Model: HMH-616BT
Thank you for choosing Herdio 4-inch Heavy Duty Waterproof Marine Bluetooth Speakers. These speakers are designed for robust performance in various outdoor and marine environments, including boats, campers, ATVs, UTVs, RZRs, golf carts, and tractors. Featuring Bluetooth 5.0 connectivity and a durable, waterproof design, they provide high-fidelity audio wherever your adventures take you.
Carefully unpack the box and ensure all items are present:

Image: All components included in the Herdio speaker package, laid out for clear identification.

Image: The Herdio 4-inch Marine Bluetooth Speakers and their accompanying amplifier box.
The Herdio speakers are designed for surface mounting. Choose a secure location on your boat, ATV, UTV, golf cart, or other vehicle that allows for optimal sound dispersion and secure attachment. Ensure the mounting surface is flat and strong enough to support the speakers.

Image: Detailed product dimensions for accurate mounting and placement.
The speakers connect to the independent digital Bluetooth amplifier box, which then requires a 12V DC power source. For home use, a 12V 3A power adapter (not included) is required to convert 110V AC to 12V DC.

Image: A clear diagram illustrating the correct wiring connections for the Herdio speakers and amplifier.
The Herdio speakers feature Bluetooth 5.0 for wireless audio streaming. The Bluetooth coverage can reach up to 65 feet (19.81 meters).
Important Note: If an AUX cable is plugged into the amplifier box, the unit will prioritize the AUX input and will not be available for Bluetooth pairing. Disconnect the AUX cable to enable Bluetooth functionality.

Image: Demonstrates a smartphone connected via Bluetooth to a Herdio speaker.
For wired audio connections, use the 'AUX IN' port on the amplifier box. Connect your audio device (e.g., MP3 player, non-Bluetooth phone) using a standard 3.5mm audio cable. The unit will automatically switch to AUX input when a cable is detected.
The Herdio speakers are designed with a marine-grade rating and IP66 waterproof construction, ensuring durability in harsh outdoor environments. Proper maintenance will extend their lifespan and performance.

Image: The Herdio speaker demonstrating its waterproof capabilities with water splashing on its surface.
| Problem | Possible Cause | Solution |
|---|---|---|
| No sound from speakers | No power to amplifier; incorrect wiring; low volume; device not connected. | Check 12V power connection. Verify speaker wire polarity. Increase volume on both device and amplifier. Ensure device is paired/connected. |
| Bluetooth not connecting/pairing | AUX cable plugged in; device out of range; previously paired device connected; amplifier not in pairing mode. | Unplug any AUX cables. Move device closer to amplifier (within 65 ft). Disconnect from other Bluetooth devices. Power cycle the amplifier. |
| Distorted or poor sound quality | Volume too high; inadequate power supply; damaged speaker/wiring; audio source quality. | Reduce volume. Ensure stable 12V 3A power supply. Inspect wiring for damage. Test with a different audio source. |
| Speakers not turning on | No power connection; faulty power cable/adapter. | Verify 12V power source is active. Check power cable for damage. Ensure proper connection to the amplifier's power jack. |
| Feature | Specification |
|---|---|
| Model Name | HMH-616BT |
| Speaker Type | Outdoor / Marine |
| Mounting Type | Surface Mount |
| Material | Acrylonitrile Butadiene Styrene (ABS) |
| Speaker Size | 4 Inches |
| Impedance | 4 Ohm |
| Maximum Output Power | 100 Watts |
| Frequency Response | 65Hz-20kHz |
| Bluetooth Version | 5.0 |
| Bluetooth Range | Up to 65 Feet (19.81 Meters) |
| Water Resistance Level | IP66 Waterproof |
| Power Source | DC 12V 3A (Corded Electric) |
| Product Dimensions (H x W x D) | 4.3" x 4.3" x 4.3" (11cm x 11cm x 11cm) |
| Item Weight | 5.4 Ounces (per speaker) |
| Included Components | 2 x Speakers, 2 x Mounting Brackets, 1 x Warranty, 1 x Amplifier Box |
Herdio products come with a full warranty. Please refer to the warranty card included in your package for specific terms, conditions, and duration of coverage. Retain your proof of purchase for warranty claims.
For any questions, technical assistance, or warranty inquiries, please contact Herdio customer support. Contact information can typically be found on the warranty card or the official Herdio website. When contacting support, please have your product model number (HMH-616BT) and purchase details ready.
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