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<blockquote data-quote="Immacomputer" data-source="post: 2324880" data-attributes="member: 570419">I would look for a sealed enclosure that is around 1.5 cubic feet for a smooth response out of that sub. 1.25 will work OK and give you decent power handling but will slightly reduce low end extension.F3 is the -3dB down point of the system from 100hz. So, in an open area free from reflections, the sub will be 3dB quiter at 41.3hz in the 1.25cubic foot enclosure. The Fc is the frequency at which the sub will be at resonance in the enclosure. Qtc is the same thing as the Qts of the sub only now in the enclosure at Fc.The larger the enclosure, the lower the Qtc up until the Qtc is equal to the Qts of the driver. When you&#039;re close to this point, the sub is basically free-air or in an infinite baffle. The lower the Qtc, the smoother the response. A Qtc of .7 is known as the butterworth alignment and is a great place to start with a sub sealed.</blockquote>

[QUOTE="Immacomputer, post: 2324880, member: 570419"] I would look for a sealed enclosure that is around 1.5 cubic feet for a smooth response out of that sub. 1.25 will work OK and give you decent power handling but will slightly reduce low end extension. F3 is the -3dB down point of the system from 100hz. So, in an open area free from reflections, the sub will be 3dB quiter at 41.3hz in the 1.25cubic foot enclosure. The Fc is the frequency at which the sub will be at resonance in the enclosure. Qtc is the same thing as the Qts of the sub only now in the enclosure at Fc. The larger the enclosure, the lower the Qtc up until the Qtc is equal to the Qts of the driver. When you're close to this point, the sub is basically free-air or in an infinite baffle. The lower the Qtc, the smoother the response. A Qtc of .7 is known as the butterworth alignment and is a great place to start with a sub sealed. [/QUOTE]

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