Aiyima A70vsFosi Audio BT20A Pro
A detailed side-by-side comparison of the Aiyima A70 and Fosi Audio BT20A Pro — two popular amplifiers in the Chinese HiFi space.
Specifications
Spec
Aiyima A70
Fosi Audio BT20A Pro
Class
D
D
Chipset
TI TPA3255 (with PFFB)
TI TPA3255
Topology
Stereo / Mono Bridgeable
—
Power
2 × 300W (4Ω) / 1 × 480W (Mono)
2 × 300W @ 4Ω
Inputs
RCA, XLR
RCA, Bluetooth 5.0
Features
Subwoofer Output (Low-Pass Filtered), GaN Power Supply
Tone Controls with center detent (bypass), Pre-Out
Remote Control
✗
✗
Tube Stage
✗
✗
Price (estimated)
Price
~$128
~$76
Difference
~$52.00 cheaper (Fosi Audio BT20A Pro)
Things to Know
Aiyima A70
- ⚠Volume taper is extremely aggressive; it gets very loud very early on the dial.
- ⚠The subwoofer output is active but does not high-pass the main speakers.
- ⚠Heat dissipation is passive and the case can become uncomfortable to touch during extended high-output sessions.
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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