1. Introduction
This manual provides detailed instructions for the installation, operation, maintenance, and troubleshooting of your GUZARE Marine Bluetooth Audio System Package. This system is designed for marine and outdoor environments, offering robust performance and versatile connectivity. Please read this manual thoroughly before installation and use to ensure proper function and longevity of your product.

Image 1.1: The GUZARE Marine Bluetooth Audio System Package, highlighting its 100 Watts peak power and IPX6 water splashing protection, designed to fit standard gauge openings.
2. What's in the Box
Your GUZARE Marine Bluetooth Audio System Package includes the following components:
- 1 x Marine Stereo Receiver
- 1 pair (2 units) of 4" Marine Speakers (black)
- 1 x FM AM Antenna (black)
- 1 x Wiring Harness
- 2 x Installation Nuts
- 1 x Instruction Manual
- 1 x U Bracket

Image 2.1: Visual representation of all components included in the package: radio, wiring harness, installation nuts, instruction manual, and U bracket.
3. Product Features
The GUZARE Marine Bluetooth Audio System is engineered for durability and high-quality audio in challenging environments.
3.1. Key Features
- Complete Marine Audio Solution: Includes a waterproof gauge-style marine radio, a pair of 4" marine speakers, and a marine FM/AM antenna.
- Versatile Media Inputs: Supports Bluetooth music streaming, USB/MP3 playback, AUX input, and RCA input for flexible connectivity with various audio sources and mobile devices.
- Marine-Grade Durability: Features an IP66 waterproof rating, solid aluminum chassis, rubber tactile buttons, and corrosion-resistant design, making it suitable for harsh marine and outdoor conditions.
- Clear Sound Speakers: The 4" marine speakers are equipped with polypropylene cones and rubber surrounds, handling up to 120W power per pair, ideal for boats, yachts, ATVs, UTVs, and golf carts.
3.2. Technical Specifications
| Specification | Detail |
|---|---|
| Brand | GUZARE |
| Model Number | GR-304-4001B-056B |
| Connectivity Technology | Auxiliary, Bluetooth, USB |
| Controller Type | Push Button |
| Special Feature | Waterproof (IP66) |
| Compatible Devices | Smartphone, Tablet, USB Device, Speaker, Boat Stereo |
| Connector Type | 3.5mm Jack, RCA, USB |
| Audio Output Mode | Stereo |
| Surround Sound Channel Configuration | 4.0 |
| Output Power | 40 Watts (RMS) |
| Output Wattage | 160 Watts (Peak) |
| Number of Channels | 2 |
| Wireless Technology | Bluetooth |
| Audio Format Support | WAV (via USB) |
| Power Requirement | 12V DC |
4. Setup and Installation
Proper installation is crucial for the performance and durability of your audio system. This system is designed for 12V DC power systems.
4.1. Planning the Installation
- Location: Select a mounting location for the marine stereo receiver that is easily accessible and protected from direct impact. The receiver is designed to fit into a standard gauge (tachometer) opening.
- Clearance: Ensure sufficient space behind the mounting surface for the receiver's body, wiring, and the U-bracket.
- Wiring: Plan the routing of all cables (power, ground, speaker, antenna, auxiliary, USB) to avoid interference and ensure they are adequately protected from environmental elements. The wiring harness is color-coded for easier identification.
4.2. Receiver Installation
- Cutout: Create a circular cutout in your mounting panel. Refer to the dimensions provided in Image 4.1 for precise measurements.
- Insert Receiver: Carefully insert the marine stereo receiver into the cutout from the front.
- Secure with U-Bracket: From behind the panel, slide the U-bracket over the threaded studs on the back of the receiver. Secure it with the provided installation nuts, tightening them evenly until the receiver is firmly in place.

Image 4.1: Detailed dimensions of the marine stereo receiver for accurate installation. The front face measures 89mm (3.5in) in diameter, and the body depth is 78.5mm (3.1in).
4.3. Speaker Installation
- Cutout: Create circular cutouts for the 4" marine speakers. Refer to the dimensions in Image 4.2.
- Mount Speakers: Insert the speakers into the cutouts and secure them using appropriate screws (not included) through the mounting holes.
- Connect Wiring: Connect the speaker wires from the wiring harness to the speaker terminals, observing correct polarity (+ to + and - to -).

Image 4.2: Dimensions of the 4-inch marine speakers. The overall diameter is 124mm (4.88in), and the mounting depth is 35mm (1.38in).
4.4. Antenna Installation
- Mounting: Choose a location for the FM/AM antenna that provides good reception and is clear of obstructions. The antenna features a flexible mast and an adjustable base for various mounting angles.
- Secure Antenna: Mount the antenna securely using its base.
- Connect Cable: Route the antenna cable to the receiver and connect it to the designated antenna input.

