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<blockquote data-quote="thadman" data-source="post: 2372368" data-attributes="member: 561122">I&#039;ve seen several implementations of servo-drive technology (theres an article outlining it in this months Audio XPress) in subwoofers, but not midranges where we are most sensitive to distortion.After reading up on diyaudio.com, I&#039;ve come to the conclusion that most distortion from a driver is due to non-linearities in excursion (BL isnt flat).From my understanding, the servo-drive units (measuring acceleration) apply different amounts of power throughout the stroke making its excursion more linear. Why hasnt this been done for midranges?Is the active technology inept at responding fast enough in the midrange?Would it be possible to create a *passive circuit* after measuring a driver (doesnt dayton offer a speaker measurement setup?) and its specific BL curve and applying power at the inverse of the curve (more power at the extremes) to make the BL more flat?TC Sounds has introduced a *passive* answer to this solution by designing the voice coil around the BL curve (varied amount of windings)...why hasnt this been done on midranges?</blockquote>

[QUOTE="thadman, post: 2372368, member: 561122"] I've seen several implementations of servo-drive technology (theres an article outlining it in this months Audio XPress) in subwoofers, but not midranges where we are most sensitive to distortion. After reading up on diyaudio.com, I've come to the conclusion that most distortion from a driver is due to non-linearities in excursion (BL isnt flat). From my understanding, the servo-drive units (measuring acceleration) apply different amounts of power throughout the stroke making its excursion more linear. Why hasnt this been done for midranges? Is the active technology inept at responding fast enough in the midrange? Would it be possible to create a *passive circuit* after measuring a driver (doesnt dayton offer a speaker measurement setup?) and its specific BL curve and applying power at the inverse of the curve (more power at the extremes) to make the BL more flat? TC Sounds has introduced a *passive* answer to this solution by designing the voice coil around the BL curve (varied amount of windings)...why hasnt this been done on midranges? [/QUOTE]

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