Fosi Audio BT20A ProvsWillsenton R8
A detailed side-by-side comparison of the Fosi Audio BT20A Pro and Willsenton R8 — two popular amplifiers in the Chinese HiFi space.
Specifications
Spec
Fosi Audio BT20A Pro
Willsenton R8
Class
D
AB
Chipset
TI TPA3255
—
Power
2 × 300W @ 4Ω
45W (Ultralinear) / 25W (Triode)
Inputs
RCA, Bluetooth 5.0
—
Features
Tone Controls with center detent (bypass), Pre-Out
Remote Control, Bias Meter, Triode/UL Switch
Topology
—
Push-Pull
Tubes
—
KT88 x4 (or EL34), 6SN7 x2, 6SL7 x2
Weight
—
29 kg
Remote Control
✗
✓
Tube Stage
✗
✓
Price (estimated)
Price
~$76
~$1449
Difference
~$1373.00 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.
Willsenton R8
- ⚠Bias drift is common; owners need to check and adjust bias frequently during the first few months.
- ⚠Stock preamp tubes (6SN7/6SL7) are often noisy or microphonic; immediate replacement is recommended.
- ⚠Extreme weight makes shipping it back to China for warranty claims financially impossible.
* As an affiliate, we may earn a small commission from qualifying purchases — at no extra cost to you.
Related Comparisons
Fosi Audio BT20A Pro vs Fosi Audio V3 MonoWillsenton R8 vs Fosi Audio V3 MonoFosi Audio BT20A Pro vs Aiyima A70Willsenton R8 vs Aiyima A70Fosi Audio BT20A Pro vs Fosi Audio ZA3Willsenton R8 vs Fosi Audio ZA3Fosi Audio BT20A Pro vs Aiyima A07 MaxWillsenton R8 vs Aiyima A07 MaxFosi Audio BT20A Pro vs Loxjie A30Willsenton R8 vs Loxjie A30Fosi Audio BT20A Pro vs SMSL AO300Willsenton R8 vs SMSL AO300