Image 4.3: Dimensions of the marine FM/AM antenna. The mast size is 450mm (16.7in), and the cable length is 1385mm (54.5in).
4.5. Wiring Connections
Connect the wiring harness to your vehicle's 12V power system. Ensure all connections are secure and insulated to prevent short circuits.
- Power (Red/Yellow): Connect the red (accessory) and yellow (constant 12V) wires to appropriate 12V power sources.
- Ground (Black): Connect the black wire to a solid chassis ground point.
- Speaker Wires: Connect the speaker wires (e.g., white/white-black, gray/gray-black) to your speakers. The system supports 4 channels, allowing for additional speakers if desired (not included in this package).
- Auxiliary/RCA: Connect external audio devices via the AUX input or RCA input/output cables as needed.
- USB: The USB port allows for MP3 file playback and device charging.

Image 4.4: Rear connections of the marine stereo receiver, including USB, RCA output, and AUX input ports.
5. Operating Instructions
The GUZARE Marine Bluetooth Audio System features intuitive push-button controls for easy operation.
5.1. Basic Controls
- Power Button: Press to turn the unit ON/OFF.
- VOL+/VOL-: Adjust volume up or down.
- MODE Button: Press to cycle through available audio sources (FM/AM Radio, Bluetooth, USB, AUX). A long press may access additional menu options.
- BAND/Play/Pause Button: In radio mode, press to change radio bands (FM1, FM2, FM3, AM1, AM2). In Bluetooth/USB mode, press to play or pause audio.
- Forward/Backward Arrows: In radio mode, short press to seek next/previous station. Long press to manually tune. In Bluetooth/USB mode, short press to skip tracks.
5.2. Bluetooth Pairing
- Turn on the marine stereo receiver.
- Press the MODE button until "Bluetooth" or "BT" is displayed on the screen. The unit will enter pairing mode, indicated by a flashing Bluetooth icon or message.
- On your mobile device, enable Bluetooth and search for available devices.
- Select "GUZARE" (or similar name) from the list of devices.
- Once paired, the unit will confirm the connection, and you can stream audio from your device.
5.3. USB Playback
- Insert a USB drive containing WAV audio files into the USB port.
- Press the MODE button until "USB" is displayed. The unit will automatically begin playing audio files from the USB drive.
- Use the forward/backward arrows to navigate tracks and the BAND/Play/Pause button to control playback.
5.4. FM/AM Radio
- Press the MODE button until "FM" or "AM" is displayed.
- Press the BAND button to switch between FM1, FM2, FM3, AM1, and AM2 bands.
- Short press the forward/backward arrows to automatically seek the next/previous strong station.
- Long press the forward/backward arrows for manual tuning.
Video 5.1: An official product video demonstrating the GUZARE Boat Marine Stereo Receiver's features, including MP3 file playback via USB and general operation.
6. Maintenance
Regular maintenance ensures the longevity and optimal performance of your marine audio system.
- Cleaning: Wipe the receiver and speakers with a soft, damp cloth. Avoid using harsh chemicals or abrasive cleaners, which can damage the waterproof seals or finish.
- Connections: Periodically check all wiring connections for corrosion or looseness. Ensure all waterproof caps (if applicable) are securely in place.
- Environmental Protection: While the system is IP66 waterproof, prolonged exposure to extreme conditions (e.g., direct saltwater spray, intense UV without cover) should be minimized when possible to extend product life.

Image 6.1: The marine stereo receiver shown with water splashing, illustrating its IP66 marine-grade waterproof construction.
7. Troubleshooting
If you encounter issues with your audio system, refer to the following common troubleshooting steps:
| Problem | Possible Cause | Solution |
|---|---|---|
| No power | Loose power connection, blown fuse, incorrect wiring. | Check power and ground connections. Verify fuse integrity. Ensure correct 12V wiring. |
| No sound from speakers | Speaker wires disconnected, incorrect polarity, volume too low, incorrect source selected. | Check all speaker wire connections and polarity. Increase volume. Select the correct audio source. |
| Poor radio reception | Antenna not connected, damaged antenna, poor antenna placement, weak signal area. | Ensure antenna is securely connected. Check antenna for damage. Relocate antenna if possible. |
| Bluetooth not connecting | Unit not in pairing mode, device Bluetooth off, previously paired to another device. | Ensure unit is in Bluetooth pairing mode. Turn Bluetooth on/off on your device. Forget previous connections on your device and re-pair. |
| USB playback issues | Unsupported file format, corrupted USB drive, loose USB connection. | Ensure files are in WAV format. Try a different USB drive or reformat the current one. Check USB connection. |
8. Warranty and Support
This GUZARE Marine Bluetooth Audio System Package comes with a 1-Year Manufacturer Warranty.
For warranty claims, technical support, or further assistance, please contact GUZARE customer service through the retailer where the product was purchased or refer to the contact information provided on the official GUZARE website.