Con­crete that ab­sorbs echoes


Popular Science - - BEST OF WHAT’S NEW 2017 -

Con­crete speak­ers are great for com­bat­ing rat­tle-in­duc­ing vi­bra­tions, but the trade-off is typ­i­cally un­wanted echo. This 35-pound Bru­tal­ist mono­lith has a ta­pered shape and is made from a pro­pri­etary blend of con­crete with poly­mers in the mix to dampen the re­ver­ber­a­tions. Sound comes cour­tesy of a pair of 4-inch wo­ven Kevlar long throw woofers and a 1.5-inch titanium tweeter em­bed­ded in the cab­i­net.

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