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Car Audio Discussion
General Car Audio
The Difference?
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<blockquote data-quote="Lasherž" data-source="post: 8709095" data-attributes="member: 679555"><p>You can't really compare two hypothetical speakers without mentioning all of the stats about them. Two 10" speakers have 78.5^2in x2 (~157.1^2in) of surface area and one 15" has 176.71^2in. Knowing nothing more about the setup, all else being equal the 15 moves more air with each stroke, so the 10's would need more excursion to make up for it. The power is a factor, but it's no more of a factor than the weight of the moving assembly, type of enclosure, etc. Without everything we can't really say which is more efficient at moving air, so we basically just conclude it's probably the 15" because they tend to be better at converting power into sound waves. Somewhat because the % of the usable cone area goes up on larger speakers, making my values a little off skewed to make the difference bigger.</p><p></p><p>Two 10" speakers which share the same sensitivity as a larger 15" and have larger excursion with the same power is a lot closer. But presumably you're talking about speakers within the same series, and within the same series larger speakers (always?) have higher sensitivity than smaller speakers using the same drivers.</p></blockquote><p></p>
[QUOTE="Lasherž, post: 8709095, member: 679555"] You can't really compare two hypothetical speakers without mentioning all of the stats about them. Two 10" speakers have 78.5^2in x2 (~157.1^2in) of surface area and one 15" has 176.71^2in. Knowing nothing more about the setup, all else being equal the 15 moves more air with each stroke, so the 10's would need more excursion to make up for it. The power is a factor, but it's no more of a factor than the weight of the moving assembly, type of enclosure, etc. Without everything we can't really say which is more efficient at moving air, so we basically just conclude it's probably the 15" because they tend to be better at converting power into sound waves. Somewhat because the % of the usable cone area goes up on larger speakers, making my values a little off skewed to make the difference bigger. Two 10" speakers which share the same sensitivity as a larger 15" and have larger excursion with the same power is a lot closer. But presumably you're talking about speakers within the same series, and within the same series larger speakers (always?) have higher sensitivity than smaller speakers using the same drivers. [/QUOTE]
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