One 10″ 8 Ohm 450 watt Eminence Kappalite 3010LF Neodymium driver 

Proprietary anti-diffraction coupler ring

12″ low frequency passive radiator with 360 degree tuned porting

Cabinet material: Advanced Polymer

Cabinet shape: Half-sphere, providing great and even rigidity with minimum weight.

Dimensions: 18″/45.8 cm diameter x 9″/22.9 cm height

Weight: 15.5  lbs./7 Kg.

The B18 response curve: smooth and even low frequency response. The B18’s driver is 82dBSPL at 80hz. At that point, function transfers over to the passive radiator.  The passive radiator begins to function well at 85hz with a dBSPL of 83, and maintains excellent response for the B18’s 0.85 ft. cu cabinet size, being 65dBSPL at a low B’s 32hz. At the top end, the driver is 94 dBSPL at 2,800hz and still functioning well at 4,000hz with a dBSPL of 84hz. To be clear, the B18 does not have low end dBSPL numbers as high as some larger cabinets, yet is quite efficient for its dimensions.  Regardless, above 4,000hz the drivers response drops off quite fast. A carry gig bag is included.