I think being turned up too loud is the biggest reason for a sub sounding bad. Your subs are terrific quality, so that isn't the problem.
Move them. Try them in the same corner. Try opposite corners but moving one one of them out a little from the corner (so they're asymetrical). Turn them down a little...
They should be outstanding subs, keep trying. I doubt spending more on your sub will solve your problem. They should be plenty slammy and not boomy.
Move them. Try them in the same corner. Try opposite corners but moving one one of them out a little from the corner (so they're asymetrical). Turn them down a little...
They should be outstanding subs, keep trying. I doubt spending more on your sub will solve your problem. They should be plenty slammy and not boomy.