Dancing subs

[Cal Weldon]

Blue tack.

Certainly the place to start, perhaps in conjunction with a little weight on the top.

Oh my! Those heavy cones aren't supposed to down fire or soon the whole cone lays down on the floor!

I agree. Seems heavy to be downfiring regardless of the surround and spider.

 

[scholl]

Build other boxes and add a second woofer on the opposite side of the box to balance out the drive. Of better yet build a push pull slot loaded box. Google is your friend.