Purchased brand new (not as a demo) from Goodwins Audio in April 2011. Lightly used and in excellent condition. Minimum impedance is 7.4 ohm. Easy to drive, loves tubes, very organic, detailed and dynamic sound. Used to be Stereophile Class A component. These are unique speakers that have almost no competition out there. For seasoned music lovers. I don't have the original box so PICK UP ONLY Near North Side Chicago. Lowballers will be kindly ignored. I can throw in the stands for an additional $50.00.