Originally Posted by Mixing Suite
From what I understand, the S3X-H's are now being shipped with the new style flange/port. Here's a picture of the old and new flange/port.
Observing the first photo your port was blocked by the damping material.
I did just change my pair of S3X-V for this problem.
A few days ago I received, in return for the second couple that has never had a problem with rattle or port noise, a third pair with new reflex ports (identical to that of the second photo).
Now I have both and I am waiting, after a burning period, to return the "worst" ...