Fosi Audio BT20A ProvsFosi Audio TB10D (Upgraded)
A detailed side-by-side comparison of the Fosi Audio BT20A Pro and Fosi Audio TB10D (Upgraded) — two popular amplifiers in the Chinese HiFi space.
Specifications
Spec
Fosi Audio BT20A Pro
Fosi Audio TB10D (Upgraded)
Class
D
D
Chipset
TI TPA3255
TI TPA3255
Power
2 × 300W @ 4Ω
2 × 300W (Max) / ~100W Clean @ 4Ω
Inputs
RCA, Bluetooth 5.0
RCA
Features
Tone Controls with center detent (bypass), Pre-Out
Bass and Treble Tone Controls
Remote Control
✗
✗
Tube Stage
✗
✗
Price (estimated)
Price
~$76
~$70
Difference
~$6.00 cheaper (Fosi Audio TB10D (Upgraded))
Things to Know
Fosi Audio BT20A Pro
- ⚠Bluetooth is always active; anyone can pair with it if you don't disconnect.
- ⚠Tone controls can introduce slight phase shift even at center detent.
- ⚠Pre-out level is low compared to industry standards.
Fosi Audio TB10D (Upgraded)
- ⚠Volume control is logarithmic but very sensitive; gets loud at the 9 o'clock position.
- ⚠Tone controls lack a center detent, making it hard to know when you are truly 'flat'.
- ⚠DC input spark is common when plugging in the power supply (connect to amp first, then wall).
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