Bypassing capacitors

davidlzimmer · 6th June 2006, 02:04 PM

I have searched but just couldn't find the info I need.

Can some one explain the art of bypassing capacitors in a crossover.

A link to a tutorial would be nice.

Thanks!

GM · 6th June 2006, 02:26 PM

Greets!

No link or time for a tutorial, but 'in a nutshell', a capacitor has inductance and resistance, so when highpassing a wide BW you can shape its response by paralleling different values.

GM

RJ · 6th June 2006, 03:29 PM

Hi Dave,
Rudy J. here...
Here's some very good links;
http://www.northcreekmusic.com/Bypassing.html
http://www.htguide.com/forum/showthread.php4?t=20346
http://www.humblehomemadehifi.com/Cap.html
RAW Acoustics version using Sonicaps;

http://www.soniccraft.com/sonicap_platinum.htm
http://www.e-speakers.com/catalog/cl...ge_4272430.htm

auplater · 6th June 2006, 05:03 PM

Some of those links are little more than advertisements disguised as "technical" papers. At least ThomasW on HTforum states a rational approach... minimize costs and esr for a given capacitance... that makes sense.

If you'd like to send me LOTS of money, I can prolly scare up some mellifluent hyperbolic bloviation to improve the sonic character you perceive when listening and building your speakers.

otherwise, find some decent poly caps (avoid electrolytics) and build up a parallel stack to your desired value, and enjoy the change you put back in your pocket by avoiding $$$$ "boutique" capacitors.

auplater

davidlzimmer · 6th June 2006, 05:07 PM

Ok guys thanks!

Is the general idea to parallel small (less expensive) to total up to a larger (more expensive) and get the same value with less resistance?

Is the idea more to save money or to get less resistance or what?

davidlzimmer · 6th June 2006, 05:09 PM

bloviation!!!!

On this forum? Never!!!!!!! '

'

poobah · 6th June 2006, 05:11 PM

Quote:

Is the idea more to save money or to get less resistance or what?

Yes!

davidlzimmer · 6th June 2006, 05:25 PM

When the Poobah says yes, I guess I've got it!

Thanks all.

Rudy, I guess you know what project I'm working on!

poobah · 6th June 2006, 05:30 PM

Simmer down!

Actually Dave, it is a pretty big topic. When you actually get to a design, post, and people will help.

You do need to spend some money on big caps sometimes... but that is because they are big... you can safely stay away from the fancy stuff until you (or anyone else for that matter) actually know better.

davidlzimmer · 6th June 2006, 05:42 PM

Is it an unwritten law to stay away from non-polarized electrolytics,
or can they be used with a quality bypass?

6th June 2006, 02:04 PM	#1
davidlzimmer diyAudio Member Join Date: Jan 2006 Location: Fairmount, GA	Bypassing capacitors I have searched but just couldn't find the info I need. Can some one explain the art of bypassing capacitors in a crossover. A link to a tutorial would be nice. Thanks! __________________ Poor stereo mix? Switch to mono! Perfect.

6th June 2006, 02:26 PM	#2
GM diyAudio Member Join Date: Jun 2003 Location: Chamblee, Ga.	Greets! No link or time for a tutorial, but 'in a nutshell', a capacitor has inductance and resistance, so when highpassing a wide BW you can shape its response by paralleling different values. GM __________________ Loud is Beautiful if it's Clean! As always though, the usual disclaimers apply to this post's contents.

6th June 2006, 05:03 PM	#4
auplater diyAudio Member Join Date: Apr 2005 Location: KyOhWVa tristate	Links Some of those links are little more than advertisements disguised as "technical" papers. At least ThomasW on HTforum states a rational approach... minimize costs and esr for a given capacitance... that makes sense. If you'd like to send me LOTS of money, I can prolly scare up some mellifluent hyperbolic bloviation to improve the sonic character you perceive when listening and building your speakers. otherwise, find some decent poly caps (avoid electrolytics) and build up a parallel stack to your desired value, and enjoy the change you put back in your pocket by avoiding $$$$ "boutique" capacitors. auplater

6th June 2006, 05:07 PM	#5
davidlzimmer diyAudio Member Join Date: Jan 2006 Location: Fairmount, GA	Ok guys thanks! Is the general idea to parallel small (less expensive) to total up to a larger (more expensive) and get the same value with less resistance? Is the idea more to save money or to get less resistance or what? __________________ Poor stereo mix? Switch to mono! Perfect.

6th June 2006, 05:09 PM	#6
davidlzimmer diyAudio Member Join Date: Jan 2006 Location: Fairmount, GA	bloviation!!!! On this forum? Never!!!!!!! '' __________________ Poor stereo mix? Switch to mono! Perfect.


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6th June 2006, 03:29 PM	#3
RJ diyAudio Member Join Date: Oct 2004	Hi Dave, Rudy J. here... Here's some very good links; http://www.northcreekmusic.com/Bypassing.html http://www.htguide.com/forum/showthread.php4?t=20346 http://www.humblehomemadehifi.com/Cap.html RAW Acoustics version using Sonicaps; http://www.soniccraft.com/sonicap_platinum.htm http://www.e-speakers.com/catalog/cl...ge_4272430.htm

6th June 2006, 05:25 PM	#8
davidlzimmer diyAudio Member Join Date: Jan 2006 Location: Fairmount, GA	When the Poobah says yes, I guess I've got it! Thanks all. Rudy, I guess you know what project I'm working on! __________________ Poor stereo mix? Switch to mono! Perfect.

6th June 2006, 05:30 PM	#9
poobah diyAudio Member Join Date: Nov 2005	Simmer down! Actually Dave, it is a pretty big topic. When you actually get to a design, post, and people will help. You do need to spend some money on big caps sometimes... but that is because they are big... you can safely stay away from the fancy stuff until you (or anyone else for that matter) actually know better.

6th June 2006, 05:42 PM	#10
davidlzimmer diyAudio Member Join Date: Jan 2006 Location: Fairmount, GA	Is it an unwritten law to stay away from non-polarized electrolytics, or can they be used with a quality bypass? __________________ Poor stereo mix? Switch to mono! Perfect.

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