A01 Pro
amplifier
$65
Used market: $45*
Specifications
3 of 6 values have a recorded sourceExpert Audio Engineering Commentary
Headroom Notes
Two TPA3116 chips, one per channel in PBTL - a bridged-parallel arrangement, which is why AIYIMA claims a lower load limit for it than a single TPA3116 board would manage. The 80 W x 2 figure is quoted into 4 ohms only; the distortion figure on the page is taken at 1 W, not at 80.
What the datasheet actually says
Quoted verbatim from the manufacturer’s own page, with the date we checked it. We state what is printed, not what anyone intended by it.
«the speaker output can support the lowest energy to 2 ohm impedance (most of the market is a TPA3116) — Speaker impedance: 4-8 ohms»
The feature list on the page claims the output supports loads down to 2 ohms, while the parameter table on the same page states 4 - 8 ohms. The two differ by a factor of two in load, which is the difference between an amplifier that survives a 3-ohm impedance dip and one that trips its protection. The parameter table is taken as the specification here.
checked 8/5/2026«Distortion: 4 ohm/1W/0.03％»
The distortion figure is measured at 1 W, one eightieth of the rated output. In class-D amplifiers distortion rises steeply as the output approaches clipping, so a value taken at 1 W says nothing about behaviour at 80 W and cannot be used as the condition of the power rating.
checked 8/5/2026* Estimated with the depreciation fallback (~69% retained value). · checked on 8/5/2026