I Was Considering Active, Then I Watched This ...


high-amp
Even with actives it's good to get the best FR , to me that's the flattest, with placement and acoustic treatment before using room correction. My room isn't that bad I've only used a few filters below 200hz on passives and actives I've had. 
djones51 -  the A500 the A700 are different you can't interchange them

Gee, I didn't pick-up on that, thanks for pointing it out.
No one talks about ABx for speakers because the sonic character is generally enough to easily match x to A or B. Of course AB speaker comparison is very difficult due to movement and positioning issues and accurate volume matching in room without suitable tools or experience. It's almost silly bringing up.

Also silly is to use Legacy as an example, not the most accurate speakers at the best of time and no guarantee that the passive or the active versions are optimum and doubtful Legacy had the knowledge or experience to optimize an active crossover or if DSP, the ADC to be transparent.

The best would be to compare equal priced speakers considered state of the art in both genres and then compare the sound to very neutral headphones as the goal is not to determine what you "like" but what is most accurate. We are not judging flavor here but accuracy.
Thanks douglas_schroeder
HiFi Critic, a respected UK mag, did a comparison between the standard passive ATC 50 and the standard active 50 version.

http://atcloudspeakers.co.uk/wp-content/uploads/2019/10/ATC_SCM50ASL_Review_Hi-Fi_Critic_Sept_19.pdf

M Colloms slightly preferred the timing of the passive version driven by a £20k naim power amp. However the discrete anniversary amp pack is a significant improvement over the standard one used in the review.