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  1. my first 1/4 wave? got a 5.5" tube 8'6" long

    DIY Subwoofers - General Discussion
    I got myself a cardboard tube that has an internal dia of 5.5" and it's 8 feet 6 and 5/8 inches long. I have a cheap walmart surround sound with a 5.25" "sub" that I already modified last summer with a paper towel tube to lower the tune and for fun i added a TP roll tube to the cone for an...