My reaction is to get new speakers if they are the problem.
If not, you could get an audiophile quality subwoofer with a bypass filter to reduce or cut-off the low bass signal going to your main speakers.
Otherwise, what is your budget for an amp?
If not, you could get an audiophile quality subwoofer with a bypass filter to reduce or cut-off the low bass signal going to your main speakers.
Otherwise, what is your budget for an amp?