ATC and Loki


Let me start by acknowledging that I don’t know what I’m talking about, which is why I am asking this question.
 I have ATC scm 40s and a Loki in the mail to me. I’m looking to adjust EQ because of an overly bright room and some low level listening.
I’ve heard that some speakers need a boost in certain frequency ranges even in a perfect room. I’ve also heard that Atc‘s have an especially flat response and may not fit that category. Any ideas about how to adjust the loki or how all these elements interact would be welcome.
128x128m669326
BTW, another equalization option is a very good sounding 6SN7 based line stage with useful equalization, especially in the bass region and fun spatial controls both of which can be bypassed. Black Ice Audio Fusion F360. They also offer these circuits in a stand alone device that can be inserted in your tape loop, Foz SS-X.

Just be aware that such things are not approved by the audio police.
How do you properly solve the problem of speakers not sounding right because they're not being played at accurate volume?  
I'm trying to make an abstract argument rather than personalize this and I don't think my personal experience is all that relevant.  I've got a few systems.  I've got ATC 110s in a family room system, Thiel 3.7s in what I'd call a den I guess, and also some Vienna Acoustics Mozart Grands I use as computer speakers.  

How do you properly solve the problem of speakers not sounding right because they're not being played at accurate volume?  Our ears don't hear all frequencies equally so what sounds right at 90db sounds bland at 80.  I agree that EQ is a good way to mitigate this.  My Thiels sound better at low volume than my ATCs.  I'd guess because there are design tradeoffs between speakers that need huge dynamic range and those designed for moderate max volume.  
OP here.
JON, your understanding of this matches my understanding of this, and I appreciate your efforts to keep comments impersonal. By that, I don’t mean to vilify anyone who is taking a different approach. I’m just commenting on what I appreciate.
I am in no way trying to comment on any objective reality in relationship to acoustics or speakers or ears or anything along those lines. I have no expertise with things like that. I’m working on the basis of my own ears and my own speakers in my own room and making surmises about what’s going to work best for me, hoping that others have been down this road and can share things that I will find helpful.I understand that there are various elements in this topic that are debatable and that debate is often fun or Educational, so I don’t mind if anyone wishes to continue this thread along these lines because that has value for them, if not for me.