1. Introduction
This manual provides detailed instructions for the installation, operation, and maintenance of your Herdio 5.25” Flush Mount Bluetooth Ceiling Speaker System. This system is designed to deliver high-quality audio in various indoor and covered outdoor environments, including kitchens, bedrooms, bathrooms, and home theaters. It features advanced Bluetooth 5.0 connectivity for stable pairing and a TWS function for true surround sound with multiple speakers.
Please read this manual thoroughly before installation and use to ensure proper function and longevity of your speakers.
2. Setup and Installation
2.1 Package Contents
Before beginning installation, verify that all components are present in the package:
- Herdio HCS528 speakers x 4
- Speaker Connection Wires x 4
- Amplifier Box x 1
- Power adapter X 1

Figure 2.1: Package Contents Overview
This image displays all items included in the Herdio 5.25 inch flush mount Bluetooth ceiling speaker system package, including the four speakers, their connection wires, the amplifier box, and the power adapter, laid out neatly for inspection.
2.2 Speaker Dimensions and Cut-Out
Ensure adequate space and proper cut-out dimensions for flush mounting.
- Total Speaker Diameter: 8.46 Inches (21.5 CM)
- Cut-Out Diameter: 7.3 Inches (18.5 CM)
- Mounting Depth: 4.33 Inches (11 CM)

Figure 2.2: Installation Dimensions
This diagram illustrates the precise measurements required for installing the Herdio ceiling speaker, detailing the overall speaker diameter, the necessary cut-out size for the mounting hole, and the depth required within the ceiling or wall cavity.
2.3 Installation Steps
Follow these steps for proper installation:
- Prepare the Opening: Using the specified cut-out diameter (7.3 inches / 18.5 CM), create a circular opening in your ceiling or wall. Ensure the mounting depth (4.33 inches / 11 CM) is available.
- Connect Wiring: Connect the speaker wires from the amplifier box to the speaker terminals. Ensure correct polarity (+ to + and - to -).
- Insert Speaker: Carefully insert the speaker into the prepared opening.
- Secure Speaker: The flush mount design features integrated mounting clamps. Tighten the screws on the speaker frame to engage these clamps, securing the speaker firmly in place. Do not overtighten to avoid damaging the drywall or mounting surface.
- Attach Grille: Once the speaker is secured, attach the removable magnetic grille to the speaker frame.

Figure 2.3: Easy Installation Process
This image illustrates the straightforward installation of the Herdio ceiling speaker, highlighting how the speaker is inserted into the ceiling and secured using its integrated mounting clamps, emphasizing the ease of the process.

Figure 2.4: Removable Grille
This image provides a detailed view of the Herdio ceiling speaker, showcasing its removable grille and the speaker components, including the woofer and coaxial tweeter, located beneath it.
2.4 Wiring Diagram
Proper wiring is crucial for optimal performance. Connect the speakers to the amplifier box as shown in the diagram below, paying close attention to positive (+) and negative (-) terminals.

Figure 2.5: Speaker Wiring Terminals
This image provides a detailed view of the speaker's wiring terminals, clearly indicating the positive (red) and negative (black) connection points for proper audio signal transmission.

Figure 2.6: System Wiring Diagram
This diagram illustrates the complete wiring setup, showing how four ceiling speakers are connected to the central Herdio amplifier box using speaker wires, and how a smartphone wirelessly connects to the amplifier via Bluetooth to stream audio.
3. Operating Instructions
3.1 Powering On and Off
Long press the power button on the amplifier box to turn the system on or off.
3.2 Bluetooth Pairing
The Herdio speaker system utilizes advanced Bluetooth 5.0 for stable and instant pairing.
- Ensure the amplifier box is powered on.
- On your Bluetooth-enabled device (e.g., smartphone, tablet), search for available Bluetooth devices.
- Select "Herdio" or the corresponding device name from the list to pair.
- Once paired, you will hear a confirmation sound, and the Bluetooth indicator light on the amplifier box will illuminate.
The system maintains a strong connection up to 100 feet (30 meters) unobstructed from your device.

