier
- 1 x 12V Power Supply Unit (PSU) with regional plug (EU/US/UK/AU plug, as selected)

3. Setup Instructions
Follow these steps to set up your Herdio HMA-BTB01 amplifier:
3.1 Placement
- Install the Bluetooth amplifier in a dry location, such as a loft space or within a wall cavity. Avoid areas with high humidity or direct exposure to water.
3.2 Wiring Diagram

3.3 Connecting Speakers
The amplifier supports up to 4 speakers (4 or 8 Ohms). Connect your passive speakers to the screw terminals:
- SPK L+ / SPK L-: For Left Channel Speaker
- SPK R+ / SPK R-: For Right Channel Speaker
3.4 Connecting Power
Connect the supplied 12V PSU to the 'Power Jack' input on the amplifier. Ensure the correct regional plug is used.
3.5 Auxiliary Input
For wired audio sources, connect a 3.5mm audio cable from your device to the 'AUX IN' jack on the amplifier.
3.6 TWS Switch
The TWS (True Wireless Sound) switch is located on the side of the amplifier. This switch is used when pairing two amplifiers together for a true stereo surround sound experience. Ensure the TWS switch is in the 'ON' position on both amplifiers before attempting to pair them.
4. Operating Instructions
4.1 Bluetooth Connection
To connect your device via Bluetooth:
- Ensure the amplifier is powered on.
- On your Bluetooth-enabled device (smartphone, tablet, etc.), search for available Bluetooth devices.
- Select the device named "Herdio" from the list. No password is required for connection.
- Once connected, audio from your device will play through the speakers.
The Bluetooth connection has a range of up to 50 feet (approximately 15 meters).

4.2 Auxiliary Input Usage
If you prefer a wired connection or your device does not have Bluetooth, connect it using a 3.5mm audio cable to the 'AUX IN' port. The amplifier will automatically switch to the auxiliary input when a signal is detected.
4.3 TWS (True Wireless Sound) Pairing
To achieve true stereo sound with two Herdio HMA-BTB01 amplifiers:
- Ensure both amplifiers are powered on and their TWS switches are set to 'ON'.
- Pair your Bluetooth device to one of the amplifiers. This amplifier will act as the master unit.
- The two amplifiers will automatically pair with each other, creating a stereo pair.
4.4 Compatibility
The Herdio HMA-BTB01 amplifier is compatible with various devices, including Amazon Alexa and Echo products, allowing for seamless integration into smart home audio setups.
5. Maintenance
To ensure the longevity and optimal performance of your amplifier:
- Keep the unit in a dry environment. Avoid exposure to moisture, rain, or extreme temperatures.
- Clean the exterior with a soft, dry cloth. Do not use harsh chemicals or abrasive cleaners.
- Ensure proper ventilation around the unit to prevent overheating.
6. Troubleshooting
- No Sound Output:
- Check if the amplifier is powered on and the power adapter is securely connected.
- Verify speaker connections are correct (SPK L+/-, SPK R+/-).
- Ensure your audio source (Bluetooth device or Aux cable) is properly connected and playing audio.
- Check the volume level on both your audio source and the amplifier.
- Bluetooth Pairing Issues:
- Ensure the amplifier is within the 50-foot Bluetooth range of your device.
- Confirm the Bluetooth name "Herdio" appears on your device's scan list. No password is required.
- If using TWS, ensure both amplifiers have the TWS switch 'ON' before pairing your device to one of them.
- Amplifier makes noise when Bluetooth disconnects:
- This is normal behavior. When a Bluetooth device disconnects, the amplifier may emit a sound as it enters a search mode for new connections.
7. Specifications
| Feature | Specification |
|---|---|
| Brand Name | Herdio |
| Model Number | HMA-BTB01 |
| Channels | 4 |
| Maximum Power Per Channel | 6W |
| Total Speaker Output | Up to 4 x 80W (at 4 or 8 Ohms) |
| Bluetooth Version | 4.2 |
| Bluetooth Name | Herdio |
| Bluetooth Range | Up to 50 feet (15 meters) |
| Input Options | Bluetooth, AUX IN (3.5mm Jack) |
| Power Supply | 12V PSU (Supplied) |
| Plug Specifications | EU/US/UK/AU (as selected) |
| Material | Plastics |
| Color | Black |
| Weight | 0.5 kg |
| Certification | CE |
| Origin | Mainland China |
8. User Tips
- For a true stereo experience, utilize the TWS function by pairing two Herdio amplifiers. Remember to turn on the TWS switch on both units before pairing.
- The Bluetooth connection does not require a password, simply select "Herdio" from your device's Bluetooth list.
- Always ensure the amplifier is installed in a dry, well-ventilated area to prevent damage and ensure optimal performance.
9. Warranty and Support
For any issues or support inquiries, please contact your retailer or the Herdio customer service. Keep your purchase receipt for warranty claims.





