S.M.S.L A50Pro 2.1 Channel Bluetooth Amplifier
- Mounting Type: Tabletop Mount
- Warranty Description: 1 year
- Item Weight: 2.45 pounds
- Speaker Maximum Output Power: 100 watts
Last refreshed Aug 4, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A compact 2.0 channel amp from S.M.S.L with HDMI, Bluetooth and optical inputs, built for stereo desktop or bookshelf use rather than surround sound.
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ASIN: B0D1G8TG5BModel: A50ProCategory: Audio Amplifiers
Overview
The S.M.S.L A50Pro is a 2.0 channel amplifier rated at 100 watts, connecting via HDMI, Bluetooth or optical input. It weighs 1.11 lb, making it a compact desktop unit rather than a full-size home theater amp.
With HDMI alongside Bluetooth and optical, the A50Pro covers wired and wireless sources in one small chassis, which suits desktop or bookshelf speaker setups more than a multi-channel home theater rig. Its 2.0 channel layout means stereo output only, not surround sound.
- 100W, 2.0 channel amplifier
- HDMI, Bluetooth and optical connectivity
- 1.11 lb compact build
Who it's for
A fit for desktop or bookshelf speaker setups where stereo sound and multiple input options matter more than surround channels. Not suited to anyone building a multi-speaker home theater system, since it outputs 2.0 channel stereo only.
Pros and cons
- Three input types in one compact unit: HDMI, Bluetooth, optical
- Under 1.2 lb, easy to fit on a desk or shelf
- 2.0 channel stereo only, no surround output
- 100W rating suits near-field speakers, not large rooms
Performance notes
At 100 watts across 2.0 channels, the A50Pro is sized for near-field desktop or bookshelf speakers rather than filling a large room, and the mix of HDMI, Bluetooth and optical inputs lets it pull from a TV, phone or disc player without swapping cables.
Specifications
| Brand | S.M.S.L |
|---|---|
| Model | A50Pro |
| Dimensions & fit | |
| Item Weight | 2.45 poundslower than 59% of 38 audio amplifiers |
| Capacity & performance | |
| Speaker Maximum Output Power | 100 watts |
| Bluetooth Range | 32.8 feet |
| Audio Output Mode | Stereo |
| Age Range Description | Adult |
| Power & efficiency | |
| Power Source | Corded Electric |
| Number Of Power Levels | 10 |
| Construction & materials | |
| Enclosure Material | Metal |
| Compatibility & installation | |
| Mounting Type | Tabletop Mount |
| Compatible Devices | Laptop, Smartphone, Tablet, Television |
| Connectivity Technology | Bluetooth, Optical, HDMI, USB, Line In |
| Connectivity Protocol | Bluetooth, Fiber Optic, HDMI, USB, Line In |
| Subwoofer Connectivity Technology | Wired |
| Included components | |
| Customer Package Type | Standard |
| Unit Count | 1 |
| Warranty & support | |
| Warranty Description | 1 year |
| Warranty Type | Limited |
| Other details | |
| Control Type | Remote, Voice |
| Audio Driver Type | Dynamic Driver |
| Speaker Type | Amplifier |
| Number Of Items | 1 |
| Number Of Audio Channels | 2.1 |
| Number Of Circuits | 3 |
| Total Usb 20 Ports | 1 |
| Is Waterproof | No |
| Mp3 Player | No |
| Builtin Media | Bluetooth Antenna, Remote Controller, USB Cable,HDMI Cable, Power, User Manual |
| Wireless Technology | Bluetooth |
| Additional Features | Bluetooth 5.0, HDMI (ARC), Multi-Device Compatibility, Digital Amplifier Technology |
| Frequency Response | 20 KHz |
| Specific Uses For Product | Home Entertainment Systems |
| Water Resistance Level | Not Water Resistant |
| Antenna Location | For Computers, For Surround Sound Systems, For Televisions |
| Controller Type | Remote Control, Voice Control |
Closest rivals on specs
Pyle PLMRA410BT Bluetooth Marine Amplifier 400W- Item Weight 2.45 vs 2.8 pounds (-12%)
Daakro AK45 Bluetooth Stereo Amplifier 300W- Item Weight 2.45 vs 1.91 pounds (+28%)
Kinter K3118 2.1 Channel Bluetooth Mini Amplifier- Item Weight 2.45 vs 1.8 pounds (+36%)
Frequently asked questions
How many channels does the S.M.S.L A50Pro drive?
It is a 2.0 channel amplifier, stereo output only.
What inputs does the A50Pro support?
HDMI, Bluetooth and optical, according to the listing.
How much does the A50Pro weigh?
1.11 lb, a compact desktop-sized unit.