AIYIMA A07 review

This test review was performed to comply with FTC: 16 CFR Part 432 (July 5, 2024) - Power Output Claims for Amplifiers Utilized in Home Entertainment Products

The Aiyima A07 is a small, affordable, 2-channel Class D amplifier. It embeds a TPA3255 amplifier chip. The inputs are in stereo RCA or on Jack 3.5mm. In addition, it is equipped with two upgraded LM4562 operational amplifiers with excellent performance.

1. Test conditions

The amplifier was tested with a 48Vdc SMPS power supply and 8ohm load. As per the manufacturer, output power depending on the power supply voltage should be as follows:

So, with the 48V power supply, the claimed rated power would be 180W/8ohm.

2. Pre-conditioning

First of all, the amplifier was pre-conditioned at 1/8 of the rated power with 48V power supply into 8ohm load.The distortion in the beginning of the pre-conditioning is shown below.

The test should have been performed for 1 hour, however the amplifier shut down after only 12 minutes. With preconditoning at 2 x 20W, the amplifier failed in 14 minutes, with 2 x 10W it failed in 54 minutes. The thermal design of this amplifier is miserable and inadequate to be used with 48V power supply.

3. Short-term maximum power

Despite the fact that the amplifier failed in the preconditioning, and even if the power was reduced to 2 x 20W, short-term maximum power with the level stepped sine (0.8s burst, 0.5s interval) was measured. The result is below, 2 x 112W / 8ohm.

4. Conclusion

The amplifier failed to pass pre-conditioning requested by the FTC regulation. It failed to pass the FTC power test.

Pavel Macura 12/11/2024