Patent ID: 8430201

Claim:
An enclosure comprising: a large chamber having a driver wall and having a large chamber volume; a small chamber adjacent said large chamber and having a small chamber volume, said small chamber comprises a first small chamber brace and a second small chamber brace, wherein said first small chamber brace and said second small chamber brace define: a center portion having a center portion volume; a first side portion having a first side portion volume; and a second side portion having a second side portion volume; and the volumetric ratio of said center portion to the sum of the first side portion volume and second side portion volume is approximately 0.6 to 1.0; a baffle separating said large chamber and said small chamber, and a port, said port passing through said baffle, wherein the volumetric ratio of said small chamber to said large chamber is approximately 0.6 to 1.0.