Bookshelf Speakers Sitting On Dual Subs?

I had some Axiom M22TI bookshelf speakers I used in this manner and didn’t feel it was a negative. The dual subs help cancel standing waves, and as long as the tweeter height is satisfactory let your ears be the judge. I had used some Audioengine stands for my setup as they provided some tilt. I am running dual subs for my current setup but they live behind the primary speakers now, not under.

I have learned NOT to place dual subs in a stereo setup next to or under the mains EVER. It will result in overly booming bass specially in the rear of the room. Once placed on different walls at different positions, the extra booming was gone and they sounded THAT much better. You can see the exact placement that worked best for me under my handle in my house of stereo system. I learned that from a valuable member here. By the speakers was a losing battle.

Paul Mc Gowan sez dual subs at the main speakers is fine and preferred.  

https://www.youtube.com/watch?v=Pp-0vvqERAs

Paul Mc Gowan sez dual subs at the main speakers is fine and preferred.

well then, it's settled... that's the end of discussion then, right?

oh wait, he sells megabuck speakers with giant sub bass modules mounted just below the mains... doh!!!! 🤣😁

important in life to know when someone telling you something is to help you, or...

Do you have any idea how many extra resonances you create in Speakers by wiggling them around on a sub? 
iso stands are rubber and springs and wiggling jiggle