I heard the Box

@roxy54 , The only limitation a modern ESL has is in the very low bass. They will do it but it knocks the wind out of them. With subwoofers it is a whole different story. Not only will they go louder than most systems but they are as dynamic as any horn system. 

I think most of us who have been smitten by line source dipoles are loth to return to "box" speakers. After switching to ESLs from Allison 1's in 1978 I have never looked back. Since, I have had Tympanys, Apogee Divas, Acoustat 2+2s twice then my current Sound Labs where I plan to stay for the duration. 

I think if you start with a speaker as good as the Maggie 3.7i you will never look back. If you want more volume there is the 20.7 followed by the jump to Sound Labs. Less expensive dipoles and open baffle speakers have compromises that might make enclosed speakers preferable to some. Also, the science behind enclosures has advanced dramatically in the last 20 years. There are some very good point source speakers out there. 

Research "Tekna Sonic" vibration control panels. These devices stick to the sides of your boxy speakers and convert vibration into heat.
Long out of production, these need to make a comeback.

That is why some companies go to extremes to ’eliminate’ enclosure’s effect (i.e., Magico)

After listening to Townshend F1 speaker cables and interconnects I now am aware a lot of the sound of other wire is resonance coloring the sound of those wires. Pretty much all of them. After listening to Townshend Pods and Podiums it is now clear a lot of what we near from speakers and components is actually the stuff they are sitting on. It rings and this resonance gets back into the signal coloring the music. Immediately upon upgrading my crossovers it was apparent a huge amount of what I have heard from every other speaker anywhere ever was flattened, dulled, and distorted by the cheap crossover components everyone uses. When my panel was redone it was mind-blowing how much grunge is everywhere.

I never really got what people meant by cable elevators, until I tried them and now can never unheard that either. One time I left my system on all day, everything even the tubes, then listened late at night when everything sounds better, and now I can never unhear that.

Just thought I would share all this since we are like brothers, being able to remember what we hear. So many audiophiles claim not to be able to hear anything, or remember anything, they need instantaneously scientifically verified double-blind random interweb doubt rectification validation to even begin to consider maybe something could be different and just maybe possibly not just snake-oiltation bias. I always dreamed of meeting another who can actually hear these things. Even though it means you are like me doomed forevermore to the hell of hearing and remembering.

How will we ever cope with this horrible affliction? Guess we will just have to muddle along somehow. Just please, for now, give me a few more weeks of blissful ignorance before Rick comes and makes me acutely painfully aware of how horribly boxy my boxes sound.

It could be the floor more than the box you hear if floor is suspended plywood in which case use isolation pads or similar.