Speaker systems and sound chambers therefor

Claim 1

IN A SOUND REPRODUCING APPARATUS A WALLED ENCLOSURE, ALL OF THE WALLS OF SAID ENCLOSURE BEING RIGID AND WITH RELATIVE HIGH SOUND ABSORBING CHARACTERISTICS, A BAFFLE PLATE, SAID BAFFLE PLATE BEING RIGID AND WITH CHARACTERISTICS SIMILAR TO THOSE OF THE ENCLOSURE WALLS, SAID BAFFLE PLATE EXTENDING FROM WALL TO WALL ACROSS THE INTERIOR OF SAID ENCLOSURE AND SUBSTANTIALLY MIDWAY BETWEEN THE OPPOSITE ENDS THEREOF AND DIVIDING SAID WALLED ENCLOSURE INTO TWO SEPARATE DISTINCT AND SUBSTANTIALLY IDENTICAL ACOUSTICAL CHAMBERS DIMENSION-WISE, ONE OF SAID CHAMBERS CONSTITUTING A FRONT LOADING RADIATING CHAMBER AND THE OTHER A REAR LOADING CHAMBER, SAID BAFFLE PLATE HAVING A THROUGH OPENING THEREIN CONSTITUTING A SOUND TRANSMITTING PASSAGE BETWEEN SAID ACOUSTICAL CHAMBERS, SOUND PRODUCING MEANS MOUNTED UPON SAID BAFFLE PLATE AND INCLUDING A DIAPHRAGM EXTENDING ACROSS SAID SOUND TRANSMITTING PASSAGE DEFINING AN ACOUSTICAL SEPARATION BETWEEN SAID ACOUSTICAL CHAMBERS, ELECTROMECHANICAL MEANS CONNECTED TO SAID DIAPHRAGM, A GRILL EXTENDING ACROSS A FRONT OPEN END OF SAID FRONT CHAMBER, AND A PANEL MOUNTED ON THE ENCLOSURE WALLS AT A REAR END OF THE REAR CHAMBER HAVING AIR VENT MEANS BETWEEN THE PANEL AND THE WALLS OF THE ENCLOSURE FOR VENTING THE OPEN END OF SAID REAR LOADING CHAMBER TO RELIEVE PRESSURE.