Fosi Audio BT20A ProvsFosi Audio V3 Mono
A detailed side-by-side comparison of the Fosi Audio BT20A Pro and Fosi Audio V3 Mono — two popular amplifiers in the Chinese HiFi space.
Specifications
Spec
Fosi Audio BT20A Pro
Fosi Audio V3 Mono
Class
D
D
Chipset
TI TPA3255
TI TPA3255 (with PFFB)
Power
2 × 300W @ 4Ω
240W @ 4Ω (48V/5A supply)
Inputs
RCA, Bluetooth 5.0
RCA, XLR / ¼” TRS
Features
Tone Controls with center detent (bypass), Pre-Out
Auto-Standby, 12V Trigger, Gain Switch (25dB/31dB)
Topology
—
Monoblock
THD / SINAD
—
-120 dB (SINAD via XLR)
Remote Control
✗
✗
Tube Stage
✗
✗
Price (estimated)
Price
~$76
~$131
Difference
~$55.00 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.
Fosi Audio V3 Mono
- ⚠Chassis gets significantly warm due to the compact thermal design coupled with high power density.
- ⚠Auto-standby feature produces a mechanical 'click' that some users find audible in quiet rooms.
- ⚠Requires two separate power bricks (or a specialized splitter) for a stereo pair, adding cable clutter.
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