Fosi Audio ZA3vsWillsenton R8
A detailed side-by-side comparison of the Fosi Audio ZA3 and Willsenton R8 — two popular amplifiers in the Chinese HiFi space.
Specifications
Spec
Fosi Audio ZA3
Willsenton R8
Class
D
AB
Chipset
TI TPA3255
—
Topology
Balanced Stereo / Mono
Push-Pull
Power
155W x 2 (4Ω)
45W (Ultralinear) / 25W (Triode)
Inputs
RCA, XLR
—
Features
Subwoofer Out, Trigger Input (dependent on revision), Op-Amp Rolling
Remote Control, Bias Meter, Triode/UL Switch
Tubes
—
KT88 x4 (or EL34), 6SN7 x2, 6SL7 x2
Weight
—
29 kg
Remote Control
✗
✓
Tube Stage
✗
✓
Price (estimated)
Price
~$132
~$1449
Difference
~$1317.00 cheaper (Fosi Audio ZA3)
Things to Know
Fosi Audio ZA3
- ⚠Frequency response is load-dependent (high frequencies may rise with 8Ω loads due to lack of PFFB).
- ⚠The subwoofer output is full-range pass-through on the main terminals; it does not filter bass from the main speakers.
- ⚠Volume control is defeated in Mono mode, requiring a preamp.
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.
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