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dB calculations
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<blockquote data-quote="Mark DeArman" data-source="post: 137972" data-attributes="member: 950"><p>Re: dB calculations</p><p></p><p></p><p></p><p>Yeah 'many' was probably an overly optimistic word. How about 'a few', I was meaning some less than the 75% number.</p><p></p><p>Of course the reference level is another whole argument. For instance, I get where the AES was going when the wrote the new AES2 standard. Although 99.9% of amplifiers are close to c.v. I don't like the, "let's fix it at 2.83Vs".</p><p></p><p>Personally I like to publish the Impedance vs. Frequency plot, choose a actual impedance mid-band for the speaker (not on a resonance if present, come on people!!!), calculate the 1W drive level, and then produce the Sensitivity vs Frequency plot at 1m. For subs I like to do it ground plane, so the customer can actually verify the specs.</p></blockquote><p></p>
[QUOTE="Mark DeArman, post: 137972, member: 950"] Re: dB calculations Yeah 'many' was probably an overly optimistic word. How about 'a few', I was meaning some less than the 75% number. Of course the reference level is another whole argument. For instance, I get where the AES was going when the wrote the new AES2 standard. Although 99.9% of amplifiers are close to c.v. I don't like the, "let's fix it at 2.83Vs". Personally I like to publish the Impedance vs. Frequency plot, choose a actual impedance mid-band for the speaker (not on a resonance if present, come on people!!!), calculate the 1W drive level, and then produce the Sensitivity vs Frequency plot at 1m. For subs I like to do it ground plane, so the customer can actually verify the specs. [/QUOTE]
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