I'm interested in this Aiyima amp. I bought a Tripath amp based on Rolox's recommendation. It sounds lovely with my Closer Acoustics OGY. But I wish I had more power for orchestral music. With other music it's plenty loud.
With the A-07 one uses more or less voltage in the form of the SMPS to get higher wattage.
50ish volts gets a few hundred watts, so I got one of those SMPS for the center channel.