Series filter (Visaton stella light) for open baffle? - diyAudio
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Old 18th May 2016, 06:02 PM   #1
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Default Series filter (Visaton stella light) for open baffle?

I'm about to make a crossover, and I saw the very elegant and not to mention cheap Visaton Stella Light crossover (made up of just two parts) for that particular FAST build. Is there any chance a build like that would work my speakers? I couldn't find too much theory or forum threads on these kind of filters, but I might be looking under the wrong terms.

My speakers as they stand are open baffle (Mark Audio CHR-70 third gen, metal, over Eminence Alpha 15a's). I know run both drivers full range like the peasant I am, and while they sound fun I have the idea I really need an XO

I'm sorry if it's a stupid Q, I only recently got in the hobby.

Click the image to open in full size.IMG_4861 by ctjr, on Flickr

Click the image to open in full size.Screen Shot 2016-05-18 at 19.03.35 by ctjr, on Flickr

Last edited by Lohengrimas; 18th May 2016 at 06:04 PM.
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Old 18th May 2016, 07:11 PM   #2
sreten is offline sreten  United Kingdom
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Hi,

It will certainly work better than no x/o.

Read :
http://www.quarter-wave.com/OBs/OB_Design_Part_1.pdf
http://www.quarter-wave.com/OBs/OB_Design_Part_2.pdf

rgds, sreten.
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Old 18th May 2016, 07:21 PM   #3
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Originally Posted by sreten View Post
Hi Sreten, thanks for your reply, I was about to build the Martin King-variant (my speakers are obviously build of his papers), but if I could save some money by going for a simpler filter... I might just go ahead and build a King one.
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Old 18th May 2016, 07:33 PM   #4
Sonce is offline Sonce  Macedonia
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Read carefully this:
http://www.quarter-wave.com/OBs/OB_Design_Part_1.pdf
http://www.quarter-wave.com/OBs/OB_Design_Part_2.pdf

Edit: Sreten was faster...
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Old 18th May 2016, 07:48 PM   #5
sreten is offline sreten  United Kingdom
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Quote:
Originally Posted by Lohengrimas View Post
Hi Sreten, thanks for your reply, I was about to build the Martin King-variant
(my speakers are obviously build of his papers), but if I could save some
money by going for a simpler filter... I might just go ahead and build a King one.
Hi,

You won't save any money long run using the wrong filters.

rgds, sreten.
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Old 18th May 2016, 08:50 PM   #6
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Originally Posted by sreten View Post
Hi,

You won't save any money long run using the wrong filters.

rgds, sreten.
Obviously; I do seem to have a hard time finding 30.0 mH coils though...
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Old 19th May 2016, 08:18 AM   #7
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Hi, thy handle tells me, that thou may understand German a bit, Lohengrimas. There is a software called Boxsim, which can do most domestic loudspeaker stuff virtually. (Only thing i miss, is two different drivers in the same enclosure.) I sooner not equalize the open baffle bass loss completely passively but stop at 10 mH or so, just enuff to pull down level of the Eminence to the one of the Mark Alpair, and do the rest, what is still needed, on the small signal side. I would also be on the Less Is More side and try to archieve flat phase response(, which Boxsim does not tell thee, it only tells single driver phase, but thou can deduce über-alles phase easily). Grasso
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Old 19th May 2016, 10:08 AM   #8
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Quote:
Originally Posted by Grasso789 View Post
Hi, thy handle tells me, that thou may understand German a bit, Lohengrimas. There is a software called Boxsim, which can do most domestic loudspeaker stuff virtually. (Only thing i miss, is two different drivers in the same enclosure.) I sooner not equalize the open baffle bass loss completely passively but stop at 10 mH or so, just enuff to pull down level of the Eminence to the one of the Mark Alpair, and do the rest, what is still needed, on the small signal side. I would also be on the Less Is More side and try to archieve flat phase response(, which Boxsim does not tell thee, it only tells single driver phase, but thou can deduce über-alles phase easily). Grasso
yes, thanks, I'll try Boxsim, and thanks for the guidance!
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Old 22nd May 2016, 12:57 AM   #9
sreten is offline sreten  United Kingdom
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Quote:
Originally Posted by Lohengrimas View Post
Obviously; I do seem to have a hard time finding 30.0 mH coils though...
Hi, where do 30mH coils come into it ? rgds, sreten.
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