1. Introduction
This manual provides detailed instructions for the installation, operation, and maintenance of your Herdio MXR-006-61B Marine Stereo Receiver and 4-inch Marine Speakers. This system is designed for use in marine environments and various powersports vehicles, offering robust performance and weather resistance.

Figure 1: Herdio MXR-006-61B Marine Stereo Receiver and 4-inch Speakers.
2. Product Features
- IP66 Waterproof Rating: The stereo receiver features an IP66 waterproof screen, protecting it from harsh marine conditions and UV exposure.
- Bluetooth Connectivity: Advanced 5.0 Bluetooth technology allows for wireless music streaming from compatible devices such as smartphones, tablets, and MP3 players.
- Multi-Source Playback: Supports AM/FM radio, USB input for flash drives, and RCA Aux-in for connecting external audio sources.
- High-Quality Speakers: Two 4-inch marine-grade HIFI full-range stereo pod speakers with 1-inch PEI dome tweeters, offering a maximum handling of 100 watts per pair.
- Durable Construction: Solid aluminum chassis and state-of-the-art weatherproofing materials ensure longevity in challenging environments.
- Versatile Application: Ideal for boats, marine watercraft, automobiles, off-road vehicles, ATVs, UTVs, RVs, golf carts, ski boats, yachts, outdoor spas, and industrial applications.

Figure 2: Key features of the Herdio Marine Stereo Receiver.

Figure 3: Key features of the Herdio Marine Speakers.
3. Package Contents
Verify that all items are present in the package before beginning installation.
- 1 x Herdio Marine Stereo Receiver (Model: MXR-006-61B)
- 2 x Herdio 4-inch 2-Way Mount Marine Speakers (Model: HMS-61)
- Mounting Hardware (screws, nuts, brackets)
- Wiring Harnesses
- User Manual (this document)

Figure 4: Included components in the Herdio MXR-006-61B package.
4. Setup and Installation
4.1 Safety Precautions
- Always disconnect the vehicle's battery before starting any electrical installation.
- Ensure proper wiring connections to prevent short circuits or damage to the unit.
- Consult a professional if you are unsure about any installation steps.
4.2 Mounting the Stereo Receiver
The stereo receiver is designed for flush mounting. Ensure the mounting surface is flat and stable.
- Measure the cutout dimensions: 5.39 inches (W) x 3.43 inches (D). The total mounting depth required is 2.91 inches.
- Carefully cut the opening in the desired mounting location.
- Insert the receiver into the opening and secure it using the provided mounting hardware.

Figure 5: Stereo receiver and speaker dimensions for installation planning.
4.3 Mounting the Speakers
The 4-inch speakers can be mounted on a deck or overhead using the mini-shaped mounting brackets.
- Choose a suitable location for the speakers, ensuring they are securely fastened.
- Use the provided brackets and screws to attach the speakers.
- Ensure the speakers are positioned to direct sound effectively.
4.4 Wiring Connections
Refer to the wiring diagram included with your product for specific connections. General connections include:
- Power (Yellow): Connect to a constant 12V power source.
- Accessory (Red): Connect to a switched 12V power source (e.g., ignition).
- Ground (Black): Connect to a solid chassis ground.
- Speaker Wires: Connect the speaker wires from the receiver to the corresponding speakers, ensuring correct polarity (+/-).
- Antenna: Connect an AM/FM antenna (not included) for radio reception.
- RCA Aux-in: For connecting external audio devices.
5. Operating Instructions
Familiarize yourself with the control panel of the stereo receiver.

