Atlantic Technology - H-PAS Bookshelf Speaker - AT-2-S-GLFBuilding on the incredible success of the highly acclaimed AT 1, the compact AT 2 delivers a level of deep bass performance not previously attainable from a bookshelf sized loudspeaker. The AT 2's patent pending H PAS bass system (Hybrid Pressure Acceleration System) combines elements of several speaker technologies bass reflex, acoustic suspension, inverse horn, and transmission line in a unique configuration to deliver powerful low frequency