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.
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I don't mean they lack accurate bass, just that they sound like they do at low listening levels.  It only makes sense for accurate reproduction at inaccurate levels to sound inaccurate.  It is inaccurate.  You can make it sound more accurate by countering the level distortion with frequency response distortion but true accuracy would include accurate volume.  A lot of speakers have some exaggerated bass, at least at low volumes, and they sound better at low volumes because of it.  
Who are they? Which ones have you auditioned, set up and powered properly?

Exaggerated bass at any volume, which will compromise sound quality at higher volumes, is not the solution.

For those that can not or will not solve the problem properly, I would much prefer a good equalizer which can be adjusted at low volumes than a speaker that is designed to have exaggerated bass at low volumes.
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?