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

Ideas, ideas, ideas!  This leads me to think of horn speakers.  Have someone cup their hands around their mouth and talk to you - it doesn't sound ANYTHING like them talking to you without their hands cupped around their mouth!!!  WHY, WHY would you want that effect in your hi-end audio system???  TOTALLY UNNATURAL!!  Horns are fine if accuracy is not a requirement or you just want to fill an auditorium with sound - but, to me, NOT for music!  Another concept from the past that has fueled a company to be a "great seller" is Amar Bose and his direct-reflecting speaker concept.  When have you EVER been to a concert/music presentation where the performer(s) and their equipment were turned around to face the back of the stage, save for one or two pieces of equipment for direct play to the audience - NEVER!!!  We won't get into the ridiculous 901 speaker design here! the unconscienable joke that it was!  But yet Bose is a top-selling brand!      Sorry for the divergent rant - all this talk about speaker cabinets set me off!  and these are IMHO only!