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Subwoofers
Break in period for subs
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<blockquote data-quote="Buck" data-source="post: 8754304" data-attributes="member: 591582"><p>Here's a really good statement about Cms of woofers. I don't know how many people understand Cms, but I calculate Cms based off other t/s parameters, and that's part of the t/s calculations I do for what box size I want to give a woofer. Cms is how much the cone travels under a force. The stiffer the woofer, the less it will travel under power. This is one of the main factors in determining woofer stiffness, and the needed box size resulting from that stiffness.</p><p></p><p>Many woofers with a low Cms also have low Q values overall, especially low Qms values. Woofers with low Q values control themselves better or frankly are typically more stiff, but it depends on the suspension type, whether it's a progressive or linear suspension, or a mix of both. Progressive suspension woofers t/s are harder to read, because the stiffness of the woofer changes as the cone travels more, so you can get a low Fs and still have a low Qms and relatively low Cms.</p><p></p><p>"DD Audio subwoofers tend to be low compliance drivers. This means that our suspension tends to be pretty tight. Why would we do this, you might ask? It’s simple really, DD Audio customers demand the most from their woofers. Many people see something like a <a href="https://ddaudio.com/products/subwoofers/power-tuned/dd9500-2/" target="_blank">9500 series woofer</a> that is built to handle 2000 watts of continuous program power and think, “Gee maybe I should run that 3800 watt <a href="https://ddaudio.com/products/amplifiers/m-series/m3c/" target="_blank">M3c amplifier</a> on it.” Is it too much power? Potentially, but it certainly doesn’t stop people. To combat this DD makes the suspension strong enough to mechanically handle that kind of power."</p><p></p><p>[URL unfurl="true"]https://ddaudio.com/tech-talk-why-breaking-in-your-woofer-is-important/[/URL]</p></blockquote><p></p>
[QUOTE="Buck, post: 8754304, member: 591582"] Here's a really good statement about Cms of woofers. I don't know how many people understand Cms, but I calculate Cms based off other t/s parameters, and that's part of the t/s calculations I do for what box size I want to give a woofer. Cms is how much the cone travels under a force. The stiffer the woofer, the less it will travel under power. This is one of the main factors in determining woofer stiffness, and the needed box size resulting from that stiffness. Many woofers with a low Cms also have low Q values overall, especially low Qms values. Woofers with low Q values control themselves better or frankly are typically more stiff, but it depends on the suspension type, whether it's a progressive or linear suspension, or a mix of both. Progressive suspension woofers t/s are harder to read, because the stiffness of the woofer changes as the cone travels more, so you can get a low Fs and still have a low Qms and relatively low Cms. "DD Audio subwoofers tend to be low compliance drivers. This means that our suspension tends to be pretty tight. Why would we do this, you might ask? It’s simple really, DD Audio customers demand the most from their woofers. Many people see something like a [URL='https://ddaudio.com/products/subwoofers/power-tuned/dd9500-2/']9500 series woofer[/URL] that is built to handle 2000 watts of continuous program power and think, “Gee maybe I should run that 3800 watt [URL='https://ddaudio.com/products/amplifiers/m-series/m3c/']M3c amplifier[/URL] on it.” Is it too much power? Potentially, but it certainly doesn’t stop people. To combat this DD makes the suspension strong enough to mechanically handle that kind of power." [URL unfurl="true"]https://ddaudio.com/tech-talk-why-breaking-in-your-woofer-is-important/[/URL] [/QUOTE]
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