What about this GaN based amplifier? I just discovered this USA based company and know very little about their products.
”The AGD “TEMPO” Stereo Amplifier is the new addition to our state-of-the-art Hi-End Power Amplifiers family. TEMPO is our first compact Stereo Amplifier utilizing the same unique technology of Gallium Nitride Power-Stage design already in use with all its Hi-End AGD siblings. The AGD “TEMPO” is rated 200+200W 4Ohm (100W+100W 8Ohm). To achieve these performances in such compact CNC machined cabinet, we have designed a new GaN- based output power stage with a new mother board that contains the low noise power supply and all the analog buffer stages, small enough to enable these outstanding minimalistic footprint.