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Hey everyone, new here. I have a pair of infinity crescendo cs-3009's. I am wondering about the poly fill in each sealed enclosure, they are 4 way speakers, so the midbass & midrange are in their own "tube" shaped enclosure. The midbass tube enclosure is 13" deep & is 6" in diameter, the mid-range tube enclosure is 5" deep & 4" in diameter. How much poly fill should go in there? Do I calculate the volume of the enclosure & decide how much then or do I measure volume and how much poly fill decreases the volume. If anyone can help I can take more pictures. also the area behind the woofers had nothing... just bare wood. Echoes bad, did these come from factory like that or should they most definitely have foam on the walls?
 

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