Multiple porting loudspeaker systems

An improved ported loudspeaker system comprising,

• electroacoustical transducing means having a vibratible cone,
• enclosure means for supporting said electroacoustical transducing means for converting an input electrical signal into a corresponding acoustic output signal, dividing means coacting with said electroacoustical transducing means for dividing the interior of said enclosure means into first and second subchambers with a first surface of said electroacoustical transducing means contacting said first subchamber and a second surface of said electroacoustical transducing means contacting said second subchamber,
• first and second passive radiating means each characterized by acoustic mass for coupling said first and second subchambers respectively to the region outside said enclosure means,
• said first subchamber and said first passive radiating means configured for establishing a first resonance at a first bass frequency for minimizing excursion of said cone at said first bass frequency,
• and said second subchamber and said second passive radiating means configured for establishing a second resonance at a second bass frequency for minimizing excursion of said cone at said second bass frequency.