Fosi Audio BT20A ProvsTopping PA7 Plus
A detailed side-by-side comparison of the Fosi Audio BT20A Pro and Topping PA7 Plus — two popular amplifiers in the Chinese HiFi space.
Specifications
Spec
Fosi Audio BT20A Pro
Topping PA7 Plus
Class
D
D
Chipset
TI TPA3255
Proprietary / Modified Class D
Power
2 × 300W @ 4Ω
2 × 245W @ 4Ω (1% THD) / 2 × 300W @ 4Ω (10% THD)
Inputs
RCA, Bluetooth 5.0
XLR/TRS (Balanced), RCA
Features
Tone Controls with center detent (bypass), Pre-Out
Volume Bypass (Pure Power Amp Mode), 12V Trigger
Sinad
—
102 dB (excellent for Class D)
Remote Control
✗
✗
Tube Stage
✗
✗
Price (estimated)
Price
~$76
~$549
Difference
~$473.00 cheaper (Fosi Audio BT20A Pro)
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.
Topping PA7 Plus
- ⚠External power brick is massive and can be difficult to hide.
- ⚠Runs warmer than typical Class D amps due to high power density.
- ⚠No remote control (intended to be used with a preamp like the E70).
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