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Old 11th May 2004, 07:50 PM   #1
Zen-est is offline Zen-est  Estonia
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Default visaton BG20 freq. response

hello to you all.
i've just finished some fullrange speakers. you can see them from the system description thread. but i have a small problem. the visaton BG20 loudspeaker has a significant bump in the freq. response graph. with slower and calmer music you barely notice it but with faster and more agressive rock, like AC/DC the upper part of the electric guitar solos can get very sharp. the most worrying place is from 3-5khz. i would like to flatten that area a little bit. i've heard, that dammar could be a helpful thing. has anyone got anykind of experience with that stuff? how does it effect the overall sound, freq. response and sentsitivity. any comments would be welcome another possiblility could be a notch-filter. but that filter stuff is not my piece of pie. first i haven't got any idea how to calculate a notch-filter, and second i planned to keep the speakers as filterfree as possible. but still, all suggestions are very welcome

regards, Toomas
Estonia.
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Old 12th September 2006, 12:57 PM   #2
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Hi

Could you give more details about the speakers? (closed, br, volume ...) A building plan would be nice.

Cristi
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Old 12th September 2006, 10:02 PM   #3
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Cristi,
Do a search, there are a couple of threads about this speaker.
IIRC, it looks like it would make a good OB driver,
But it has a whizzer cone which needs taming.
There's a tweak called (I think) ' the 99c mod' which is putting some damping material around the base of the whizzer.
Otherwise, a notch filter may be required.

Pete McK
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Old 17th May 2012, 07:41 PM   #4
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Quote:
Originally Posted by PeteMcK View Post
Cristi,
Do a search, there are a couple of threads about this speaker.
IIRC, it looks like it would make a good OB driver,
But it has a whizzer cone which needs taming.
There's a tweak called (I think) ' the 99c mod' which is putting some damping material around the base of the whizzer.
Otherwise, a notch filter may be required.

Pete McK
Can somebody tell me about the "mod"?

Thanks!
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