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High Frequency Compression Driver Evaluation
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<blockquote data-quote="Art Welter" data-source="post: 148109" data-attributes="member: 52"><p>Re: High Frequency Compression Driver Evaluation</p><p></p><p></p><p>2/18/16 Revision: I noticed when comparing drivers tested recently to these tests that upper intermodulation distortion (the addition of two fundamental frequencies, 523 + 932 creating a third frequency of 1455, etc.) had been mistaken for ordinary order upper harmonics, resulting in (consistently) under reporting distortion %. Testing a 3.5" Tymphony TC9FD-18-08 "full range" driver on the Maltese horn, found that it had far less IM distortion than the best of the compression drivers, though is not capable of quite as much high frequency output due to less power handling and lower sensitivity.</p></blockquote><p></p>
[QUOTE="Art Welter, post: 148109, member: 52"] Re: High Frequency Compression Driver Evaluation 2/18/16 Revision: I noticed when comparing drivers tested recently to these tests that upper intermodulation distortion (the addition of two fundamental frequencies, 523 + 932 creating a third frequency of 1455, etc.) had been mistaken for ordinary order upper harmonics, resulting in (consistently) under reporting distortion %. Testing a 3.5" Tymphony TC9FD-18-08 "full range" driver on the Maltese horn, found that it had far less IM distortion than the best of the compression drivers, though is not capable of quite as much high frequency output due to less power handling and lower sensitivity. [/QUOTE]
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