Cement is only an ingredient of concrete. So these are not made of "pure cement" because that would just be a pile of powder, which wouldn't resonate all that well. This is a cool project, I'm curious about sound quality though. Sound absorbing insulation inside?
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chaser24 @ Jan 23rd 2007 9:52PM
Cement is only an ingredient of concrete. So these are not made of "pure cement" because that would just be a pile of powder, which wouldn't resonate all that well. This is a cool project, I'm curious about sound quality though. Sound absorbing insulation inside?