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The system requires relatively flat impedance curves for the rear speakers to work properly, which was often the case in the tube-amplifier days. Tube amplifiers had a constant impedance over a wide range, and worked best with high-efficiency speakers. Later on, when transistor amplifiers were used, speakers tended to lose that design feature.
Products included "biflex" speakers (where frequency range was increased by a flexible "decoupling" of a small center area of the speaker's cone from a larger "woofer" area) and the 604-series of coaxial speakers (which employed a high-efficiency compression driver mounted to the rear of the 604's low-frequency magnet, and exited through a ...
The next innovation came from E. C. Wente and A. L. Thuras in "A High-Efficiency Receiver for a Horn-Type Loudspeaker of Large Power capacity" in the Bell System Technical Journal, 1928. [2] They devised a plug placed in front of a radiating diaphragm to control the transition from compression cavity to horn throat.
Crawford was a high-end audio dealer in Los Angeles at the time, and he felt that there was a viable market for a high-quality loudspeaker that was small enough to be used in home audio systems. The current two-way speakers with separate LF and HF drivers were too large for this application and Art suggested a coaxial design whereby a LF and HF ...
A tweeter or treble speaker is a special type of loudspeaker (usually dome, inverse dome or horn-type) that is designed to produce high audio frequencies, typically up to 100 kHz. The name is derived from the high pitched sounds made by some birds (tweets), especially in contrast to the low woofs made by many dogs , after which low-frequency ...
Paul Wilbur Klipsch (March 9, 1904 – May 5, 2002) was an American engineer and high fidelity audio pioneer, known for developing a high-efficiency folded horn loudspeaker. Unsatisfied with the sound quality of phonographs and early speaker systems, Klipsch used scientific principles to develop a corner horn speaker that sounded more lifelike ...