The Fosi Audio BT20A Pro is a mini Class D stereo power amplifier built on the TPA3255 chip, with Bluetooth input and bass and treble controls. This is the 32V power supply version, the sensible pick for nearfield desktop use, smaller rooms and efficient bookshelf speakers a few feet away.
Who the Fosi Audio BT20A Pro is for
Nearfield desks and smaller rooms: The 32V version suits spaces where you will never ask the amp for everything it can give.
Efficient bookshelf speakers: Driving efficient bookshelf speakers a few feet away is exactly the job this version is meant for.
Wireless sources: The Bluetooth input lets the amp take a wireless source directly.
Hands-on tone shaping: Bass and treble controls let you shape the sound at the amp itself.
Skip it if: You're filling a larger space or driving harder loads; step up to the 48V version for that.
Fosi Audio BT20A Pro key specs
Amplifier chip: TPA3255
Amplifier type: Mini Class D stereo power amplifier
Amplifier rating: 300W x2
Power supply: 32V version
Input: Bluetooth
Tone controls: Bass and treble
Colors: Black, Blue
Free shipping on every order, 45-day returns.
Fosi Audio BT20A Pro vs similar options
vs Fosi Audio BT20A Pro 48V: Same TPA3255 amp, Bluetooth and tone controls, in the 48V power supply version. Keep the 32V for nearfield desks and small rooms; step up to 48V for larger spaces or harder loads.
Yes. Every unit we sell is genuine and brand-new, shipped in its original packaging, and backed by our 1-year TonePier warranty and 45-day returns.
Where does my order ship from, and how long does it take?
Every order ships from our warehouse in China, with full tracking, and most orders ship within 3 business days. Shipping is free on every order; most US orders arrive within 7–15 business days and most orders to other countries within 7–20 business days — see our shipping policy for details.
What if it isn't for me?
You get 45 days to decide. Keep the packaging, keep it in like-new condition, and send it back for a refund. Ear tips unsealed for hygiene reasons are fine — we expect you to actually listen.
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