Loudspeaker system
First Claim
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1. A loudspeaker system comprising, in combination:
- a mid-range acoustic transformer including a flared, stepped elliptical horn with a mid-range driver therein;
a woofer having a diaphragm;
a mid-bass acoustic horn mounted below said mid-range acoustic transformer, said mid-range bass acoustic horn having said woofer with said diaphragm disposed on a rear wall thereof to provide said diaphragm with a positive operational impedance encountered by front loading, said mid-bass acoustic horn having at least two opposing curved walls;
a low-bass acoustic horn positioned directly beneath said mid-bass acoustic horn and having a folded horn interior section which communicates with rear of said woofer to provide said diaphragm with a negative operational impedance encountered by rear loading, a balance being provided between said positive and negative operational impedances, a lower frequency response being provided to said low-bass acoustic horn by said diaphragm of said woofer; and
a pair of tweeters disposed on said opposing curved walls of said mid-bass acoustic horn, which curved walls disperse high frequency waves from said tweeters.
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Abstract
A loudspeaker system has an elliptical stepped mid-range horn above and coplanar with a flared mid-bass horn having disposed therein a pair of tweeters on sidewalls thereof and a woofer in a backwall thereof. The back of the woofer communicates with a folded low frequency bass horn such that low frequency response is loaded from the rear of the diaphram for the woofer driver, thereby eliminating the necessity for further amplification and drivers to obtain fidelity in low frequency response. The low frequency bass section defines a convoluted path for the sound which comes from the interior structure of a folded horn thus creating an acoustical boost for low frequency sound.
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Citations
15 Claims
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1. A loudspeaker system comprising, in combination:
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a mid-range acoustic transformer including a flared, stepped elliptical horn with a mid-range driver therein; a woofer having a diaphragm; a mid-bass acoustic horn mounted below said mid-range acoustic transformer, said mid-range bass acoustic horn having said woofer with said diaphragm disposed on a rear wall thereof to provide said diaphragm with a positive operational impedance encountered by front loading, said mid-bass acoustic horn having at least two opposing curved walls; a low-bass acoustic horn positioned directly beneath said mid-bass acoustic horn and having a folded horn interior section which communicates with rear of said woofer to provide said diaphragm with a negative operational impedance encountered by rear loading, a balance being provided between said positive and negative operational impedances, a lower frequency response being provided to said low-bass acoustic horn by said diaphragm of said woofer; and a pair of tweeters disposed on said opposing curved walls of said mid-bass acoustic horn, which curved walls disperse high frequency waves from said tweeters. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A loudspeaker system in which a bass transformer approximates a folded low-bass horn, the system comprising, in combination:
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a woofer having a diaphragm; a mid-bass transformer including a mid bass horn having an open front and providing said diaphragm with a positive operational impedance encountered by front loading; an upper section of said folded low-bass horn communicating with rear of said woofer and providing said diaphragm with a negative operational impedence encountered by rear loading, a balance being provided between said positive and negative impedences, a lower frequency response being provided to said low-bass horn by said diaphragm of said woofer, said upper section having first and second acoustical portions through which low frequency sound waves generated by rear of said diaphragm in said woofer travel a convoluted path through said portions and are enhanced, said first acoustic portion being defined by baffle means depending from a wall of said upper section and defining dead air space between the rear of said woofer and said baffle means, whereby low frequency sound waves from said woofer excite the dead air space and are repercussed and boosted by said first acoustical portion and directed into said second acoustical portion; and a lower section of said folded low-bass horn joined to and communicating with said upper section and gradually expanding downwardly and forwardly therefrom, terminating in an acoustic mouth situated directly beneath and coplanar with said open front in said mid-bass acoustic horn. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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Specification