Hi, of course, the reason why I didn't reply is because I sent these questions to our PD last week and am waiting for their results.
Today they sent me their test.
1) Under the condition of mono-channel continuous 300W (4 ohms) output, the A100 worked for 33 minutes, the power attenuation did not exceed 1W and the surface temperature was 39℃, and the test was finally terminated due to overheating of the load.
2) On 1%THD, the maximum output is 183W under 4ohm, using the default DC48V/5A power adapter. Please see the first pitcure.
3) Frequency response comparison @4ohm vs 8ohm load, please see the second picture.
View attachment 379946
View attachment 379947