Quote Originally Posted by dllyons View Post
I learned something today - even though I thought I had rebuilt the other 3 surrounds perfectly without using a test tone ... I found one rattling.

By playing the test tone, and then by exerting just a little pressure on one spot of the surround, the rattling ceased. I suppose that's telling me that I didn't get it centered as well as I thought ?
'zactly.

Quote Originally Posted by dllyons View Post
...so you're saying you run the tone as the glue is still wet ?
'zactly.

There has been some extensive posting on this in the Resurround Step-by-Step Thread, even sources for finding a 30Hz tone if you don't have the CD or a tone generator.