Driver’s Varying Impedance

As we all know, any driver is going to have varynig impedance depending on: driver, frequency, temperature, ect... Well, I plotted out the impedance of my sub for fun. Here it is



It's an Infinity Kappa Perfect 12.1D (wired for 2 ohms) in a 1.25 cubic ft sealed box. Now my question is, is there any way that I could tame that huge spike at ~44 Hz, or should I not even worry about it??

Paul

*edit* I noticed that the spike has a Q of about 1.

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Look at the JBL10GTI for a comparison, just for kicks.   37.5 ohms at 38 Hz, what a peak.   And you know it's a very good sub.

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Build the box so that it performs well in the worst case scenario and, in return, it will reward you at all times.

I guess this would be a graph of the frequency response.



So I'm wondering if the impedance of the sub were lowered to be level, then would the SPL at ~44Hz increase??

Paul

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Frequency response is the default graph:  "system overall-transfer function magnitude".  Check out the help file, and double-click  on "using WinISD Pro" to open "graph types explained"

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Build the box so that it performs well in the worst case scenario and, in return, it will reward you at all times.

Thanks man.

Paul

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The imedence curve you posted is normal.  The peak at 43Hz indicates the driver's resonant frequency.

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