If you are going to sell any speaker to any individual whether it be tweeter, sub, mid or mid-bass , The right thing to do and that should be done before any posting is to test the speaker /speakers..same goes for any amp,HU, EQ, Ect. unless specified NOT TESTED/basicly.. Good luck i have this for sale..its what I think of and how i feel about the Yard Sales on Subs ect. That way you understand the risk.So test them or sell as is/not tested.Pull them, test them or leave them in the box Not Tested/sell as is not tested