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  1. MartinLogan Shows Off 15-Inch Dynamo 1500X Subwoofer

    Home Theater, Audio and Video News
    Source: BigPictureBigSound
  2. Building Sonotube w/ RL-P D4 15inch

    DIY Subwoofers - General Discussion
    Hello all. I am trying to figure out the diameter and height of the Sonotube and the length of the 6 inch port but I have no speaker software. Steve modeled it for someone that had the D2. This will be for HT only and I would like it to go down as low as possible. I have no test equipment so...