I have three AIYIMA A07's in my three setups purely as a power Amp and they are true value for money each powering the following speakers.

The TPA3255 is a high-performance Class D power amplifier with Class D efficiency and true to high-end sound quality.The Chinese manufacturers are simply stating the power output of the chips from the chip specs of Texas Instruments. This is odd because usually enabling those adds distortion, but once again, this is a problem with my phone and if it happens with yours, you know what to do. KLH Model Five can climb down nicely powered by A07 PRO, but the bass can be a bit overwhelming if I use the bass wheel past 3 o’clock. I would suggest opting for banana plugs when connecting your speakers since dealing with bare wires can be a bit tricky due to the closely placed terminals. If you use the PBTL method and connect the positive speaker terminals together, you will need a complicated switching circuit.

The treble wheel is necessary as well, since if you employ the bass wheel, the sound gets quite dark, veiled and muffled. In my setup, I utilized an empty coaxial socket on my external DAC to run a wire to the socket's ground.But it's of course dependent on your other equipment, your needs in terms of sound pressure and of course your tastes. Attention au voltage car les premières versions avaient des condensateurs de 50v un peu juste pour utiliser du 48v, pour ma part j'utilise l'alimentation 42v 8,5A Audiophonic sans probleme, cela chauffe tres peu. There were other competitors in this market but Aiyima iterated over the design of the A07 with the A08 and a number of other class D amplifiers adding more features like bluetooth / tone controls etc to the basic TPA3255 design.