Journal of the Society of Motion Picture Engineers ( Volume: 43, Issue: 3, September 1944)

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The Duplex Loudspeaker

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Publisher: SMPTE
Doc Type: Journal Article
Article Type: research-article
Abstract: The Duplex Loudspeaker is a combined two-way loudspeaker mounted in an integral unit so that the high-frequency energy is radiated from a small multicellular horn mounted on the face of the low-frequency diaphragm. Separate permanent magnets of improved magnetic material are now used for the fields of each voice coil. The crossover has been selected at 1200 cycles so that the high-frequency horn can be placed in the center of the low-frequency diaphragm. A signal input up to 25 w can safely be applied to the speaker. The intermodulation products are very low as a result of the two-way principle. The configuration of the high-frequency horn produces an angle of radiation which is 60 degrees in the horizontal plane and 40 degrees in the vertical plane. Due to the type of construction a high degree of uniformity between units can be maintained in manufacture. The unit is capable of efficient radiation beyond 15,000 cycles.
Publication Date: 1944-09-01
DOI: 10.5594/J08000
Link: https://doi.org/10.5594/J08000
Author(s): James B. Lansing

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James B. Lansing; The Duplex Loudspeaker, Journal of the Society of Motion Picture Engineers ( Volume: 43, Issue: 3, September 1944); SMPTE, 1944. Available at https://doi.org/10.5594/J08000

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James B. Lansing; The Duplex Loudspeaker, Journal of the Society of Motion Picture Engineers ( Volume: 43, Issue: 3, September 1944); SMPTE, 1944. Available at https://doi.org/10.5594/J08000

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James B. Lansing; The Duplex Loudspeaker, Journal of the Society of Motion Picture Engineers ( Volume: 43, Issue: 3, September 1944); SMPTE, 1944. Available at https://doi.org/10.5594/J08000

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<span class="citation">James B. Lansing; <cite>The Duplex Loudspeaker</cite>, Journal of the Society of Motion Picture Engineers ( Volume: 43, Issue: 3, September 1944); SMPTE, 1944. Available at <a href="https://doi.org/10.5594/J08000" target="_blank" rel="noopener">https://doi.org/10.5594/J08000</a></span>

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James B. Lansing; The Duplex Loudspeaker, Journal of the Society of Motion Picture Engineers ( Volume: 43, Issue: 3, September 1944); SMPTE, 1944
doi: 10.5594/J08000
url: https://doi.org/10.5594/J08000

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James B. Lansing; <cite id="bib-10-5594-j08000">The Duplex Loudspeaker</cite>, Journal of the Society of Motion Picture Engineers ( Volume: 43, Issue: 3, September 1944); SMPTE, 1944
<span class="doi">10.5594/J08000</span>
</li>