Great, I look forward to trying it... (BD-Design)

by Bert , Tuesday, February 12, 2008, 22:18 (5917 days ago) @ Cappy

Hi Cappy,

What do you mean by a bipolar 100uF cap? Electrolytic so as to be
cheaper?

Yes but also having some internal damping lowering the Q. You can try a film type later and see if you like it better though...

Also, I wonder how using a few 47 uF film caps doubled up would work?

Yes, that is close enough to try.

Regarding the inductor -- you show <0.5 for the DCR. Is lower better? I
see a Solen 3.6 mH 12g with a DCR of 0.47. Northcreek can wind a 0.33 ohm
one but it would be more expensive.

Higher than 0,5 ohm will hold back the bass but the 0,47ohm will do for now. You can always try other things later to see if it brings improvement as changing the DC resistance changes the Q of the filter at the same time...

Also, for my current bass filter I am using an air coil inductor. These
work well for midrange and treble, but I think it is holding my bass back
a bit. The next one I get won't be air coil.

I don't think it is because of the air, perhaps the resistance was a bit too high and/or the value was doing the wrong things.

Bert

--
BD-Design - Only the Best!

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