Horrible article.
While the author details things differently inside the text, his presentation of information is easily seen as biased. Moreover, using YT Vids as reference is insulting when an educated author could cite actual professional writing and science to support their writing.
While often times people make these assumptions, it is important to keep the physics in mind. Low frequency soundwaves are considered by most to be omni-directional. Below about 110-120 Hz, the frequencies a Subwoofer produce are not able to be "localized" in a room of reasonable size. To say that a Front Firing Driver does not bounce off the floor is completely wrong. Consider, too, that when you are dealing with wavelengths ranging from 55Hz (20.46') and down (20Hz =56.26'; 15 Hz =75.02'), these wavefronts will be bouncing off of multiple surfaces before fully propagating one full cycle.
I mentioned above in my first post that not all Drivers are suited for Down Firing applications and that it requires the proper Suspension to function properly. A well designed Down Firing Sub will have taken this little bit Physics into account.
I've seen several anecdotes about experienced cats even turning their Front Firing Subs in to face directly at a wall for various reasons, most commonly that it changes the way the wavefronts interact with the room.
Further, to claim a Front Firing subwoofer is more "accurate" is likewise abject hogwash for the same reasons stated above. Driver and Cabinet design, and the proper construction of the cabinet will have far more an effect on accuracy.
I'm still a novice in my path toward learning Speaker Design with a little over a year of studying under my belt, but I've read enough real literature to see this guy is blowing smoke and should stick to flowery Speaker Review Prose rather than attempting to educate others.
