Capacitor Question

swantzilla · 18th April 2011, 03:13 PM

I need a 210uf cap in my midrange crossover section. I know that a 150 and a 60 in parallel equals 210uf. How do audio frequencies react to parallel caps? Would there be a big difference if I went to one big cap compaired to the two smaller ones?

sofaspud · 18th April 2011, 03:48 PM

IMO no big difference.
How about a standard value 220uF that measures at the low side of its tolerance?

swantzilla · 18th April 2011, 06:40 PM

Quote:

Originally Posted by sofaspud

IMO no big difference.
How about a standard value 220uF that measures at the low side of its tolerance?

I am currently using a 150uf np and a 65uf np in parallel. I was just wondering if audio acted differently than RF.

Face · 18th April 2011, 11:33 PM

In my experience, splitting the values unevenly had a negative effect on imaging, YMMV.

DF96 · 19th April 2011, 10:04 AM

Yes, audio is usually simpler than RF. Problems are only likely to arise if the capacitors are very different in value and very low ESR; then you might get a resonance.

Given normal manufacturing tolerances, I would just use a 220uF - perhaps selected if you are really fussy.

18th April 2011, 03:13 PM	#1
swantzilla diyAudio Member Join Date: Apr 2011 Location: Tampabay	Capacitor Question I need a 210uf cap in my midrange crossover section. I know that a 150 and a 60 in parallel equals 210uf. How do audio frequencies react to parallel caps? Would there be a big difference if I went to one big cap compaired to the two smaller ones?

18th April 2011, 11:33 PM	#4
Face diyAudio Member Join Date: May 2007	In my experience, splitting the values unevenly had a negative effect on imaging, YMMV. __________________ "If it measures good and sounds bad, -- it is bad. If it sounds good and measures bad, -- you've measured the wrong thing." Daniel R. von Recklinghausen

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18th April 2011, 03:48 PM	#2
sofaspud diyAudio Member Join Date: Nov 2005 Location: San Antonio	IMO no big difference. How about a standard value 220uF that measures at the low side of its tolerance?

19th April 2011, 10:04 AM	#5
DF96 diyAudio Member Join Date: May 2007	Yes, audio is usually simpler than RF. Problems are only likely to arise if the capacitors are very different in value and very low ESR; then you might get a resonance. Given normal manufacturing tolerances, I would just use a 220uF - perhaps selected if you are really fussy.