Actually that low frequency "boost" you mention has more to do with the position of our listening plane (our ears) being close to the floor, consequently we are hearing the boundary effect on the low end response of the system. Our ears have grown accustomed to this phenomenon, hence why it's desirable to hear sound systems tuned this way. Get yourself a 12 ft stepladder, and listen/measure the system at a seated listening height vs. 12 ft in open space, and you will see a change in the LF, even a few dB.
Which opens up a measurement can of worms....put your measurement mics at ear height, so that you can see the boundary effects of the floor, but at the same time you're having to deal with the cancellations from the floor reflections you typically see in your measurement. It is more challenging to window out those reflections while getting sufficient resolution in the LF because the reflection path is relatively short. Or put the mics up really high off the floor, now you can window out the reflections without taking a "hit" on the LF resolution (because you can have a larger time window), but you no longer see the boundary effects in your measurement. Or simply use MTW in Smaart, put the mics at ear height (or do a ground plane measurement) and rely on the coherence curve to help you navigate your way around the limitations of your measurement.