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<blockquote data-quote="thch" data-source="post: 3513121" data-attributes="member: 562032">dd, you make very technical posts.&nbsp; Unfortunantly you spend a lot of time on small details and miss key concepts.do not be discouraged by the following, but try to take in some of it and think about how simple things can be expressed by technicalities, and not the converse (how technicalities can describe simple things) :1.)&nbsp; capacititance is shown in the plot, but not where you say -- notice impedance phase is positive below 30hz!2.)&nbsp; EMF is the long road to the answer.&nbsp; the short road is &quot;transducer&quot;.&nbsp; a transducer converts electrical energy into mechanical energy and vice versa.3.)&nbsp; resistance represents &quot;used&quot; energy, and things&nbsp; that use energy.4.)&nbsp; reactance (inductance, capacitance) represent things that can store and release energy.5.)&nbsp; From 3 and 4, it seems that mass and springiness can take energy from the electical system (when the cone is forced to move) and return it later.&nbsp; Mass pulls the coil through the gap, and sprininess pushes it back.&nbsp; these are opposite, just like inductance and capacitance.6.)&nbsp; air also has mass and compliance -- and as such can affect the mechanical system that is the cone, which in turn affects the electrical system.7.)&nbsp; impedance is maximized (in free air) at Fs.&nbsp; The impedance is based upon the coupling across the gap (BL), as well as Fs, Mms, and/or Cms (as knowing 2 gives you the other).8.)&nbsp; increasing Kms without increaseing Fs (eg, increasing Kms and Mms) will cause the impedance peak to rise.9.)&nbsp; The bandwidth of the peak will give you Qms (for free air)10.)&nbsp; a box will change Cms (by an amount given by Vas and Vb), and thus changes Fs, and Qms, and Qes, and thus Qts.edit -- and at resonance, inductance (mass) and capacitance (springiness or opposite of compliance) is balenced.&nbsp; it can be seen as the mass (inductance) transfering all of its energy to the spring (capacitance) each cycle, and losing an amount given by the resistance on each cycle -- the amp must/can only provide only an amount of power equal to this loss on each cycle.&nbsp; this resistance is made up of various things, such as mechanical losses, and acoustic energy that is abosorbed.</blockquote>

[QUOTE="thch, post: 3513121, member: 562032"] dd, you make very technical posts. Unfortunantly you spend a lot of time on small details and miss key concepts. do not be discouraged by the following, but try to take in some of it and think about how simple things can be expressed by technicalities, and not the converse (how technicalities can describe simple things) : 1.) capacititance is shown in the plot, but not where you say -- notice impedance phase is positive below 30hz! 2.) EMF is the long road to the answer. the short road is "transducer". a transducer converts electrical energy into mechanical energy and vice versa. 3.) resistance represents "used" energy, and things that use energy. 4.) reactance (inductance, capacitance) represent things that can store and release energy. 5.) From 3 and 4, it seems that mass and springiness can take energy from the electical system (when the cone is forced to move) and return it later. Mass pulls the coil through the gap, and sprininess pushes it back. these are opposite, just like inductance and capacitance. 6.) air also has mass and compliance -- and as such can affect the mechanical system that is the cone, which in turn affects the electrical system. 7.) impedance is maximized (in free air) at Fs. The impedance is based upon the coupling across the gap (BL), as well as Fs, Mms, and/or Cms (as knowing 2 gives you the other). 8.) increasing Kms without increaseing Fs (eg, increasing Kms and Mms) will cause the impedance peak to rise. 9.) The bandwidth of the peak will give you Qms (for free air) 10.) a box will change Cms (by an amount given by Vas and Vb), and thus changes Fs, and Qms, and Qes, and thus Qts. edit -- and at resonance, inductance (mass) and capacitance (springiness or opposite of compliance) is balenced. it can be seen as the mass (inductance) transfering all of its energy to the spring (capacitance) each cycle, and losing an amount given by the resistance on each cycle -- the amp must/can only provide only an amount of power equal to this loss on each cycle. this resistance is made up of various things, such as mechanical losses, and acoustic energy that is abosorbed. [/QUOTE]

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