Fosi Audio BT20A Pro Bluetooth 5.0 Amplifier 300W x2 TPA3255

Overview

Fosi Audio BT20A Pro — best-selling mini Bluetooth amp with TPA3255, bass/treble control, and replaceable op-amps for passive speakers.

At a Glance

• 300 Watts x2 Power Output
• High Efficiency
• Upgraded Bluetooth 5.0 connectivity
• Sound Control

Key Features

• 300 Watts x2 Power Output: Provided by the TI TPA3255 chip which features an advanced feedback design and proprietary high-speed gate driver error correction. In addition to excellent audio performance, TPA3255 achieves both high power efficiency and very low power stage idle losses below 2.5W.
• High Efficiency: A significant upgrade from the BT20A amplifier. There're two plug-ins NE5532 Op-Amps can be replaced by SS3602 , MUSES02 , OPA2134PA Op-Amps, etc. To create a different sound quality. SNR≥108dB; THD≤0.005%.
• Upgraded Bluetooth 5.0 connectivity: By pressing and holding the volume control for five seconds, the Bluetooth pair can be cleared. In addition, it has a Bluetooth memory function, so it can be easily paired the next time. It also receives an alert tone.
• Sound Control: With its unique design, the BT20A Pro amplifier for home audio has a wide range of bass and treble controls. Alternatively, you can turn the treble and bass effects to a middle point to listen to the original sound without effects.
• What you Get: BT20A Pro Power Amplifier x1(The plug of the power adapter will match the country of your delivery address), Bluetooth Antenna x1, 32V 5A Power Adapter x1, AC Cord x1, User Manual x1, our worry-free 24-month warranty, and friendly customer service.
• Tips: If you don't require a Bluetooth amplifier as much, you can consider the TB10D . It has the same chip and power output, but at a more affordable price!

Who It's For

Wireless streaming to passive speakers, patio/outdoor systems, garage and workshop audio, and simple living-room setups that still want tone control.

Why Choose the BT20A Pro

The BT20A Pro is part of the Fosi Audio lineup of compact HiFi amplifiers, DACs, and desktop audio components. It focuses on practical connectivity, measurable performance, and value — the same product family featured on the official Fosi Audio store and Amazon. Use this page to review specs and photos, then buy through Amazon when you are ready.

Why Fosi Audio

Fosi Audio builds compact HiFi amplifiers, DACs, and desktop audio gear that punch above their price. From TPA3255 power amps to balanced DAC preamps and gaming DAC/AMPs, the lineup focuses on clean sound, useful connectivity, and value — the same products featured on Amazon.

Compare & explore

Browse more bluetooth, compare with Fosi Audio BT30D Pro and Fosi Audio BT20A, or explore DAC & amp models for source components.