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Fosi Audio BT20A PRO Bluetooth Stereo Power Amp

Fosi Audio BT20A PRO Bluetooth Stereo Power Amp

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1. The Evolution of a Legend: BT20A Pro The Fosi Audio BT20A Pro is the high-performance successor to the world-renowned... Read more

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$105.90 Excl. VAT

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    • Shipped today? Order within: Jan 15, 2026 23:59:00 +0800
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    Description

    1. The Evolution of a Legend: BT20A Pro

    The Fosi Audio BT20A Pro is the high-performance successor to the world-renowned BT20A. Re-engineered from the ground up, the Pro version takes everything you loved about the original and pushes it further—more power, cleaner sound, and professional-grade customization. It is the definitive choice for audiophiles who want a compact yet monstrously powerful stereo amplifier.

    2. Key Features & Pro-Grade Upgrades

    Unmatched Power with TPA3255

    • Massive 300W x2 Output: By upgrading to the flagship Texas Instruments TPA3255 chip, the BT20A Pro delivers a staggering 300W x2 (@4Ω). It effortlessly drives large floor-standing speakers with authority and precision.

    • Premium Audio Components: Featuring high-end inductors and capacitors, the Pro version provides a much lower noise floor and higher signal-to-noise ratio than standard mini amps.

    Designed for Audiophile Customization

    • Swappable Op-Amps: The BT20A Pro features internal DIP8 sockets, allowing you to swap the stock NE5532 Op-Amps for high-end alternatives (like Muses02 or OPA2134) to "roll" your own signature sound.

    • Linear Tone Control: The Bass and Treble knobs now feature a center-detent, allowing you to easily reset to a "Flat" response for pure, uncolored sound.

    Refined Connectivity

    • Advanced Bluetooth 5.0: Enjoy stable wireless streaming with a wide range. The BT20A Pro also includes an all-new Bluetooth reset button—simply long-press the volume knob to clear all pairings instantly.


    3. Technical Specifications

    Component Specification
    Amp Chip Texas Instruments TPA3255
    Power Output 300W x2 @4Ω (with 48V Power Supply)
    Input Mode Bluetooth 5.0 + RCA
    Output Mode Passive Speakers + 3.5mm Pre-out
    THD / SNR ≤ 0.005% / ≥ 108dB
    Op-Amps NE5532 (Replaceable)

    4. Why the BT20A Pro is the Best Choice

    The Fosi Audio BT20A Pro is designed for the listener who wants "no compromises." While the original BT20A remains a great entry-level value, the Pro model provides the power headroom needed for high-fidelity transients and the flexibility to upgrade your system over time.

    Specifications

    • Weight: 200gr
    • Usage: Indoor & outdoor

    Pros and cons

    • Sustainably produced
    • Ideal for everyday use
    • May discolor in direct sunlight
    • Texas Instrument TPA3255 Chip

      Texas Instrument TPA3255 Chip

      Has a unique smart algorithm that optimizes the output stage for maxefficiency and min distortion.

      • Distinct and Exceptional Sound Quality

        Distinct and Exceptional Sound Quality

        The two plug-in NE5532 0p-Amps can be replaced by LME49720HA/MUSES02/0PA2134PA 0p-Amps, etc.

        • High Precision and Stability Inductance Values

          High Precision and Stability
          Inductance Values

          Low DC resistance and excellent frequency characteristics which improve
          performance

          Product details

          Description
          • 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 SS3602MUSES02,  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!
          Specifications
          • Output Power: 300Wx2 @4Ω
          • Terminating Impedance: 2-8Ω
          • Input Mode: Bluetooth + RCA
          • Output Mode: Passive Speakers + Pre-out
          • Frequency Range: 20Hz-20kHz(±1.2dB)
          • THD: ≤0.005%
          • SNR: ≥108dB
          • Chip Set: TPA3255
          • Bluetooth Transmission Distance: Up to 50Ft
          • Bluetooth Transmission Format: SBC/AAC
          • Device Dimension: 5x5x1 inches
          • DC Input Range: 24-48V
          • Power Supply: 32V 5A or 48V 5A
          What‘s in the box?
          • BT20A PRO Power Amplifier x 1
          • 32V/5A or48V/5A Power Adapter x 1
          • Bluetooth Antenna x 1
          • User’s Manual x 1

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