Introduction
The Lenovo BMS09 Wired Speakers are designed to deliver a high-fidelity stereo audio experience for your computer, TV, or mobile devices. Featuring 52mm full-range dual speakers and a bass-heavy diaphragm, these speakers provide powerful treble and rich bass, creating an immersive 3D surround sound. With a minimalist aesthetic and durable construction, the BMS09 is a versatile audio solution for various environments.

Lenovo BMS09 Wired Speakers, designed for clear audio output.
Features
- HiFi Stereo Sound: Equipped with 52mm full-range dual speakers and a bass-heavy diaphragm for rich, powerful audio and 3D surround sound.
- Two-Way Crossover Four-Speaker Unit: Utilizes a full-range driver and an accentuated woofer, forming a true stereo 2.0 HiFi system with four independent units.
- Dual Bass Diaphragm: Features 50x90mm double bass large diaphragms for deep, stable low frequencies.
- Minimalist Design: Fashionable aesthetic with a titanium silver metal texture box and a delicate sandblasting process.
- Durable Construction: Titanium silver metal 3D three-dimensional steel mesh, crafted through dozens of high-temperature polishing processes.
- USB Powered: Convenient USB 2.0 interface for plug-and-play power supply, offering high-efficiency digital amplification.
- DC3.5mm Audio Input: Ensures audio and video synchronization with zero delay when connected to computers, notebooks, TVs, and mobile phones.
- Wheel-Style Volume Control: Easy and precise adjustment of audio levels.
- Ergonomic Design: Small elevation angle (15 degrees) specifically designed for near-sound field desktop listening, reducing reflection interference.

Internal structure illustrating the two-way crossover and four-speaker unit design.
Specifications
| Attribute | Value |
|---|---|
| Item Condition | New |
| Brand Name | Lenovo |
| Model | BMS09 |
| Speaker Type | Portable |
| Use | Home |
| Channels | 2 (2.0) |
| Sound Mode | Stereo Sound Mode |
| Audio Crossover | Two-Way |
| Number of Loudspeaker Enclosure | 1 |
| Input/Output | USB |
| Power Source | AC (via USB adapter or port) |
| Input Power(W) | <25 W |
| Frequency Range | 75Hz-20KHz |
| Sensitivity | 58 |
| Material | Metal, Steel (grille), Plastic (cabinet) |
| Cabinet Material | Plastic |
| Product Size | 383mm (Depth) x 58mm (Width) x 65mm (Height) |
| Weight | 535 g |
| Wire Length | 90cm |
| Applicable Models | Computer/TV/Mobile Phone |
| Voice Control | No |
| Waterproof | No |
| Support APP | Yes |
| Battery | No |
| Intelligent Personal Assistant | None |

Product dimensions: 383mm length, 58mm width, 65mm height.
Setup Instructions
- Power Connection: Connect the USB cable from the speakers to a USB port on your computer, a USB wall adapter, or a charging head for power supply. The speakers require less than 25W of input power.
- Audio Input Connection: Connect the 3.5mm audio jack from the speakers to the audio output port of your device (computer, laptop, TV, or mobile phone). This ensures direct audio input and zero delay between audio and video.
- Placement: Position the speakers on a flat surface. The small 15-degree elevation angle is designed to optimize sound for desktop listening, reducing interference from surface reflections.

Diagram illustrating USB power connection, 3.5mm audio input, and volume control.
Operating Instructions
- Power On/Off: The speakers are powered on when connected to a live USB port. There is no separate power button.
- Volume Control: Use the wheel-style volume control located on the speaker cable to adjust the audio output level. Turn the wheel clockwise to increase volume and counter-clockwise to decrease it.
- Audio Playback: Once connected, play audio from your source device (computer, TV, mobile phone). The speakers will automatically output the sound.
Maintenance
- Cleaning: Use a soft, dry cloth to wipe the speaker surfaces. Do not use liquid cleaners or abrasive materials, as they may damage the finish or internal components.
- Storage: When not in use for extended periods, disconnect the speakers from power and audio sources. Store them in a cool, dry place away from direct sunlight and extreme temperatures.
- Handling: Avoid dropping the speakers or subjecting them to strong impacts, which can damage the internal components and affect sound quality.
Troubleshooting
- No Sound:
- Ensure the USB power cable is securely connected to a working USB port or power adapter.
- Verify the 3.5mm audio jack is fully inserted into the audio output port of your device.
- Check the volume control wheel on the speaker cable and ensure it is turned up.
- Confirm that the volume on your source device (computer, TV, phone) is not muted or set too low.
- Test with a different audio source or USB port if possible.
- Distorted Audio:
- Lower the volume on both the speakers and your source device. High volume levels can cause distortion.
- Ensure all cables are securely connected and not damaged.
- Try playing audio from a different source to rule out issues with the original audio file or device.
- Speakers Not Recognized by Device:
- Since these are wired speakers using a standard 3.5mm audio jack, they typically do not require driver installation. Ensure your device's audio output is correctly configured to use the external speakers.
- Restart your source device.
User Tips
- Optimal Placement: For the best sound experience, place the speakers on a stable surface, ideally at ear level when seated, to take advantage of their 15-degree elevation design.
- Cable Management: Keep the USB and audio cables tidy to prevent tangles and accidental disconnections.
- Versatile Use: These speakers are suitable for various settings including office desks, home entertainment setups, and even portable outdoor use (with a compatible power bank).
Warranty and Support
For warranty information and customer support, please refer to the documentation provided at the time of purchase or contact your retailer. Keep your proof of purchase for any warranty claims.