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<blockquote data-quote="ciaonzo" data-source="post: 6533682" data-attributes="member: 607015">If you&#039;re looking for a driver that is specifically designed to be used in small sealed enclosures, this will help you. Shoot for a low Fs, generous Xmax, a Qts of .5 and higher, and a small Vas figure. Once you find drivers that fit into that criteria, you can double check it&#039;s suitability with this formula to find EBP (Efficiency Bandwidth Product). Fs/Qes = EBP. You want an EBP of around 65 or lower. 50 or less will be optimal.You can find the proper enclosure volume (in liters) to achieve a particular Qtc using this formula. Vb = Vas / (( Qtc / Qts ) ² - 1). There&#039;s about 28.3 liters in a cubic foot. To give you an idea of what to shoot for, a Qtc of around .5 is critically damped and will sound very lean and analytical. A Qtc of .7 will sound sharp and detailed. A Qts of 1 or higher will sound heavy or tubby. Hopefully that&#039;s helpful for you to reference what type of sealed setup might be appealing for your needs.Another approach is to use any driver with a low Qts, a very high BL product (ideally around 18 T*m and higher), lots of clean stroke, along with high mechanical/thermal power handling and shoehorn it into whatever size enclosure you need. Take a measurement of the frequency response and apply heavy EQ to match/compensate for your vehicle&#039;s transfer function and your personal tastes. It&#039;s pretty much a loose variation on the Linkwitz Transform and you&#039;ll need lots of power and stroke for this approach.</blockquote>

[QUOTE="ciaonzo, post: 6533682, member: 607015"] If you're looking for a driver that is specifically designed to be used in small sealed enclosures, this will help you. Shoot for a low Fs, generous Xmax, a Qts of .5 and higher, and a small Vas figure. Once you find drivers that fit into that criteria, you can double check it's suitability with this formula to find EBP (Efficiency Bandwidth Product). Fs/Qes = EBP. You want an EBP of around 65 or lower. 50 or less will be optimal. You can find the proper enclosure volume (in liters) to achieve a particular Qtc using this formula. Vb = Vas / (( Qtc / Qts ) ² - 1). There's about 28.3 liters in a cubic foot. To give you an idea of what to shoot for, a Qtc of around .5 is critically damped and will sound very lean and analytical. A Qtc of .7 will sound sharp and detailed. A Qts of 1 or higher will sound heavy or tubby. Hopefully that's helpful for you to reference what type of sealed setup might be appealing for your needs. Another approach is to use any driver with a low Qts, a very high BL product (ideally around 18 T*m and higher), lots of clean stroke, along with high mechanical/thermal power handling and shoehorn it into whatever size enclosure you need. Take a measurement of the frequency response and apply heavy EQ to match/compensate for your vehicle's transfer function and your personal tastes. It's pretty much a loose variation on the Linkwitz Transform and you'll need lots of power and stroke for this approach. [/QUOTE]

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