Fosi Audio BT20A MAX HiFi Stereo Amplifier

Our Take

The Fosi Audio BT20A MAX takes everything we liked about the original BT20A series and pushes it further, offering more power, better connectivity and greater flexibility in a compact amplifier.

What makes the BT20A MAX particularly interesting is its combination of powerful Class D amplification, advanced PFFB technology and Bluetooth 6.0 with support for high-quality audio codecs such as LDAC and aptX Lossless. It's designed to deliver clean, controlled sound while keeping things simple and affordable.

We especially appreciate the addition of a dedicated subwoofer output, adjustable sound controls and remote operation, making it a practical choice for both desktop and living room HiFi systems.

For anyone looking to build a powerful yet affordable stereo setup without the bulk of a traditional amplifier, the BT20A MAX offers impressive value for money.

Product Details

The Fosi Audio BT20A MAX is a compact stereo HiFi amplifier designed to deliver powerful, high-quality sound without taking up much space. Whether you're building your first HiFi system, upgrading an existing setup or simply looking for a convenient way to enjoy music through passive speakers, the BT20A MAX offers an excellent combination of performance and simplicity.

Powered by the Texas Instruments TPA3255 amplifier chip, the BT20A MAX delivers up to 300 watts per channel at 4 ohms (maximum rated output), with a rated RMS output of 180 watts per channel. Its Class D amplification and advanced PFFB technology help reduce unwanted distortion, allowing music to sound cleaner, more detailed and controlled, even when driving demanding speakers.

Wireless listening is equally convenient, thanks to Bluetooth 6.0 with support for high-quality audio formats including LDAC, aptX Lossless, aptX HD and aptX Adaptive. Simply connect your compatible smartphone, tablet or other Bluetooth device and enjoy your favourite music without additional streaming equipment.

For those who prefer wired connections, the BT20A MAX features two RCA inputs, making it easy to connect sources such as a CD player, DAC or dedicated music streamer. A dedicated subwoofer output also allows you to connect an active subwoofer, adding deeper bass to your music and creating a complete 2.1-channel HiFi system.

The amplifier includes adjustable bass and treble controls, giving you the freedom to fine-tune the sound to your liking. Alternatively, its bypass mode lets you enjoy a more direct audio signal without additional tone adjustments. A high-pass filter option also helps manage the frequencies sent to your main speakers when using a subwoofer.

For everyday convenience, the BT20A MAX comes with a remote control, motorised volume adjustment and a 12V trigger input for synchronised power control with compatible equipment. Its improved cooling system features a built-in quiet fan to help maintain stable performance during extended listening sessions.

With its compact construction, modern wireless connectivity and powerful amplification, the Fosi Audio BT20A MAX is a versatile choice for anyone who wants to enjoy proper HiFi sound without a complicated or expensive setup.

Tech Specs