Aiyima T9 ProvsFosi Audio BT20A Pro
A detailed side-by-side comparison of the Aiyima T9 Pro and Fosi Audio BT20A Pro — two popular amplifiers in the Chinese HiFi space.
Specifications
Spec
Aiyima T9 Pro
Fosi Audio BT20A Pro
Class
D (Hybrid)
D
Chipset
TPA3250 + Jan5725 Tubes
TI TPA3255
Power
2 × 100W @ 4Ω
2 × 300W @ 4Ω
Inputs
Optical, Coax, USB, RCA, Bluetooth
RCA, Bluetooth 5.0
Features
VU Meter (Active), Tone Controls, Remote
Tone Controls with center detent (bypass), Pre-Out
Remote Control
✓
✗
Tube Stage
✓
✗
Price (estimated)
Price
~$118
~$76
Difference
~$42.00 cheaper (Fosi Audio BT20A Pro)
Things to Know
Aiyima T9 Pro
- ⚠VU meter sensitivity is not adjustable; barely moves at low volumes.
- ⚠The tube stage adds measurable distortion (2nd harmonic), which is intentional for 'flavor' but not high-fidelity.
- ⚠Runs quite warm due to the tubes and internal DAC.
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.
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