This was also true of my brief stint with active speakers including the KEF LS50w and ATCSCM 20 & 40’s. As well as a few others that have passed through.
I did not know that you had ATC SCM 20 & 40 ASLTs pass through.
I was somewhat excited to have a chance to hear the internally amped ATC SCM 40's (or 50's) at Axpona one year and it was a total letdown.
I remember asking the guy running the Demo if he was sure that the DSP on/off function was not reversed as I much preferred the non-corrected version.