I have ATC SCM7’s second generation, new ATC SCM40’s, and still have ATC SCM35’s. The latter replace biamped Dahlquist DQ10’s with double subwoofers. I have listened to numerous other ATC models, both in the professional and consumer lines, some amplified versions.
I have never heard them sound as Kenjit describes with good source material. Never. I have heard lots of speakers sound cold and hard, though I won’t name any to avoid flame wars.
I do understand what Kenjit is trying to get across as an idea, although it is based on misconception.
I will also counter that the acoustic suspension of the consumer Entry series allows for easy room placement and avoids issues of room interaction with a ported design.