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RE: Neolith has posted Excel Spread Sheet for magnepan speakers

Did they write the value of the inductor on the bobbin?

The cap was obviously intended for a 4.8 ohm tweeter to produce a 1khz high pass. so I suspect they rebuilt it with a QR wire. You will need to double up the capacitor to 70uF to get to 1.1 khz.

You can measure the bass freq response to determine if it rolls off around 1-1.1 khz as in the original or at 2.2 khz to match the current high pass capacitor.

Alternately you can just go active now rather than when you get your supertweeter project done.
Just be sure your amp can handle the 2 ohm tweeter load. Many can't and many that can will not survive long doing so.

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