Half Chang mids to high please help - diyAudio
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Old 22nd February 2009, 10:12 PM   #1
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Default Half Chang mids to high please help

i just built my first set of speakers the half changs i have them hooked up to my turn table thru the bugle pre amp then thru a gain clone amp i built the speakers sound good but the mids and highs sound to strong to me is there any thing i can do to help lower the mids i have dampened the back and one side of the box any other ideas would be great

link to pics of my half changs

http://www.flickr.com/photos/35669902@N06/
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Old 22nd February 2009, 10:47 PM   #2
MJK is offline MJK  United States
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The speakers look great.

I think that a baffle step correction (commonly abbreviated BSC) filter will solve your problem. You probably need 3 to 4 dB of attenuation. There is an Excel based calculator on my site, under the General Speaker Related Articles link, that will help you size the components.
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Old 22nd February 2009, 10:58 PM   #3
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thanks for the help but is there any thing else i can do to the speakers first before i go this rought
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Old 22nd February 2009, 11:12 PM   #4
MJK is offline MJK  United States
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I doubt it. The problem you describe is a classic baffle step response. The most effective way to cure it is with a filter. Try it, it is adjustable and you can easily remove it if you are not satisfied.
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Old 23rd February 2009, 03:46 PM   #5
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If you can find Paul Joppa's article on line level BSC, you'll certainly save yourself a little money and efficiency.

I can't seem to find it though. I know he mentions it on the bottlehead site though.

edit: ESP also has a line level BSC. Don't know how well it works though.
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Old 25th February 2009, 12:48 AM   #6
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i found the articale thanks for all the help i orderd the parts from madisound i will start tweaking this weakend thanks again for all the help
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