Lenrue A39PRO Review: USB-Powered Soundbar with RGB Lights
The Lenrue A39PRO is a simple, plug-and-play soundbar that delivers a solid audio upgrade for desktop and laptop users, featuring colorful ambient lighting and a dedicated volume knob.
By Elvis Dicki
Updated October 20, 2026
The Lenrue A39PRO is a wired, USB-powered soundbar designed to be a straightforward audio upgrade for computers. Aimed at users who want better sound than their built-in laptop or desktop speakers can provide, it offers a no-fuss, driver-free setup. This review analyzes its specifications, design, and user feedback to determine if its 10W stereo sound and feature set make it a worthwhile addition to a home office or gaming desk.
For users seeking an affordable, compact speaker system with a bit of visual flair, the A39PRO presents a compelling case. Its bottom line is clear: it’s a plug-and-play device that prioritizes ease of use and decent audio enhancement for multimedia consumption over high-fidelity sound or wireless convenience.
Prime LENRUE A39PRO 10W Computer Speakers for PC Laptop
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Lenrue A39PRO at a Glance
| Specification | Detail |
|---|---|
| Model | A39PRO |
| Speaker Type | Soundbar |
| Total Output Power | 10W (2x5W) |
| Audio Input | 3.5mm AUX |
| Power Input | USB |
| Key Features | Colorful Breathing Lights, Top-Mounted Volume Knob |
| Compatibility | Devices with 3.5mm jack (Desktop, Laptop, Tablet, Smartphone) |
| Cable Length | Approx. 51 inches (1.3 meters) |
| Dimensions | 12.6″ D x 2.56″ W x 2.17″ H |
| Warranty | Limited 2-Year |
Design and Build
The Lenrue A39PRO adopts a classic soundbar form factor, measuring 12.6 inches in length, making it suitable for placement under most desktop monitors. Its enclosure is constructed from plastic, contributing to a light overall weight. The design is functional, with the primary physical control being a volume knob situated on the top of the unit, a feature highlighted by the manufacturer as more convenient than in-line controls. On the rear, a block switch allows independent control of the speaker’s power and its colorful RGB lighting. The aesthetic is modernized by the integrated breathing light strip, which is designed to enhance the atmosphere of a workspace or gaming setup.
Performance and Features
Audio Performance
According to the specifications, the A39PRO utilizes dual 5W dynamic drivers for a combined 10W of stereo output. The manufacturer states it uses “upgraded 2x5W technology to deliver clear and crystal sound” and is described as “noiseless.” The frequency response is listed as 20 Hz, though a full range is not provided in the data. The impedance is 4 Ohms, and the signal-to-noise ratio is 80 dB. This configuration is intended for general multimedia use—listening to music, watching videos, and casual gaming—providing a noticeable step up from typical built-in laptop speakers without aiming for audiophile-grade performance.
Connectivity and Setup
Connectivity is entirely wired and straightforward. The speaker requires two connections: a USB plug for power (typically to a computer or USB wall adapter) and a 3.5mm AUX cable for audio input. This plug-and-play approach means no drivers are needed, and the manufacturer claims there is no sound delay. A key point of compatibility is the requirement for a standard 3.5mm headphone jack on the source device. The included cables are approximately 51 inches long, offering flexibility in placement relative to the computer. The manufacturer notes it is not suggested for use with most TVs due to plug compatibility issues.
Key Features and Controls
The top-mounted volume knob is a standout feature, allowing for hardware-level volume adjustment independent of the source device’s software controls. On the back, the block switch offers three positions: both lights and speaker on, lights off with speaker on, and both off. This gives users control over the RGB lighting effect, which can be turned off if desired. The speaker is designed for tabletop use and is not listed as having any water resistance.
Setup, Support and Ownership
Setup is minimal: connect the USB for power, plug the 3.5mm jack into the audio source, and flip the switch on the back. The manufacturer provides clear instructions for optimizing volume, advising users to first set their computer’s volume to around 85%, then adjust the media player, and finally use the speaker’s knob for fine-tuning. The product comes with a limited 2-year warranty, the specifics of which are not detailed in the provided data. There is no mention of firmware updates or dedicated software, aligning with its plug-and-play philosophy. For devices lacking a 3.5mm jack, such as newer laptops, an external adapter is required but is not included.
