Fosi Audio BT20A Pro

$99.99 Price Tier: Budget

5.0 (1)

3 Critic Reviews

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Page last updated Apr 16, 2026

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We compare 600+ stores and found this item at 2 stores. Prices updated February 5, 2026.

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Fosi Audio

$99.99

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Walmart

$99.99

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Average Price: $100

Budget/Beginner

$299

$1500+

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In the Power Amplifiers category, Fosi Audio BT20A Pro is priced in the Budget/Beginner range. This is great gear to get started with or for creators on a budget.

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Description

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The BT20A Pro compact Bluetooth Stereo Power Amplifier by Fosi Audio

The Fosi Audio BT20A Pro is a compact Class-D Bluetooth stereo power amplifier designed to bring powerful and efficient amplification to passive speaker setups without taking up much space. It integrates Bluetooth 5.0 for wireless streaming from phones, tablets, or computers, plus RCA inputs for traditional wired sources, making it versatile for modern home audio use. Built around a Texas Instruments TPA3255 amplification chip, the unit delivers clean, high-efficiency audio with low distortion and strong dynamic performance. Tone controls for bass and treble allow you to tailor the sound to your preferences or set them to neutral for original tonal balance. A pre-out port adds flexibility by allowing connection to a powered subwoofer or an external preamp stage. With its sleek metal enclosure and plug-and-play simplicity, the BT20A Pro is ideal for living rooms, desktops, or compact sound systems.

Specs:

• Product Type: Bluetooth-enabled stereo power amplifier (Class D)
• Amplifier Chip: TI TPA3255 high-performance Class-D chip
• Power Output: Up to 300 W × 2 @ 4 Ω (max)
• Supported Speaker Impedance: 2 – 8 Ω
• Frequency Response: 20 Hz – 20 kHz (±1.2 dB)
• Total Harmonic Distortion (THD): ~0.005 %
• Signal-to-Noise Ratio (SNR): ≥ 108 dB
• Inputs: Bluetooth 5.0 (SBC/AAC) & Stereo RCA
• Outputs: Speaker terminals for passive speakers; 3.5 mm pre-out
• Bluetooth Range: Up to ~50 ft (≈15 m)
• Tone Controls: Adjustable Bass & Treble with midpoint neutral position
• Power Supply: External adapter (typically 32 V 5 A) included
• DC Input Range: 24 V – 48 V
• Dimensions & Weight: Compact design (approx. ~166 × 105 × 35 mm, ~547 g)
• Finish: Metal chassis (varies by model color)
• Included Accessories: Bluetooth antenna, power adapter, AC power cable, user manual

Videos

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Andrew Robinson

The Hidden Costs of CHEAP AMPS!

Andrew Robinson

Fosi Audio BT20A Pro Mini Amp TPA3255 Review and Power Output Test

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Fosi Nailed It / NEW BT20A Pro Amp Review

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Fosi Audio BT20A Pro is a Bluetooth Amp that Powers ANYTHING

Z Reviews

How it sounds? BT20A Pro with Various Op-Amps Demonstration

Fosi Audio

Six NEW features to LOVE on the Fosi Audio BT20A Pro!

Forever Analog

From Bluetooth to RCA: Testing the Fosi Audio BT20A Pro Amplifier

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Reviews

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Critic Reviews

The Fosi BT20A Integrated Amp Reviewed

futureaudiophile.com

Fosi Audio's BT20A Pro is a budget-friendly powerhouse, delivering impressive 150W output with a Texas Instruments chip, especially when paired with the optional 48V power supply. It shines with Bluetooth 5.0 connectivity, swappable op amps, and efficient energy use. However, its lack of a remote and limited speaker connector options could be drawbacks for some. Despite these minor flaws, its sound quality and adaptability make it a standout choice for audiophiles and beginners alike. For under $100, it offers a remarkable entry point into quality audio, making it a great value for small to mid-sized setups.

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Fosi Audio BT20A Pro Review - Prime Audio Reviews

primeaudio.org

The Fosi Audio BT20A Pro shines with its potent sound and sleek design, delivering impressive audio quality for its sub-$100 price. With bass and treble controls, a small footprint, and Bluetooth capability, it’s perfect for modest setups. However, lack of aptX or LDAC support and absence of a remote might deter some audiophiles. Overall, this compact powerhouse offers exceptional value, making it a top pick for budget-conscious music lovers.

positive

Full Review

Rehearsals Refined The Fosi Audio BT20A Pro Amplifier - PC Perspective

pcper.com

Fosi Audio's BT20A Pro amplifier punches above its weight, delivering Hi-Fi performance without the high price tag. Upgraded from the BT20A, it sports superior channel separation and immersive sound, though audiophiles seeking Dolby or aptX might be disappointed. Featuring Bluetooth 5.0 and a versatile 3.5mm pre-out, it offers surprising flexibility for its size. The copper volume knob is a nice touch, but beware its 300W power that can overwhelm unsuspecting speakers. While its real-world wattage might not match the marketing claims, the BT20A Pro excels at bringing out the nuances in quality audio tracks, making it a smart choice for budget-conscious music lovers.

positive

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