Abstract: A water resistant speaker having a water-impermeable spider and an acoustic chamber in air flow communication with the underside of the spider via vents in a spider support and in a bottom panel of a basket of the speaker. The acoustic chamber is attached and sealed to the bottom of the basket. At least one hydrophobic vent is supported in the wall of the acoustic chamber or in the basket behind the spider to limit air pressure in the acoustic chamber. The acoustic chamber may have a passive radiator. The combination of a water impermeable spider and diaphragm, adjacently attached and sealed to the former, assist in preventing water from reaching the magnet assembly and voice coil. A vent in the pole piece, leading to the acoustic chamber, reduces drag on motion of the former, dust cap, and diaphragm.

Abstract: A water resistant speaker having a water-impermeable spider and an acoustic chamber in air flow communication with the underside of the spider via vents in a spider support and vents in a bottom panel of a basket of the speaker. The acoustic chamber is attached and sealed to the bottom of the basket and is watertight. The acoustic chamber may have a passive radiator. The combination of a water impermeable spider and a water impermeable diaphragm, adjacently attached and sealed to the former, assist in preventing water from reaching the magnet assembly and voice coil. A water impermeable dust cap is attached and sealed to the diaphragm to prevent water from entering around the former. A vent in the pole piece, leading to the acoustic chamber, reduces drag on motion of the former, dust cap, and diaphragm.

Abstract: A water resistant speaker having a water-impermeable spider and an acoustic chamber in air flow communication with the underside of the spider via vents in a spider support and in a bottom panel of a basket of the speaker. The acoustic chamber is attached and sealed to the bottom of the basket. At least one hydrophobic vent is supported in the wall of the acoustic chamber or in the basket behind the spider to limit air pressure in the acoustic chamber. The acoustic chamber may have a passive radiator. The combination of a water impermeable spider and diaphragm, adjacently attached and sealed to the former, assist in preventing water from reaching the magnet assembly and voice coil. A vent in the pole piece, leading to the acoustic chamber, reduces drag on motion of the former, dust cap, and diaphragm.

Abstract: A water resistant speaker having a water-impermeable spider and an acoustic chamber in air flow communication with the underside of the spider via vents in a spider support and vents in a bottom panel of a basket of the speaker. The acoustic chamber is attached and sealed to the bottom of the basket and is watertight. The acoustic chamber may have a passive radiator. The combination of a water impermeable spider and a water impermeable diaphragm, adjacently attached and sealed to the former, assist in preventing water from reaching the magnet assembly and voice coil. A water impermeable dust cap is attached and sealed to the diaphragm to prevent water from entering around the former. A vent in the pole piece, leading to the acoustic chamber, reduces drag on motion of the former, dust cap, and diaphragm.

Abstract: An improved shallow speaker is disclosed having a molded diaphragm with an outer, depending, annular cylindrical subcone that connects to a channel formed in the outer perimeter of the spider. Embodiments for round and cornered (polygonal, etc.) speakers are provided. The top plate has a raised outer annular portion for receiving an annular spider flange with or without screw holes for clamping the inner spider flange with a spider ring. In the cornered speaker embodiments, flanges extend from the cylindrical portions to the cornered portions including from a diaphragm inner glue flange over the depressed central portion and from the annular cylindrical subcone both outwardly and inwardly to top diaphragm portions. Routing of the tinsel may be through one or more openings in the annular cylindrical subcone and along the diaphragm inner surfaces, with channels in or on those surfaces for securely routing the tinsel.

Abstract: An improved shallow speaker is disclosed having a molded diaphragm with an outer, depending, annular cylindrical subcone that connects to a channel formed in the outer perimeter of the spider. Embodiments for round and cornered (polygonal, etc.) speakers are provided. The top plate has a raised outer annular portion for receiving an annular spider flange with or without screw holes for clamping the inner spider flange with a spider ring. In the cornered speaker embodiments, flanges extend from the cylindrical portions to the cornered portions including from a diaphragm inner glue flange over the depressed central portion and from the annular cylindrical subcone both outwardly and inwardly to top diaphragm portions. Routing of the tinsel may be through one or more openings in the annular cylindrical subcone and along the diaphragm inner surfaces, with channels in or on those surfaces for securely routing the tinsel.

Abstract: An adjustable terminal is disclosed having a plurality of electrical contacts electrically coupled between a corresponding number of pair-wise electrically-coupled input terminals and output terminals. A plurality of mechanically coupled jumpers are operable to pair-wise jump the electrical contacts to reconfigure the adjustable terminal variously for bi-amplifier output, parallel output, and series output at said output terminals. A housing is disclosed having support for the electrical contacts and for the jumpers, as well as labels for inputs, outputs, and current configuration. The jumpers may be mounted to a slider card that is movable between three positions to provide terminal reconfiguration.

Abstract: A speaker cone and dust cap assembly for a speaker is disclosed having an acoustic web for a dust cap that has a lower surface with a convex shape; a speaker cone with an end web, sized and arranged to close the first end of the former distal the magnet assembly of the speaker, the end web comprising a concave surface shaped conformally with a central portion of the lower surface of the acoustic web; and having the end surface of the end web fixed to the central portion of the lower surface of the acoustic web over substantially the entire surface of the end surface of the end web. The speaker cone may have a cylindrical extension wrapping the first end of the former. The cylindrical extension and the first end of the former may have aligned vents.

Abstract: An adjustable terminal is disclosed having a plurality of electrical contacts electrically coupled between a corresponding number of pair-wise electrically-coupled input terminals and output terminals. A plurality of mechanically coupled jumpers are operable to pair-wise jump the electrical contacts to reconfigure the adjustable terminal variously for bi-amplifier output, parallel output, and series output at said output terminals. A housing is disclosed having support for the electrical contacts and for the jumpers, as well as labels for inputs, outputs, and current configuration.

Abstract: A novel shallow speaker has a novel spidercone coaxial with and optionally having a radially inner spidercone flange suspended in a circumferential adhesive well affixed to the former. An inner rearward flange of the flat annular diaphragm is suspended in the circumferential adhesive well and the well is filled with epoxy. The spidercone has a frustroconical portion having a minimum radius smaller than the maximum magnet assembly radius and a maximum radius greater than the maximum magnet assembly radius. The spidercone has a spider portion integral with the larger end of the frustroconical portion and attachable to the basket by a tangential flange. The tinsel is interwoven with the spidercone in a way that reduces the risk of breaking and shorting. The diaphragm is substantially flat and coplanar with the top edge of the narrow surround when at rest.

Abstract: A square speaker is disclosed having a novel surround with a novel rounded corner design and with a magnet assembly and former sized, shaped, and arranged to exploit the increased excursions enabled by the novel surround. The arcuate portion of the rounded corner features smoothed trapezoidal circumferential undulations of the radially outer portion and an extension pad forms the arcuate portion of the radially inner portion of the rounded corner. An apex groove separates the inner portion from the outer portion. Tapered protrusions of the outer portion flank the smoothed trapezoidal circumferential undulations. The rounded corner is bounded by edges making angles of between 20 degrees and 40 degrees (preferably about 35 degrees) with straight sides of the square surround. Most of the outer perimeter of the entire inner flange adjoins the inner portions of the rounded corners. Significant increases in volume displacement per speaker size are achieved.