1. Introduction
Thank you for choosing Herdio 8 Inch 400 Watts High Power Ceiling Speakers. These speakers are designed to deliver crisp, immersive audio for various environments, including home theaters, living rooms, offices, kitchens, and covered patios. Their flush-mount design ensures seamless integration into any ceiling decor.
Key Features:
- 400 Watts High Power & Crisp Stereo Sound: Experience immersive, room-filling audio with 800 watts of peak power, delivering clear highs, balanced mids, and rich bass.
- Flush Mount Design: Seamlessly blends with any ceiling decor, saving space and maintaining an unobtrusive look.
- Multi-Scene Versatility: Ideal for various indoor and covered outdoor spaces.
- Durable Construction & Easy Installation: Crafted with high-quality materials for long-lasting performance and designed for simple, hassle-free installation.
2. Package Contents
Please check the box for the following items:
- 2 x Herdio 8-inch Ceiling Speakers
- 2 x Speaker Cables (5 meters each)
- 1 x Cutout Template
- 1 x User Manual

Image: Package contents showing two passive speakers, two 5-meter speaker cables, and a packaging box.
3. Safety Information
- Read all instructions carefully before installation and use.
- Retain this manual for future reference.
- Do not expose speakers to water or moisture.
- Ensure proper wiring to avoid electrical hazards.
- Always disconnect power before performing any installation or maintenance.
- Consult a qualified electrician if you are unsure about wiring connections.
4. Setup and Installation
These speakers are designed for easy flush mounting in ceilings or walls. Follow these steps for proper installation:
4.1. Planning and Preparation
- Choose a suitable location in your ceiling or wall, avoiding studs, joists, or electrical wiring.
- Ensure there is sufficient clear space behind the mounting surface for the speaker depth (approximately 9cm / 3.54 inches).
- Use the provided cutout template to mark the exact cutting area.
4.2. Mounting the Speakers
- Remove the Speaker Grill: Gently pry off the magnetic speaker grill using a small flat-head screwdriver or a thin tool.
- Cut the Mounting Hole: Using the cutout template, carefully cut a circular hole in the ceiling or wall. The recommended cut-out diameter is 8.07 inches (20.5 cm).
- Connect Speaker Wires: Run speaker wires from your amplifier to the mounting location. Connect the positive (+) wire (red) to the red terminal and the negative (-) wire (black) to the black terminal on the speaker. Ensure a secure connection.
- Insert and Secure the Speaker: Carefully insert the speaker into the cutout hole. The spring-loaded mounting clips will automatically engage and secure the speaker to the mounting surface.
- Reattach the Grill: Once the speaker is securely mounted, reattach the magnetic grill.

Image: Illustration of removing the speaker grill.

Image: Close-up of spring-loaded speaker terminals for wire connection.

Image: Speaker showing the mounting clips and internal components before final installation.
4.3. Wiring Diagram (Example with Amplifier)
These are passive speakers and require an external amplifier for operation. Below is a general wiring example:

Image: A diagram illustrating how to connect two in-ceiling speakers to a 2-channel Bluetooth amplifier. Note: Amplifier and power adapter are not included with these passive speakers.
4.4. Installation Videos
Video: This video demonstrates the features, general installation process, and various applications of in-ceiling speakers. It provides a visual guide to understanding the product and its setup.
Video: A detailed guide on how to install 8-inch speakers, covering the practical steps for mounting and securing them in a ceiling or wall.
5. Operating Instructions
Once the speakers are installed and properly wired to an external amplifier (not included), you can begin enjoying your audio. Refer to your amplifier's manual for specific operating instructions.
5.1. Basic Usage
- Turn on your amplifier and select the appropriate input source.
- Adjust the volume on your amplifier to your desired listening level.
- For optimal sound, ensure your amplifier's settings (e.g., bass, treble, balance) are configured to your preference.
5.2. Product Details

Image: Detailed view of the speaker's internal components, highlighting the 8-inch dynamic balance woofer for detailed sound and a 1-inch aimable soft-dome tweeter for depth and detail in music. A rubber seal prevents moisture access.
6. Maintenance
- Cleaning: Use a soft, dry cloth to clean the speaker grills and surrounding areas. Do not use harsh chemicals or abrasive cleaners.
- Inspection: Periodically check speaker connections for any loose wires or damage.
- Environment: Avoid exposing speakers to extreme temperatures or direct sunlight for prolonged periods.
7. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No sound from speakers | Loose wiring; Amplifier off; Incorrect input selected | Check all speaker wire connections; Ensure amplifier is powered on; Select correct input source on amplifier. |
| Distorted sound | Volume too high; Loose connections; Damaged speaker | Reduce amplifier volume; Check all wiring; Inspect speaker for physical damage. |
| Uneven sound levels | Amplifier balance settings; Incorrect wiring | Adjust amplifier balance settings; Verify correct positive/negative wiring for each speaker. |
8. Specifications

Image: Product dimensions for the 8-inch ceiling speaker.
| Feature | Detail |
|---|---|
| Model Name | HE-HCS-828PRS |
| Speaker Type | In-Ceiling |
| Speaker Size | 8 Inches |
| Speaker Maximum Output Power | 400 Watts |
| Connectivity Technology | Wired |
| Mounting Type | Speaker (Flush Mount) |
| Product Dimensions | 10"D x 10"W x 9"H |
| Item Weight | 6.09 pounds |
| Color | White |
| Recommended Uses | Indoor/Outdoor (Covered Patio) |
9. Warranty and Support
For warranty information and customer support, please refer to the documentation included with your purchase or visit the official Herdio website. Keep your proof of purchase for any warranty claims.