What Owners Say
User reviews for the Lenrue A39PRO are generally positive, with a high percentage of five-star ratings. Owners frequently praise the ease of setup, the convenience of the dedicated volume knob, and the sound quality relative to the price. Many express surprise at the power and clarity of the 10W output, noting it significantly enhances movies, music, and games. The ability to disable the RGB lights is also appreciated by users in office environments. Critical feedback is less common but includes notes that the speaker requires the correct ports to function. The overall sentiment from owners is that it delivers excellent value for casual listening and desktop use.
Pros and Cons
Pros
- Simple, driver-free plug-and-play setup
- Dedicated top-mounted volume knob for easy control
- Colorful RGB lighting with an independent on/off switch
- Solid 10W stereo sound for the size and price
- Long cables provide good placement flexibility
- Wide compatibility with computers and mobile devices
Cons
- Requires both a USB port and a 3.5mm audio jack
- Wired design limits placement vs. wireless speakers
- Not compatible with most TVs
- Audio quality is suited for casual, not critical, listening
- Build materials are primarily plastic
- No Bluetooth or wireless connectivity option
Who Should Buy It (and Who Should Skip It)
The Lenrue A39PRO is an ideal fit for desktop or laptop users who want an immediate, hassle-free audio upgrade for everyday tasks. It’s perfect for students, remote workers, or anyone setting up a home office who enjoys multimedia and wants a splash of ambient lighting. Gamers on a budget looking for better sound than a monitor’s speakers provide will also find it suitable. Its simple operation makes it great for non-technical users.
Conversely, users should skip this speaker if their device lacks a 3.5mm audio jack and they are unwilling to use an adapter. Those seeking a clean, wireless desk setup or high-fidelity audio for music production should look at other tech gear options. It is also not the right choice for primary TV audio, as noted by the manufacturer. For users who need multi-room audio or advanced smart features, exploring dedicated smart speaker systems would be more appropriate.
Final Verdict
The Lenrue A39PRO successfully fulfills its role as an affordable, functional desktop soundbar. It doesn’t pretend to be a high-end audio solution but instead focuses on delivering a reliable plug-and-play experience with noticeably better sound than built-in alternatives. The inclusion of a hardware volume knob and customizable RGB lighting adds practical and aesthetic value that many users appreciate. For its intended use case—enhancing video calls, streaming content, and casual gaming—it represents a sensible value proposition.
While its wired nature and specific port requirements are limitations, they are trade-offs for its simplicity and lack of latency. If your setup can accommodate its connections and you’re looking for an uncomplicated audio boost with a bit of visual personality, the A39PRO is a compelling choice. It stands as a competent entry in the category of basic computer speakers, much like other focused product reviews might highlight for different needs.
FAQs
How do I set up the Lenrue A39PRO speakers?
Setup is plug-and-play. Connect the USB cable to a power source (like your computer) and plug the 3.5mm AUX cable into the headphone jack of your audio source. Then, use the block switch on the back of the speaker to turn it on. No drivers or software installation is required.
Can I turn off the colorful lights on the speaker?
Yes. The block switch on the back has three positions. You can set it to turn both the lights and speaker on, turn the lights off while keeping the speaker on, or turn both completely off. This allows you to use the audio without the RGB lighting if preferred.
What devices are compatible with these speakers?
The speakers are compatible with any device that has a standard 3.5mm headphone jack and a USB port for power. This includes desktop computers, laptops, tablets, and smartphones. The manufacturer does not recommend them for use with most televisions due to potential plug compatibility issues.
What should I do if the sound is not loud enough?
The manufacturer advises a specific sequence for volume adjustment. First, ensure the volume on your computer or monitor is set to around 85%. Next, set the volume in your media player (like a video or music app) to maximum. Finally, use the physical volume knob on top of the speaker to adjust to your desired listening level.
About the author
Elvis Dicki writes reviews and buying guides for CyberSecLabs.