Figure 6: Control panel layout and button functions.
- Power On/Off (1): Press the SRC button to turn the unit on or off.
- Source Selection (1): Press the SRC button repeatedly to cycle through available sources: FM, AM, Bluetooth, USB, AUX.
- Volume Control (4, 5): Use the VOL+ (4) and VOL- (5) buttons to adjust the volume level.
- Tuning/Track Control (2, 3):
- In Radio mode: Use the Tune Down/Previous Track (2) and Tune Up/Next Track (3) buttons to change radio stations.
- In Bluetooth/USB mode: Use these buttons to skip to the previous or next track.
- Band/Scan (6): In Radio mode, press BAND/SCAN to switch between FM1, FM2, FM3, AM1, AM2 bands. Hold to auto-scan and store stations.
- Setting/Clock (7): Press SEL/CLK to access settings or adjust the clock.
- Mute/Dim (8): Press MUTE/DIM to mute audio or adjust display brightness.
- Preset Buttons (9, 10, 11, 12): Use buttons 1-4 for radio station presets or specific playback functions (Play/Pause, Intro Scan, Repeat, Random) in media modes.
5.1 Bluetooth Pairing
- Turn on the stereo receiver and select the Bluetooth source.
- On your mobile device, enable Bluetooth and search for available devices.
- Select "Herdio" or a similar name from the list to pair.
- Once paired, you can stream audio from your device to the stereo system.
5.2 USB Playback
Insert a USB flash drive containing audio files into the USB port. The unit will automatically switch to USB mode and begin playback.
5.3 AUX Input
Connect an external audio device (e.g., MP3 player) to the RCA Aux-in ports using an appropriate cable. Select AUX as the source on the receiver.
6. Maintenance
- Cleaning: Use a soft, damp cloth to clean the unit's exterior. Avoid harsh chemicals or abrasive cleaners.
- Connections: Periodically check all wiring connections to ensure they are secure and free from corrosion, especially in marine environments.
- Storage: If storing the vehicle or boat for an extended period, ensure the unit is powered off and consider disconnecting the battery.
7. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No power | Incorrect wiring; Blown fuse; Disconnected battery. | Check power and ground connections. Inspect fuses. Ensure battery is connected. |
| No sound from speakers | Incorrect speaker wiring; Volume too low; Mute activated. | Verify speaker connections and polarity. Increase volume. Deactivate mute function. |
| Bluetooth not pairing | Bluetooth not enabled on device; Unit not in pairing mode; Device too far. | Ensure Bluetooth is active on your device. Select Bluetooth source on receiver. Move device closer. |
| Poor radio reception | Antenna not connected; Poor antenna placement; Weak signal area. | Check antenna connection. Adjust antenna position. Try a different location. |
| USB not playing | Incompatible file format; USB drive corrupted; Unit not in USB mode. | Ensure audio files are compatible. Try a different USB drive. Select USB source. |
8. Specifications
| Feature | Detail |
|---|---|
| Model Name | Marine Radio And Speakers |
| Item Model Number | MXR-006-61B |
| Brand | Herdio |
| Input Voltage | 12 Volts |
| Stereo Max Power Output | 50 Watts x 2 (Rated Power: 20 Watts x 2) |
| Speaker Type | Coaxial, 2-Way 4-inch Marine Grade HIFI Full Range Stereo Pod Speakers with 1-inch PEI Dome Tweeter |
| Speaker Max Power Handling | 100 Watts (A Pair) |
| Speaker Impedance | 4 Ohms |
| Frequency Response | 80 - 20,000 Hz |
| Waterproof Rating | IP66 (for receiver screen) |
| Connectivity Technology | Bluetooth 5.0 |
| Supported Media | AM/FM Radio, USB, AUX, RCA MP3 |
| Stereo Cutout Dimensions (W x D) | 5.39 inches x 3.43 inches |
| Stereo Mounting Depth | 2.91 inches |
| Speaker Dimensions (W x H x D) | 4.4 inches x 4.4 inches x 4 inches |
| Item Weight | 2.42 pounds (total package) |
| UPC | 707870372656 |
9. Warranty and Support
9.1 Warranty Information
This product comes with a Limited Warranty. For specific terms and conditions, please refer to the warranty documentation included with your purchase or contact Herdio customer support.
The standard return policy allows for returns within 30 days of purchase for refund or replacement.
9.2 Customer Support
For technical assistance, troubleshooting, or warranty claims, please visit the official Herdio store or contact their customer service department.
Official Herdio Store: Herdio Store on Amazon





