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Old 14th June 2006, 12:15 PM   #1
Progg70 is offline Progg70  Sweden
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Default Reduce 55Hz with a active filter

Hi!
I have a big resonance in my listening room for 55HZ. I would experiment with an active filter in the signal way, between (preamp and power amp) that reduces that frequency.
Please can some one give me a schematic for a filter with an OP in it.

Regard
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Old 14th June 2006, 05:07 PM   #2
sreten is offline sreten  United Kingdom
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http://www.linkwitzlab.com/filters.htm#7

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Old 16th June 2006, 10:32 AM   #3
Progg70 is offline Progg70  Sweden
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Yea!
Itís seems to be exactly what Iím looking for.
Thanks
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