Figure 3.1: Bluetooth Connectivity
This diagram illustrates the wireless Bluetooth connection between a smartphone and the Herdio amplifier box, which then transmits audio to the four connected ceiling speakers, enabling seamless music streaming.
3.3 True Wireless Stereo (TWS) Function
The TWS function allows you to pair multiple Herdio speaker systems for a powerful true surround sound experience.
- Turn on both the HOST speaker system and the SUB speaker system.
- The HOST and SUB speaker systems will automatically link with each other within 6 seconds.
- Once linked, pair your Bluetooth device to the HOST speaker system as described in Section 3.2.
3.4 Amplifier Box Controls
The amplifier box features intuitive controls for managing your audio playback:

Figure 3.2: Amplifier Box Controls
This diagram details the control panel of the Herdio amplifier box, labeling each button and its corresponding function for easy operation of the speaker system.
- Power / Play/Pause Button: Long press to power on/off; Short press to play/pause audio.
- Mode Switch Button: Long press to reset; Short press to switch between BT (Bluetooth), USB, AUX, and Mic modes.
- Volume Down / TWS Button: Press briefly to decrease the volume; Press and hold to open TWS mode.
- Volume Up / Mono/Stereo Button: Press briefly to increase the volume; Long press to switch between mono and stereo output.
- Previous Song / Rewind Button: Short press for the previous song; Press and hold to rewind.
- Next Song / Fast Forward Button: Short press for the next song; Long press to fast forward.
3.5 Auxiliary Input
For connecting devices without Bluetooth, use the 3.5mm AUX in jack on the amplifier box.
4. Maintenance
To ensure the longevity and optimal performance of your Herdio ceiling speakers, follow these maintenance guidelines:
- Cleaning: Gently wipe the speaker grilles and frames with a soft, dry cloth. Avoid using abrasive cleaners, solvents, or excessive moisture, as the speakers are not waterproof.
- Environment: While suitable for humid indoor and covered outdoor areas, avoid direct exposure to water, rain, or extreme temperatures.
- Grille Removal: If necessary for cleaning or inspection, the grilles can be carefully removed. Reattach securely after maintenance.
- Wiring Inspection: Periodically check all wiring connections to ensure they are secure and free from damage.
5. Troubleshooting
If you encounter issues with your Herdio speaker system, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| No sound from speakers. |
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| Bluetooth connection drops frequently or fails to reconnect. |
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| Sound quality is poor (e.g., missing bass). |
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6. Specifications
| Feature | Detail |
|---|---|
| Brand | Herdio |
| Model Name | HCS528-16BT-4CH |
| Item Model Number | HCS528BT |
| Mounting Type | Ceiling Mount |
| Material | Acrylonitrile Butadiene Styrene (ABS) |
| Speaker Type | Multi Room |
| Special Feature | Multi Room Audio |
| Recommended Uses | Home Theater, Kitchen, Indoor, Covered Outdoor |
| Compatible Devices | Smartphone |
| Speaker Size | 5.25 Inches |
| Subwoofer Diameter | 5.25 Inches |
| Woofer Diameter | 5.25 Inches |
| Audio Driver Type | Dynamic Driver |
| Audio Driver Size | 13.3 Centimeters |
| Speaker Maximum Output Power | 600 Watts |
| Connectivity Technology | Bluetooth |
| Wireless Communication Technology | Bluetooth |
| Bluetooth Range | 100 Feet (30 Meters) |
| Control Method | Touch |
| Power Source | Corded Electric |
| Input Voltage | 5 Volts |
| Audio Output Mode | Surround |
| Surround Sound Channel Configuration | 4.2 |
| Number of Items | 4 (speakers) |
| Color | White |
| Product Dimensions (D x W x H) | 4.33"D x 8.46"W x 8.46"H |
| Item Weight | 14.3 pounds (6.5 Kilograms) |
| Is Waterproof | FALSE |
7. Warranty Information
This Herdio product comes with a Limited Warranty. For specific details regarding the terms and conditions of your warranty, including coverage duration and claims process, please refer to the warranty card included with your product or visit the official Herdio website.
8. Customer Support
For further assistance, technical support, or inquiries regarding your Herdio 5.25” Flush Mount Bluetooth Ceiling Speaker System, please contact Herdio customer support through their official channels. You may find contact information on the Herdio website or in the documentation provided with your product.
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