Same cabinet design is also use by Boston Acoustics M Series Lo-Q Cabinet. May be both companies are supply by same OE manufacturer because they came out around same time in 2012, it's a good design.
Boston M series is big bargain right now, top of the line M350 towers can be had for less than $700 for a pair with free shipping.
Lo-Q Construction to Limit Vibrations
The M350 has a cabinet made of Lo-Q, a material consisting of two pieces of medium-density fiberboard joined together with a thick layer of damping adhesive in the middle.
Boston Acoustics M series Presented by Ken Ishiwata.