High fidelity loudspeaker system

Abstract

A high fidelity loudspeaker system involving a multidriver, semi-omnidirectional, full range, electrodynamic loudspeaker including two, separate but complementary, closed box-like enclosures, an upper unit containing an array of mid-range speakers around three sides and a lower unit containing arrays of low and high frequency speakers around three sides. The low frequency speakers (woofers) on their interior sides include a series of tubes opening into the closed interior of the speaker enclosure, having various lengths in accordance with certain relative, locational relationships. Although the low and high frequency speakers include a single crossover frequency circuit, the 'mid-range' speakers are not included in any crossover network but are driven throughout the total frequency input range, although a capacitor can be included to cut off the very low frequencies to the mid-range speakers. The number of speakers in the arrays in each unit can be varied, but in the lower unit the over-all speaker panel sizes remain the same with the speaker locations on each panel being made asymmetrical about the horizontal center-line, allowing for alternative, up-or-down placement. A protective outer case about the cabinet can be included having hinged wall sections, which also serve when opened out as reflective surfaces, providing a 'built-in corner' (FIG. 10). For easy mobility, a handle and rollers can be provided on the back of the unit (FIG. 9). Terminal strip and electrical hook-ups are provided on the exterior of the speaker allowing flexible application and use (FIGS. 7-7C).