The Idea of flat is that you get all frequencys at the same sound level. That doesnt mean thats the way Music is recorded. I have a Mcintosh A2 it has a Fixed output pink/white noise or specific 1/3 octive test tones 20 to 20k
I use it to find the best speaker placement in my room and check for bass issue's. I do each speaker independant at 1 meter then do mono at my listening spot
I use it to find the best speaker placement in my room and check for bass issue's. I do each speaker independant at 1 meter then do mono at my listening spot