Designed to be much more rigid construction compared to all previous models AudioSolutions had produced. SBP plywood is used (Siberian Birch Plywood) for internal labyrinth structure as well as for sidewalls and curved top. Siberian Birch grows slower than simple birch, thus making it much denser and tighter. Whole structure is modeled with best software available for resonance free surfaces. Actually properties of our cabinet from SBP plywood results in structure which properties are better than aluminum.