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Compact black metal stereo amplifier with volume, bass and treble knobs

Fosi Audio BT20A 200W Stereo Amplifier Receiver

SKU CH-FRQG-K4Q4M

Compact two-channel Class D amplifier delivering 200 watts with Bluetooth and RCA inputs for passive speakers

  • Channels2
  • Power Output200 watts
  • Output200 watts
  • Power Supply230 volts
  • Dimensions5.2 in x 3.54 in x 1.42 in
  • Weight1.5 lb
  • 100W per channel drives passive speakers with authority
  • Bluetooth and RCA inputs connect phones, turntables or TVs directly
  • Bass and treble knobs tailor sound to any room
  • Compact 5.2 × 3.54 × 1.42 in metal chassis fits tight shelves
  • CE, FCC, RoHS and WEEE certified for safe operation

Entry-level stereo amplifier for passive speakers

The BT20A is a two-channel Class D amplifier rated at 200 W total output, designed to drive passive bookshelf, ceiling or outdoor speakers from a compact metal chassis. It accepts Bluetooth streaming and RCA line-level sources, with front-panel bass and treble controls for basic tone shaping. A 24 V 4.5 A supply is included, operating from 230 V mains. The unit measures 5.2 x 3.54 x 1.42 in and weighs 1.5 lb.

Sustained output within a small enclosure

Class D topology keeps heat low enough that the all-black case acts as its own heatsink without external fins or fans. The 100 W per channel maximum is available for peaks, while continuous power stays within the thermal limits of the sealed metal body. Volume and tone controls are analog, so adjustments are immediate and do not introduce digital processing latency during extended listening sessions.

Replaces a bulky legacy receiver

Owners of older separate-component systems can swap a full-size integrated amp for this 1.5 lb unit and reclaim shelf space. It also upgrades powered-speaker setups that lack a dedicated amplifier stage, letting passive cabinets play louder and cleaner. The jump is worthwhile when the existing gear is larger than 5.2 in deep or when Bluetooth convenience is missing entirely.

Highlights

  • 100W per channel drives passive speakers with authority
  • Bluetooth and RCA inputs connect phones, turntables or TVs directly
  • Bass and treble knobs tailor sound to any room
  • Compact 5.2 × 3.54 × 1.42 in metal chassis fits tight shelves
  • CE, FCC, RoHS and WEEE certified for safe operation

Specifications

BrandFosi Audio
ModelFosi Audio BT20A
Part NumberBT20A
Channels2
Power Output200 watts
Output200 watts
Power Supply230 volts
Dimensions5.2 in x 3.54 in x 1.42 in
Weight1.5 lb
Package ContentsFosi Audio BT20A Amplifier x1, 24V 4.5A Power Supply x1, User Manual x1

Questions about this item

How hot or noisy does the BT20A run after hours of continuous use?

The Class D design with an all-metal chassis stays cool and silent during long sessions; no fan is fitted so there is no audible noise.

What speakers and source gear must I already own to use this amplifier?

You need a pair of passive speakers rated for up to 100 W per channel and either a Bluetooth device or a source with RCA outputs; the box includes the 24 V 4.5 A power supply.

Will the BT20A work alongside my vintage receiver that only has speaker-level outputs?

No — this unit accepts only Bluetooth and line-level RCA inputs, so it cannot connect directly to speaker-level outputs from older gear.

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