Regarding longer low frequency wavelengths and room size - when I was recently testing many highly regarded and top tier speakers, with my amp, I was failing to find any speakers that clicked for me. Most sounded too thin in the upper mids to my ear. At the top of my audition list was the Magico A5’s. I wanted to love these, as I thought the form factor was great and I thought the three large bass drivers would be well suited to my large room with high ceilings. I had read that these speakers had excellent, almost subwoofer level bass and Stereophile’s review stated that bass was actually over-emphasized, even in their larger test room. I was prepared to be blown away and buy them on the spot.
But they sounded like crap, and had laughable bass! And here is where room size comes in. The sales guy said that the tiny audition room might be too small for the long wavelengths put out by the A5’s. Also that they only had 250 hours of run time. Also that “you are just not used to a sealed, non-ported speaker design.” Could be all true, but now I’m wondering if it might have entirely been the small room not allowing the bass to reflect.