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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: Xo1 for tympani 4 posted by dnasty on January 19, 2015 at 15:33:19:
Capacitors only come in limited values. Typically you will only find E-12 values. You can look up the EIA system for passive components (resistors, capacitors and coils). Bottom line - you will not find 6 but can find 5.6 and 6.8. You can also wire two caps in parallel and the values are additive. For example 4.7 and 1.2 will get you 5.9 which is close enough for government work.
As to the calculation C= 1/(2*pi*f*Z) where Z is the input impedance of your amp. So for 400 Hz, 47Kohm, C= 1/(2*pi*400*47000) = 8465 pf. The closest you can get with a single cap is 8200 pf but if you want you could parallel a 4700 with a 3900 pf and get damn close. I have used RTE Rel-caps (2% tolerance) in this application. You can get them from PartsConnexion.
I will not get into a discussion here about using the XO-1 other than to say it's sort of half-ass but not a bad way to get into biamping.
"Our head is round in order to allow our thoughts to change direction." Francis Picabia
Edits: 01/19/15
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Follow Ups
- RE: Xo1 for tympani 4 - neolith 19:14:05 01/19/15 (3)
- RE: Xo1 for tympani 4 - dnasty 19:27:12 01/19/15 (2)
- RE: Xo1 for tympani 4 - Roger Gustavsson 01:01:19 01/20/15 (1)
- RE: Xo1 for tympani 4 - dnasty 15:52:59 01/20/15 (0)
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