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<blockquote data-quote="thch" data-source="post: 2446293" data-attributes="member: 562032">if placed in series with the coil, there would be an impedance minimum @ resonance, for lows, its probably going to be a large cap.&nbsp; and it may end up acting too much like a highpass.in parrallel.&nbsp; good luck with that.&nbsp; best not to have a device trying to force a voltage to a device that doesn&#039;t want to change voltage.&nbsp; its a good way to trip overcurrent protection or cause an amp to be generally unhappy.even if it worked, in a sealed box, all sound comes from the cone.&nbsp; to make it louder you&#039;d need to be able to move the cone more.&nbsp; a ported box @ resonance is already a low impedance point, with rises in impedance due to temperature, mechanical losses (reflected back through the speaker), and distributed effects.However, you might try some of this out.&nbsp; keep in mind that parallel connection of the cap might fry your amp.&nbsp; Le won&#039;t matter as Mms and Cms are energy storage devices connected to the moving motor and would appear to be an inductor and capacitor attached to the amp as well (see winISD&#039;s help file for the T/S models).&nbsp; Z(Mms) and Z(Cms) will both be more dominant then Z(Le).IIRC, Le was frequency dependent.&nbsp; in practical woofers it would be between 0.2 and 1 mH per Ohm (@ DC).maybe you could use this to move the resonance to a more favorable point.&nbsp; it may be worth trying out.</blockquote>

[QUOTE="thch, post: 2446293, member: 562032"] if placed in series with the coil, there would be an impedance minimum @ resonance, for lows, its probably going to be a large cap. and it may end up acting too much like a highpass. in parrallel. good luck with that. best not to have a device trying to force a voltage to a device that doesn't want to change voltage. its a good way to trip overcurrent protection or cause an amp to be generally unhappy. even if it worked, in a sealed box, all sound comes from the cone. to make it louder you'd need to be able to move the cone more. a ported box @ resonance is already a low impedance point, with rises in impedance due to temperature, mechanical losses (reflected back through the speaker), and distributed effects. However, you might try some of this out. keep in mind that parallel connection of the cap might fry your amp. Le won't matter as Mms and Cms are energy storage devices connected to the moving motor and would appear to be an inductor and capacitor attached to the amp as well (see winISD's help file for the T/S models). Z(Mms) and Z(Cms) will both be more dominant then Z(Le). IIRC, Le was frequency dependent. in practical woofers it would be between 0.2 and 1 mH per Ohm (@ DC). maybe you could use this to move the resonance to a more favorable point. it may be worth trying out. [/QUOTE]

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