If I am not mistaken, in the 1st paragraph of JA's measurements, he states that he took the measurements, while the Khorn was on a dolly, in AD's driveway. Not that it matters. JA owns a pair of Altec 19s, and feels they are wonderful, if you read many of his columns. They are not even a full range horn, as an early example of a horn hybrid. An excellent speaker, but does have many flaws as well. As I write here, I cannot help but think, the tremendous influence PWK has had, not just at the Klipsch company, but with so many other horn manufacturers who are using folded horn designs. Those of you who know me from my posts, know I go way back with Klipsch, as a fanboy, and modifier. They are easy to modify, and with these modifications, the inherent flaws can be eliminated. I have not seen, nor heard, a speaker product, at all price ranges, that could not benefit from a modification or two, to bring it's sq performance to a higher level ( and not just speakers ). My 1st introduction to Khorns, was at the home of a music teacher / choral director of mine, and I was blown away. I wasn't quite 10 at this time, and it was during the time my dad had AR3as, which were wonderful to me. That experience captured my ears, my brain, my heart, and my soul. There was no turning back for me. It was during this time that I realized my dad's Fisher 500C, was not adequately driving his ARs. He purchased, with my recommendation, a Sansui 881 Deluxe, which brought the ARs to life, and I, acquired his 500c, to drive my Klipsch Cornwalls ( I bought them from my teacher ). Over the years, I owned so many other designs, plus, being in the audio business from my late teens, and on, I appreciated all the other speakers ( equipment in general ) I had available to me. Being around, and involved, with live music, I realized, there was a lot of " hifi " stuff, but listening through my CWs, it was now music. And, to shorten this up, moved into my own place at 19, got married at 25, bought my 1st house, with Khorns in perfect corners, had a son six years later, moved to a different house, sold the Khorns, got me Lascalas, with a pair of Janis woofers, and was happy again. I still own Lascalas, which I believe is my 7th pair ( sold the others ). Did I mention modifications ? Damping horns, bracing cabinets, upgrading crossovers.....yada yada yada. Sorry for my rant....last thing. I do not remember everything from my past, and do not want to get into why, but, anything, audio related, I remember. Enjoy ! MrD.