Sunfire mk II

Does anybody know of anyone in the N Y area that i can take my sunfire sub to and get rid of that nasty hum?
why not send it to sunfire? i had to do so some time ago and they upgraded it to mkiv and warranted it for a year. it lasted several years before i finally sold it to upgrade to signature eq version. but it was well worth the trouble; at least for me.
I sent mine to sunfire. They were well aware of their faults and very nice about it.