Twb2,
"concrete blocks"? Might work if you're a guy living a 'frat house" or in your Mom's basement, but if you're married with children you're going to need something a little more refined (WAF friendly). Hopefully you weren't being serious with your suggestion, as it's so 1970's hippy burnout (and yes, back in my hippy days I had my speakers setting on top of some "concrete blocks"), and I doubt that nowadays anyone would "dare" put the "concrete block" speaker stands in their living/family room, unless they were going for that "'po white trash trailer park" look.