07-13-2010, 06:19 AM
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CC Member
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Join Date: Feb 2006
Location: Scottsdale,
AZ
Cobra Make, Engine: Superformance, Roush 427R-095, Pro Systems carb, 2" headers, Buckshot Racefab side pipes, 10s off idle start
Posts: 705
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http://www.sengpielaudio.com/calculator-levelchange.htm  
I guess I was wrong. I was thinking in speakers and electronics. Twice the watts will make your speakers 3 db louder. It looks like if +/- 3 db it is double or half the energy.
http://ntrack.com/wiki/index.php/How_LOUD_will_it_be%3F
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