Another very easy and low risk thing to try is to add acoustic absorbing material inside to help dampen things further if that is not already the case.
No physical alterations are required with this. All that is needed is to gain access to the inside by removing the bass driver and carefully add the material in a manner that distributes it evenly to a uniform density throughout the inside. Just be sure to look before you stuff so as not to damage any fragile internal components like crossovers, etc.
No physical alterations are required with this. All that is needed is to gain access to the inside by removing the bass driver and carefully add the material in a manner that distributes it evenly to a uniform density throughout the inside. Just be sure to look before you stuff so as not to damage any fragile internal components like crossovers, etc.