Electronically Adjustable Passive Radiator?

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Not sure if there is any value to doing it, but curious if anyone has ever tried it. I have searched many different ways, but am overrun by straight PR designs.

If one were to use a larger diameter speaker as a PR, they could vary the resistance to the signal generated by it's voice coil. This could be done with a fixed resistance or with a bandpass x-over to only work over a specific portion of the output.

Could this be used to make a PR enclosure sound more like a sealed?
 
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