1. Product Overview
The STUDIOFINIX ST-HMS-61BT-EU is a compact and powerful Bluetooth waterproof stereo speaker system designed for various outdoor and marine applications. This system provides high-quality audio with robust construction to withstand challenging environments.

Figure 1: Compact and Powerful Speaker Design. The speakers are compact in size, yet deliver loud sound with a maximum power handling of 120W (A Pair), frequency response of 80-20KHz, and impedance of 4 ohms.
Key Features:
- Waterproof Design: Marine-grade construction with IPX6 rating ensures durability in outdoor and wet conditions.
- Bluetooth Connectivity: Seamless wireless audio streaming from compatible devices.
- Stereo Sound: Two speakers provide a rich stereo audio experience.
- Versatile Application: Suitable for ATVs, UTVs, motorcycles, tractors, boats, and other outdoor vehicles.
- Easy Installation: Designed for straightforward setup with included mounting hardware.

Figure 2: Marine Grade Waterproof Construction. Heavy-duty engineered plastic cabinet ensures the speakers withstand severe outdoor environments, featuring an IPX6 rating and rust-proof speaker grills.
2. Package Contents
Please verify that all items are present in the package before proceeding with installation:
- 1 x Main Speaker Unit
- 1 x Secondary Speaker Unit
- 1 x Bluetooth Amplifier Box (AMP-BTX01)
- 1 x Power Cable for Amplifier
- Mounting Brackets and Screws (4 sets)
- User Manual

Figure 3: Package Contents. This image displays all items included in the STUDIOFINIX ST-HMS-61BT-EU speaker system package.
3. Setup and Installation
Follow these steps for proper installation of your speaker system.
3.1 Power Requirements
The system requires a 12 Volt DC power source with a minimum current of 3 Amperes. Ensure your vehicle or power supply can provide this specification.
3.2 Wiring Connections
- Connect the two speaker units to the 'SPKR' terminals on the Bluetooth amplifier box. Ensure correct polarity (red to positive, black to negative).
- Connect the provided power cable to the 'Power Jack' on the amplifier box.
- Connect the other end of the power cable to your 12V DC power source. The red wire is positive (+), and the black wire is negative (-).
- For auxiliary input, connect your audio device to the 'AUX IN' port on the amplifier box using a 3.5mm audio cable (not included).

Figure 4: Wiring Diagram. This diagram illustrates how to connect the 12V power supply, speakers, and optional auxiliary input to the STUDIOFINIX amplifier box.
3.3 Mounting the Speakers
The speakers come with adjustable mounting brackets for flexible placement. Choose a secure location that allows for optimal sound dispersion and protects the wiring.
- Attach the mounting brackets to the speakers using the provided screws.
- Secure the brackets to your desired surface (e.g., wall, roll bar, dashboard) using the appropriate screws and tools.
- Adjust the angle of the speakers for the best listening experience.

Figure 5: Speaker with Mounting Bracket. The image shows a single speaker unit with its attached mounting bracket, designed for secure installation.
4. Operating Instructions
4.1 Powering On/Off
Once connected to a 12V power source, the amplifier will power on automatically. There is no separate power button on the amplifier box. Disconnect from the power source to turn off.
4.2 Bluetooth Pairing
- Ensure the amplifier is powered on. It will automatically enter pairing mode.
- On your mobile device (smartphone, tablet, laptop), enable Bluetooth.
- Search for available Bluetooth devices. The amplifier will appear as "STUDIOFINIX" or a similar name.
- Select the device to pair. A confirmation tone may sound upon successful connection.
- Once paired, you can stream audio from your device to the speakers.

Figure 6: Bluetooth Pairing. This image demonstrates the successful Bluetooth connection process between a mobile device and the STUDIOFINIX speaker system.
4.3 Using Auxiliary Input (AUX IN)
If you prefer a wired connection or your device does not have Bluetooth, you can use the AUX IN port:
- Connect a 3.5mm audio cable from your audio source to the 'AUX IN' port on the amplifier box.
- The system will automatically switch to auxiliary input when a cable is detected.
5. Maintenance
To ensure the longevity and optimal performance of your STUDIOFINIX speaker system, follow these maintenance guidelines:
- Cleaning: Wipe the speakers and amplifier with a soft, damp cloth. Avoid using harsh chemicals or abrasive cleaners.
- Water Exposure: While waterproof (IPX6), avoid prolonged submersion. Ensure all connections are secure to maintain water resistance.
- Storage: If storing for extended periods, disconnect from power and store in a dry, cool place.
- Inspection: Periodically check all wiring and mounting hardware for signs of wear or looseness. Tighten as necessary.
6. Troubleshooting
If you encounter issues with your speaker system, refer to the following common problems and solutions:
- No Power:
- Check the 12V power connection. Ensure it is securely connected and providing power.
- Verify the power source is active and supplying the correct voltage (12V DC) and sufficient current (at least 3A).
- No Sound:
- Bluetooth: Ensure your device is successfully paired and the volume on both your device and the amplifier is turned up. Try unpairing and re-pairing.
- AUX IN: Ensure the 3.5mm audio cable is fully inserted into both the amplifier and your audio source. Check the volume on your audio source.
- Check speaker wire connections to the amplifier for correct polarity and secure fit.
- Bluetooth Pairing Issues:
- Ensure the amplifier is powered on and within range of your device (up to 65 feet).
- Turn off Bluetooth on other nearby devices to prevent interference.
- Restart your mobile device and try pairing again.
- Distorted Sound:
- Reduce the volume on your audio source or the amplifier.
- Check for loose speaker wire connections.
- Ensure the power supply is stable and not fluctuating.
7. Specifications
Detailed technical specifications for the STUDIOFINIX ST-HMS-61BT-EU speaker system:

Figure 7: Speaker Dimensions. The image provides a visual representation of the speaker's physical measurements.
| Feature | Specification |
|---|---|
| Model Number | ST-HMS-61BT-EU |
| Brand | STUDIOFINIX |
| Speaker Type | Outdoor, Marine |
| Speaker Size | 4 Inches |
| Max Output Power | 120 Watts (per pair) |
| Frequency Response | 20 KHz (up to) |
| Connectivity Technology | Bluetooth |
| Wireless Communication Technology | Bluetooth |
| Bluetooth Range | Up to 65 Feet |
| Audio Output Mode | Stereo |
| Input Voltage | 12 Volts (DC) |
| Power Source | Electric Cable |
| Waterproof Rating | True (IPX6) |
| Product Dimensions | 11.2D x 11W x 10H cm (approx. 4.4D x 4.3W x 4H inches) |
| Control Method | Push Button (on amplifier) |
| Compatible Devices | Smartphone, Laptop, Tablet |
8. Warranty Information
This STUDIOFINIX product is covered by a manufacturer's warranty. Please refer to the following details:
- Manufacturer Warranty: 1 year limited warranty.
- The warranty covers defects in materials and workmanship under normal use.
- Proof of purchase is required for all warranty claims.
For specific terms and conditions, please consult the official STUDIOFINIX website or contact customer support.
9. Support
For further assistance, technical support, or inquiries regarding your STUDIOFINIX ST-HMS-61BT-EU speaker system, please visit the official STUDIOFINIX website or contact their customer service department. Contact information can typically be found on the product packaging or the brand's official online presence.

