S.M.S.L
S.M.S.L A50Pro
Bottom line: The S.M.S.L A50Pro ($81.59 on Amazon as of 2026-10-06): Ten selectable high/low-pass crossover points for matching most passive subs; main trade-off: subwoofer output is passive only; no line-level RCA sub out for powered subs.
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*Price sourced from Amazon.com. Last updated 2026-10-06. Price and availability subject to change.
Pros & Cons
Pros
- ✓ Ten selectable high/low-pass crossover points for matching most passive subs
- ✓ 100W passive subwoofer output with independent S00-S99 level trim
- ✓ HDMI ARC, optical, AUX, USB and Bluetooth 5.0 inputs on one small box
- ✓ Dual Infineon MA12070P chips hit 92% efficiency, so it runs cool
- ✓ Ships complete: remote, BT antenna, HDMI and USB cables, 12-month warranty
Cons
- ✗ Subwoofer output is passive only; no line-level RCA sub out for powered subs
- ✗ Tone shaping capped at plus/minus 9 steps of treble and bass
- ✗ EQ presets are fixed; no custom parametric or app-based tuning
- ✗ Bluetooth 5.0 rather than 5.3, and codec support is not specified
SpecPicks Verdict
SpecPicks scored S.M.S.L A50Pro using a rating × review-volume × price-fit model applied to published specs and reviews across the displays & upscalers category. S.M.S.L's displays & upscalers lineup sits within the broader category mid-tier; price and specs are the deciding factors over brand loyalty here. Judge it on the specification table and the price rather than on sentiment: check the figures that decide your use case, then put it side-by-side with two or three close alternatives in the Compare tool before clicking through.
Common buyer scenarios for displays & upscalers of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the retailer's listing before purchase. Prices and stock are set by the retailer and may have moved since this page was last updated.
Key Features
- Adjustable Ten Crossover Frequency Points: The A50Pro offers ten adjustable high-pass and low-pass crossover frequency points, allowing flexible pairing with different main speakers and passive subwoofers to help you build your ideal 2.1 sound system.
- Powerful and Adjustable Passive Subwoofer: With passive bass performance of up to 100 watts, you can independently adjust the subwoofer volume from S00 to S99 as needed, accommodating various audio scenarios.
- Multiple EQ Presets and Sound Effect Adjustments: The device is equipped with multiple built-in EQ presets to cater to different musical styles, and supports ±9 levels of treble and bass adjustments, providing a diverse listening experience.
- Strong Compatibility and Multi-Device Support: The USB port supports plug-and-play use, compatible with HDMI (ARC), optical, and AUX inputs, meeting almost all audio connection needs, and allowing connections to passive speakers, subwoofers, TVs, and more.
- Innovative Digital Amplifier Technology: Utilizing German Infineon digital silicon carbide power amplifier chips, achieving an energy efficiency of up to 92%, significantly reducing energy consumption. Additionally, electronic volume control eliminates noise, ensuring pure sound quality.
- You will receive A50Pro amplifier x1, power x1, user manual x1, remote control x1, Bluetooth antenna x1, USB cable x1, HDMI cable x1, as well as a 12 month worry free warranty and friendly customer service.
Full Specifications
| Brand | S.M.S.L |
|---|---|
| Model Name | A50Pro |
| Unit Count | 1 Count |
| Connectivity | Bluetooth, USB |
| Model Number | A50PRO |
| Power Source | Electrical Wire |
| Speaker Type | Amplifier |
| Is Waterproof | False |
| Mounting Type | Tabletop Mount |
| Warranty Type | Limited |
| Built-In Media | Bluetooth antenna, Remote Controller, USB cable,HDMI cable, power, user manual |
| Control Method | Remote |
| Bluetooth Range | 10 meters |
| Controller Type | Remote Control, Voice Control |
| Number of Items | 1 |
| Antenna Location | For Computers, For Surround Sound Systems, For Televisions |
| Audio Driver Type | Dynamic Driver |
| Audio Output Mode | Stereo |
| Compatible Devices | Laptop, Smartphone, Tablet, Television |
| Enclosure Material | Metal |
| Full listing title | S.M.S.L A50Pro,LPF&HPF,2.1 Channel Audio Amplifier,100W Bass Output Power, HiFi Bluetooth 5.0 Stereo Audio Amplifier,Supports HDMI (ARC),Passive Subwoofer,MA12070P*2 Chip |
Ready to buy?
S.M.S.L A50Pro,LPF&HPF,2.1 Channel Audio Amplifier,100W Bass Output Power, HiFi Bluetooth 5.0 Stereo Audio Amplifier,Supports HDMI (ARC),Passive Subwoofer,MA12070P*2 Chip is listed on Amazon. Price, availability, shipping and returns are set by Amazon and its sellers — check the listing for current terms. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.
*Price sourced from Amazon.com. Last updated 2026-10-06. Price and availability subject to change.
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