Tidal vs ATC

Big active ATCs are awesome speakers.  I haven't heard Tidal.  In my opinion you should consider having a couple of pairs.  One pair that excels at big dynamics and that you can play loudly, and another pair that excels at reproducing acoustic music that isn't extremely loud and doesn't have massive amounts of very low bass.  That's what I ended up doing and I couldn't be happier with how it turned out.  I've got a pair of active ATC 110s that I can crank up without any hint of strain or distortion.  I've got another pair of Thiel 3.7s in another system and they excel at acoustic music.  Imaging is incredible and the presentation is incredibly natural.  The Thiels are clear winners at the things they do best but can't hope to compete with the ATCs in the areas they excel in.  And I didn't spend a fortune on either pair, got both pairs for 12k total.  

I don't have a problem with low bass, I just think it's difficult to impossible to have a speaker excel at everything.  The ones that can play extremely loudly without distortion need stronger, heavier drivers that in my experience aren't as convincing on small scale acoustic music at low/mid volume.  My Thiels are an example of a speaker that is incredible within their capabilities but they won't play anywhere near as loudly as the big ATCs will.  Both speakers are very good at everything but definitely have areas where they are especially outstanding.

@douglas_schroeder I think a gradual rolloff starting at a higher frequency is better in most situations.  Most rooms will provide too much gain in the bass and a speaker that's flat to 20 hz will have massive humps.  A speaker that starts to roll off at a higher frequency will cause far fewer room problems.  Speakers with huge drivers like the ATC 300 provide massive punch, scale, and dynamics but are also forgiving of room placement, partly because of that gradual roll off in the bass.  You don't want to be have to compromise the ideal speaker placement because the room interaction is causing unbearable bass problems.

@kenjit  It's better to let the main speakers roll off, use a sub or subs to fill in the bottom.  Most people would prefer to not have an eq in the main signal path and one that is transparent will be expensive.  It's better to eq sub frequencies only, where the quality of the eq doesn't much matter and a cheap one is fine.