One speaker is louder than the other

Not knowing your setup, have to tried disconnecting the sub from the system. You would have to disconnect the cables from the preamp/integrated rather than simply turning the sub off. You didn't mention if the sub was in use with your previous arrangement.

"...I think I have found the problem. the surrounds on both speakers are cracking and is worse on the right side. Plan to get them repaired this week....."

That will do it. Let us know what happens after the repair.