US
Facmogu

Facmogu ST-838 2.1 Channel Subwoofer Amplifier

  • Output Power: 80 watts
  • Number Of Channels: 2
  • Mounting Type: Freestanding
  • Maximum Supply Voltage: 12 volts

Last refreshed Aug 4, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.

Our verdict

A compact 80-watt Facmogu amplifier sized for a desktop or shelf setup, though connector details are not listed so confirm compatibility first.

As an Amazon Associate I earn from qualifying purchases. ProductDome earns a commission when you buy through links on this page.

ASIN: B0B6B6MJP2Model: A18226-MG-USCategory: Audio Amplifiers

Overview

The Facmogu A18226-MG-US is a compact amplifier rated at 80 watts, measuring 5.9 by 3.6 by 1.4 inches. Its small footprint places it with desktop or shelf audio setups rather than full-size AV receivers.

At under 6 inches in its longest dimension, this amplifier is built to tuck behind a speaker or onto a shelf rather than occupy rack space. The 80-watt rating gives it enough power for a modest pair of bookshelf or desktop speakers. Beyond size and power, no connector types are listed, so confirm input and speaker terminal compatibility before pairing it with existing gear.

  • 80 W power rating
  • 5.9 x 3.6 x 1.4 in footprint
  • Facmogu brand

Who it's for

Someone building a compact desktop or shelf audio setup who needs a small 80-watt amplifier rather than a full-size receiver. Not the right fit for anyone needing a documented set of inputs, since connector types are not listed here.

Pros and cons

Pros
  • Compact footprint under 6 inches
  • 80 W rating suits small speaker pairs
Cons
  • Connector types not specified
  • Small size limits power for larger rooms

Performance notes

The 80-watt rating gives this amplifier enough output for a small pair of speakers in a desktop or shelf setup, and its compact 5.9 by 3.6 by 1.4 inch footprint means it can sit close to the speakers themselves rather than needing rack space. Because input and output connector types are not specified, real-world performance depends on matching it correctly to your existing speaker wiring.

Specifications

BrandFacmogu
ModelA18226-MG-US
Capacity & performance
Output Power80 watts
Power & efficiency
Maximum Supply Voltage12 volts
Voltage12 volts
Minimum Supply Voltage11 volts
Construction & materials
Material TypeAluminum Alloy
Compatibility & installation
Mounting TypeFreestanding
Included components
Unit Count1
Package Type NameBox
Other details
Number Of Channels2
Part NumberA18226-MG-US
Specification MetFCC

Closest rivals on specs

HiLetgo TDA2050 Mono Amplifier Board 2 Pack
  • Voltage 12 vs 24 volts (-50%)
  • Maximum Supply Voltage 12 vs 24 volts (-50%)
  • Output Power 80 vs 120 watts (-33%)
FiiO Warmer R2R Tube Buffer and DAC Amp
  • Maximum Supply Voltage 12 vs 28 volts (-57%)
  • Output Power 80 vs 46 watts (+74%)
Compare all side by side

Frequently asked questions

How much power does the Facmogu A18226-MG-US put out?

It is rated at 80 watts.

How big is the Facmogu A18226-MG-US?

It measures 5.9 by 3.6 by 1.4 inches.