one subwoofer louder than other

[vandiar2 10+ year member]

Are there separate chambers for the speakers?
Is there a hole in one of the chambers?

If you push on the speakers (lightly with no music) does one appear to move easier than the other?

haven't tried but I will. i know there isn't a hole in the chamber though that i know of (hope not) but.. i will see. could be onto something there. thank you!