Aiyima A70vsFosi Audio ZA3
A detailed side-by-side comparison of the Aiyima A70 and Fosi Audio ZA3 — two popular amplifiers in the Chinese HiFi space.
Specifications
Spec
Aiyima A70
Fosi Audio ZA3
Class
D
D
Chipset
TI TPA3255 (with PFFB)
TI TPA3255
Topology
Stereo / Mono Bridgeable
Balanced Stereo / Mono
Power
2 × 300W (4Ω) / 1 × 480W (Mono)
155W x 2 (4Ω)
Inputs
RCA, XLR
RCA, XLR
Features
Subwoofer Output (Low-Pass Filtered), GaN Power Supply
Subwoofer Out, Trigger Input (dependent on revision), Op-Amp Rolling
Remote Control
✗
✗
Tube Stage
✗
✗
Price (estimated)
Price
~$128
~$132
Difference
~$4.00 cheaper (Aiyima A70)
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 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.
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