Audiophoria
Fosi Audio BT20A Pro 48V Amplifier

48V Class D amplifier with TPA3255, Bluetooth 5.0, tone controls, pre-out and 225W × 2 at 4Ω with the included 48V/5A PSU.

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€115.00

Includes 20% VAT

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System Matching Guide

Optimal For:

Budget desktop and compact passive-speaker stereo systems

Not Ideal For:

Balanced systems or multiple wired analogue sources

Power Consumption: medium

Build an Affordable Stereo System

The 6Ω DK560-N bookshelf speakers make a naturally priced passive speaker partner for the BT20A Pro 48V.

In StockFosi
Fosi Audio DK560-N passive bookshelf speakers front view

Fosi Audio DK560-N Bookshelf Speakers

Bookshelf Speakers | Loudspeakers

€180.00

Highlights

Power Supply
48V/5A included
Amplifier Platform
TI TPA3255 Class D
48V Output Power
225W × 2 at 4Ω, 1% THD
Wireless Input
Bluetooth 5.0 with SBC / AAC
Tone Control
Independent bass and treble adjustment
System Expansion
3.5mm pre-out for active subwoofer or amplifier

FOSI AUDIO BT20A PRO 48V AMPLIFIER

The Fosi Audio BT20A Pro 48V is a compact Class D integrated amplifier supplied with a 48V/5A power supply for its higher-output configuration. It combines stereo RCA and Bluetooth 5.0 inputs with volume, bass and treble controls, a 3.5mm pre-out and speaker outputs, making it an accessible solution for desktop, bookshelf and compact stereo systems.

TPA3255 CLASS D AMPLIFICATION

The amplification stage is built around the Texas Instruments TPA3255 Class D platform. With the included 48V/5A power supply, this version is specified at 225W × 2 into 4Ω at 1% THD, providing significantly greater available output than the lower-voltage configuration of the BT20A Pro.

RCA & BLUETOOTH 5.0

The BT20A Pro accepts a conventional stereo RCA source or wireless playback over Bluetooth 5.0. Bluetooth supports SBC and AAC codecs and has a specified transmission range of up to 50ft. Bluetooth takes priority when an active wireless connection is present.

BASS, TREBLE & PRE-OUT

Independent bass and treble controls allow simple adjustment to suit the loudspeakers, room or personal preference, with centre positions for neutral response. The rear 3.5mm pre-out can feed an active subwoofer, powered speakers or another amplifier, adding useful flexibility to compact 2.1 and multi-amplifier systems.

SWAPPABLE OP-AMPS

Two socketed NE5532 operational amplifiers can be replaced with compatible alternatives including LME49720HA, MUSES02, OPA2134PA and LM4562. This gives experienced users an optional route for experimenting with the analogue stage while retaining the core TPA3255 amplifier architecture.

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Covered by a 2-Year EU Warranty, with Free EU Shipping on orders over €150 and our Best Price Promise.

Professional reviews

HiFiReport
"The BT20A Pro is one of the most straightforward recommendations in consumer audio today."

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