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Message: <blockquote data-quote="Doxquzme" data-source="post: 8860899" data-attributes="member: 689267">At least you know the possibilities are within reach. That RF is probably putting out close to 150 a side, but the little Black Brick is at 370 x 2, really nice deal. I've used the GRS, be careful,, it needs a pretty big ported box. Sealed it works great too.<table style='width: 100%'><tr><td>Sealed Volume</td><td>1.2ft³</td></tr><tr><td>Sealed F3</td><td>40.6Hz</td></tr><tr><td>Vented Volume</td><td>2.63ft³</td></tr><tr><td>Vented F3</td><td>22.2Hz</td></tr></table>I use the 1.2 Cu. Ft. sealed with 1 lb of Acusta-stuff, turned out pretty darn flat to about 38hz outside the car, measured close to 33 in the car. [URL unfurl="true"]https://www.parts-express.com/Acousta-Stuf-Polyfill-1-lb.-Bag-260-317?quantity=1[/URL]in this:[MEDIA=amazon]B000KFY2Z4[/MEDIA]Done.</blockquote>

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