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Planar Speaker Asylum Welcome! Need support, you got it. Or share your ideas and experiences. |
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In Reply to: Effect of Shunt? posted by dmccoach on September 28, 2012 at 11:34:30:
Changing the woofer inductor from 2.2 mH to 2.5 mH lowers the fc from 289 hz to 255 hz resulting in a change in the xo frequency from 911 hz to 924 hz.
Adding a 50 mfd shunt cap, changes the fc to 480 hz and the xo point to 884. The big shift in the fc is "balanced" by the steeper slope so the xo is only affected a small amount (40 hz).
Changing the inductor to 2.5 mH and adding the 50 mfd cap, gets you an fc of 450 and a xo point of 833. There is a slight increase in the dip seen around the xo point.
If you then change the hp cap from 12 to 28 mfd, the result is a fc for the tweeter of 1421 hz v. 3316 before and the xo drops to 609 hz. The output curve is almost flat whereas the original crossover has a ~6db drop around the xo. This will give you an augmented midrange.
I did this in about 5 minutes using my spreadsheet. Email me for specific instructions on its use.
"Our head is round in order to allow our thoughts to change direction." Francis Picabia
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Follow Ups
- RE: Effect of Shunt? - neolith 12:25:35 09/28/12 (6)
- One more thing - neolith 14:02:20 09/28/12 (5)
- One shared by quite a few of us, methinks. /nt\ - Opus 104 15:46:38 09/28/12 (4)
- RE: One shared by quite a few of us, methinks. /nt\ - dmccoach 19:24:44 09/28/12 (3)
- It's very good!! :-)) nt - andyr 23:18:47 09/28/12 (2)
- RE: It's very good!! :-)) nt - neolith 05:46:48 09/29/12 (1)
- RE: It's very good!! :-)) nt - dmccoach 06:07:44 09/29/12 (0)
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