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Speaker Asylum General speaker questions for audio and home theater. |
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Speaker Asylum General speaker questions for audio and home theater. |
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In Reply to: RE: The Devore OrangutanHi posted by hahax@verizon.net on October 3, 2014 at 20:49:58:
Yes, intermodulation distortion is the same as frequency modulation distortion. Another name is Doppler distortion.
I met Paul Klipsch in Kaiserslautern, Germany not too long after he installed an anechoic chamber at his speaker factory. I asked him what he thought of Bose speakers and he got very excited because he had just measured them. He grabbed his binder of test reports and showed me the test results of the Bose 901 speaker, which he said was the only speaker he had tested that could produce over 100% intermodulation distortion. He measured a 10-kHz tone modulated by a 100-Hz tone with just the right amplitude but still within the speaker's power handling capability that produced 125% intermodulation distortion. He loved to show people those test results.
That level of intermodulation is not possible with ordinary speakers that contain both woofers and tweeters. The Bose 901 used nine 4-inch drivers to reproduce the entire frequency spectrum. In fact, each of the nine drivers was designed to handle all audio frequencies equally so that a long excursion 100-Hz test tone could easily modulate a low volume 10-KHz test tone to the point of producing 125% intermodulation distortion.
Best regards,
John Elison
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Follow Ups
- RE: The Devore OrangutanHi - John Elison 21:17:43 10/03/14 (1)
- RE: The Devore OrangutanHi - hahax@verizon.net 13:32:59 10/04/14 (0)
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