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Added more polyfill and now subs move?


Superdave

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Make so sub risers: 1/2 in plywood 20x20, cover with black outdoors carpet, and wheel coasters or 18 in 2x4's on the bottom.  Use adhesive spray and a stapler to apply the carpet to the 20x20 and 18 in. (2) running horizontal for legs or just screw in the wheel coasters to the 20x20.  I have all my subs on risers.  It makes life a lot easier for moving the sub and they sound better not sitting flat on the ground.

Edited by derrickdj1
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The more I think about it, I believe it's due to the fact that these 2 boxes are on 2x8 framed pedestals, wood on wood, not much friction compared to sitting on carpet? 

 

My ultimax's flex more than your HT-18's and my baltic birch is lighter than your MDF and I have polyfill too yet they don't budget on carpet.  

 

What's this flex you speak of? Lol!!

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