floor speakers installed on the wall.... ?

Speakers are JBL Synthesis 4367 , and House is typical frame build with exterior veneer brick. Inner wall drywall   
 

the question is how the structure will respond. As of now speakers stands ove the crawlspace do it is kind of guitar effect. I’m not going to change location of the speakers I’m jus trying to lift them off the floor. 

No I have not discuss any of the gear issues on FB

ok that is completely different issue. 

What I'm looking for is to separate them from the floor meaning the shelf will be fixed to the wall and space out from floor.

Issue of the materials or design or weight will be separate from what I'm asking for

Well I was expected that kind of reply to be honest with you 

The point of the question was to figure out if the bass will be more booming or more spaced out ?