Concrete Audio Speakers...Speaker Enclosures made out of Concrete ?..

"The enclosure was poured in the basement and the drivers mounted in the floor."

Didn't kenjit already propose something similar?

Wow,guys here are talking about Bose 901s here...what do they have to do with these speakers  ,other than a different idea.

Why wouldnt concrete enclosures be excellent? 

Because they are not thick enough and they are too resonant. You want something that doesn't ring when you tap it. 

I am not talking about these speakers specifically but rather concrete enclosures in general. Are you suggesting that any thickness of concrete will ring? Hard for me to think of a better, relatively inexpensive material to use in a speaker. I will await your solution and response.