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<blockquote data-quote="Tim McCulloch" data-source="post: 137834" data-attributes="member: 67"><p>Re: dB calculations</p><p></p><p></p><p></p><p>I'm saying that OSHA is right, and so is Ivan because they're talking about different things. OSHA is showing the addition of uncorrelated noise, where changing the WAY the noise is created has no impact on how much noise there is... it's simple addition of single factors.</p><p></p><p>In combining subs, you have 2 factors - additional radiator area and doubling of the available current (if you don't run the subs in parallel). Now the kicker - the additional current doesn't really make a difference until you run out the initial current. That's why I referred to it as headroom.</p><p></p><p>The 10 and 20 base logs are used because power and voltage do not have the same logarithmic curve.</p></blockquote><p></p>
[QUOTE="Tim McCulloch, post: 137834, member: 67"] Re: dB calculations I'm saying that OSHA is right, and so is Ivan because they're talking about different things. OSHA is showing the addition of uncorrelated noise, where changing the WAY the noise is created has no impact on how much noise there is... it's simple addition of single factors. In combining subs, you have 2 factors - additional radiator area and doubling of the available current (if you don't run the subs in parallel). Now the kicker - the additional current doesn't really make a difference until you run out the initial current. That's why I referred to it as headroom. The 10 and 20 base logs are used because power and voltage do not have the same logarithmic curve. [/QUOTE]
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