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In Reply to: RE: You've already done the best thing you could do, IMO, by actively biamping. :) posted by watts on December 28, 2022 at 11:39:17
The 0.82 and 0.27 mH need to have a low reistance (DCR) in order to not modify the frequency response. The 0.47 mH is less critical.
Magnepan seems to have chosen the third order low pass on the mid in order to reduce a peak higher up in the mid. The high pass on the ribbon tweeter is set rather low and streeses the ribbon a bit more than in some other models with the ribbon.
Follow Ups:
youre knowledge of crossovers is better than mine. I don't know anything about checking the resistance of inductors; I assumed just getting the correct Henry value was sufficient?So here is the specs of the inductors I put in:
0.43 ohms for .82 mH
0.22 ohms for .27mHThis is what Jeff at Sonic Craft suggested I get, I assume he knows what he is doing. Let me know if the values are fine, I do see they have lower resistance inductors available, but the prices get crazy for really low resistance .82 inductors.
I have no issues redoing some things if I don't like what I hear, gives me something to do before golf season starts :)
Edits: 12/29/22 12/29/22 12/29/22 12/29/22
I was just a bit surprised that your aircore coils looked so small compared to the ones Magnepan installed. That could mean yours are having a higher resistance. The series resistance reduce the output of the midrange. If you liked the tonal balance of the original crossover and now use coils with higher resistances, it may sound a bit different.
As Magnepan used an ironcored coil for the 0.82 mH-coil, I guess it has a low resistance, probably lower than your Solen coil. It is true tht aircored coils get expensive if you go for low resistance. That is also the reason to why Magnepan uses them frequently.
If you like the sound of your 3.6 the way they are now - do nothing.
If you wanted to closely match DCR values, is it as easy as measuring the factory coil resistance with a multimeter and buying new coils close to the measured resistance?
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