Free air, tighter bass - snake oil or cheap tweaks?

Back in the later 80’s during my first real chapter of high end audio, I had a pair of Conrad Johnson Premier One powered Duntech Marquis’s ( forerunner of Dunlavys) which were very good & only missing the last little bit of full low end extension of his Sovereigns which are still considered amongst the very best speakers ever made albeit huge & expensive. 
 

They were in a large living room in a rebuilt old New England  horse barn w/ solid oak T & G ceiling & just for kicks I decided to try to better couple the speakers to the tiled floor as the large speaker bases did not have spikes. I took one foot square  3/4” plywood w/felt glued on one side & cut 2x4’s to the exact needed length between the speakers & the ceiling.w/ the plywood pieces at each end. I slowly wedged the 2x4’s between the plywood pieces top & bottom. It was truly stupid looking but substantially improved the dynamics & especially imaging as well which that amp & speakers were very good at. I 
 

When my wife came home, she shook her head, laughed & gave me a look. Needless to say, my little experiment was over by the next day but it was fun while it lasted. 
 

Here is my snake oil advice:

If you live in a high humidity area, use a dehumidifier to keep humidity at 40 % or below. If humidity gets higher than 50%, the sound will become muffled. If you like clarity, keep the humidity low. It's for real on a revealing system and in a revealing listening room. It's so obvious in my house of stereo. Every time.

Your observation is correct, and it does seem counterintuitive. The speed of sound generally increases in less dense media, such as humid air compared to dry air. However, the perception of sound can be affected by various factors.

In the case of humidity, it might not necessarily cause the sound to be muffled directly. Instead, humidity can affect the absorption and dispersion of sound waves. High humidity can absorb some higher frequency components of sound, leading to a perception of muffled or dull sound.

Changes in weather conditions, temperature, and humidity can have complex effects on how sound behaves. While the speed of sound may be faster in humid air, other acoustic properties and environmental factors can contribute to the overall perception of sound. It's an interesting phenomenon, and your observation during the rainy season may provide additional insights into these acoustic effects.

@yesiam_a_pirate +1 “Dreaming about and working towards the "next thing" is sometimes more fun than the score.”

Banking back to being serious.....and perhaps an interesting query, @erik_squires 

What if I’ve an omni on a column, with nothing that could be considered a side?

All I could do is wrap the column itself...and have been considering a tapered column that would ’accentuate’ the taper of the Walsh drivers....

On a practical level, too top-heavy imho....

@classic8 ...no kidding...*L*